HOLT Life Science - Mark Twain Middle School
HOLT CALIFORNIALife ScienceStudy GuideGuide AAStudywith Directed Reading Worksheets
TO THE STUDENTDo you need to review the concepts in the text? If so, this booklet will help you. The StudyGuide is an important tool to help you organize what you have learned from the chapter sothat you can succeed in your studies. The booklet contains a Directed Reading worksheetand a Vocabulary and Section Summary worksheet for each section of the chapter.Use these worksheets in the following ways: as a reading guide to identify and study the main concepts of each chapter before or afteryou read the text as a place to record and review the main concepts and definitions from the text as a reference to determine which topics you have learned well and which topics you mayneed to study furtherCopyright by Holt, Rinehart and WinstonAll rights reserved. No part of this publication may be reproduced or transmitted in any form or byany means, electronic or mechanical, including photocopy, recording, or any information storage andretrieval system, without permission in writing from the publisher.Teachers using HOLT CALIFORNIA SCIENCE may photocopy complete pages in sufficient quantities forclassroom use only and not for resale.HOLT and the “Owl Design” are trademarks licensed to Holt, Rinehart and Winston, registered in theUnited States of America and/or other jurisdictions.Printed in the United States of AmericaIf you have received these materials as examination copies free of charge, Holt, Rinehart and Winston retainstitle to the materials and they may not be resold. Resale of examination copies is strictly prohibited.Possession of this publication in print format does not entitle users to convert this publication, or any portion of it,into electronic 13: 978-0-03099-394-71 2 3 4 5 6 7 054 11 10 09 08 07 06
ContentsThe Nature of Life ScienceDirected Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . . 18It’s Alive!! Or Is It?Directed Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . . 32Light and Living ThingsDirected Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . . 49Cells: The Basic Units of LifeDirected Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . . 66The Cell in ActionDirected Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . . 81HeredityDirected Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 83Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . . 96Genes and DNADirected Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 99Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . 107Studying Earth’s PastDirected Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 109Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . 117The History of Life on EarthDirected Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 121Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . 136The Evolution of Living ThingsDirected Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 139Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . 151Copyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life ScienceiiiStudy Guide A
ClassificationDirected Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 154Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . 162Introduction to PlantsDirected Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 165Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . 182Plant ProcessesDirected Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 187Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . 197Introduction to AnimalsDirected Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 200Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . 216Body Organization and StructureDirected Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 220Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . 230Circulation and RespirationDirected Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 233Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . 243Communication and ControlDirected Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 248Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . 255Reproduction and DevelopmentDirected Reading A Worksheets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 259Vocabulary and Section Summary A Worksheets . . . . . . . . . . . . . . . . . 267Copyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life ScienceivStudy Guide A
NameClassDateSkills WorksheetDirected Reading ASection: Asking About Life (pp. 8–11)Write the letter of the correct answer in the space provided.1. What is the first step in a scientific investigation?a.b.c.d.drawing a conclusiondoing researchasking questionssolving problems2. What is the study of living things called?a.b.c.d.technologylife scienceinvestigationasking questionsSTARTING WITH A QUESTION3. What do algae, redwood trees, and whales show?a.b.c.d.the diversity of lifelife sciencelab investigationsasking questions4. What is NOT a question you could ask about a living thing?a.b.c.d.How does it get food?Where does it live?How can I build one?Why does it behave this way?In Your Own Backyard5. Which of the following is a life science question you might ask aboutan organism?a. Can that model airplane fly?b. What is your dog’s name?c. Are you happy today?d. Why do leaves change color in the fall?Touring the World6. What will you find just about anywhere in the world you go?a. desertsb. oceansc. organismsd. forestsCopyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science1The Nature of Life Science
NameClassDateDirected Reading A continuedINVESTIGATION: THE SEARCH FOR ANSWERS7. Once you ask a question, what should you do next?a.b.c.d.Stop investigating.Come to a conclusion.Start another project.Look for an answer.Research8. What is the only information that scientists use?a.b.c.d.information from reliable sourcesinformation from their familiesinformation from the governmentinformation from the World Wide WebObservationMatch the correct description with the correct term. Write the letter in the spaceprovided.9. looking for information in print andelectronic sourcesa. researchb. observation10. doing an activity designed to answerc. experimentationa question11. looking carefully at somethingWHY ASK QUESTIONS?Fighting DiseasesUse the terms from the following list to complete the sentences below.pollutionfoodenvironmentdiseases12. Life scientists learn aboutsuch as AIDS in order totry to find cures.13. Some life scientists study ways to produce enoughto feed everyone.14. Scientists find solutions to such problems as the extinction of wildlife bystudying the.15. One environmental problem that can harm the health of living organisms is.Copyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science2The Nature of Life Science
NameClassDateSkills WorksheetDirected Reading ASection: Scientific Methods (pp. 12–19)WHAT ARE SCIENTIFIC METHODS?Use the terms from the following list to complete the sentences below.asking questionsscientific methods1. Theare a series of steps scientists use to solveproblems.2. One step of the scientific methods is.ASK A QUESTIONWrite the letter of the correct answer in the space provided.3. What usually happens when you observe something that is hard toexplain?a. You ask questions.b. You do experimentsc. You forget about it.d. You do nothing.MAKE OBSERVATIONSUse the terms from the following list to complete the sentences below.countingaccuratemeasurements4. The students made observations bydeformedfrogs and normal frogs.5. The students photographed the frogs and tookof them, as well as writing descriptions.6. Observations are useful only if they are.Types of ObservationsWrite the letter of the correct answer in the space provided.7. What is any information that you gather through your senses questionCopyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science3The Nature of Life Science
NameClassDateDirected Reading A continued8. What is a tool scientists use to make observations?a.b.c.d.a hammera calculatora microscopea spoonFORM A HYPOTHESIS9. What is a possible explanation or answer to a question called?a.b.c.d.an experimenta hypothesisan observationa measurement10. What is true of a good hypothesis?a.b.c.d.It is an experiment.It is easy to remember.It is always true.It can be tested.11. What should a hypothesis be based on?a.b.c.d.observationtoolsexplanationa statementPredictions12. What is a statement of cause and effect that can help test ahypothesis?a. an experiment.b. an observationc. a predictiond. a measurement13. How are predictions usually stated?a.b.c.d.as a questionin an if-then formatin codeas a hypothesisCopyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science4The Nature of Life Science
NameClassDateDirected Reading A continuedTEST THE HYPOTHESISUse the terms from the following list to complete the sentences below.controlled experimentvariablefactor14. Anything in an experiment that can influence an experiment’s outcome isconsidered a(n).15. An experiment that tests only one factor at a time is a(n).16. The factor that differs between groups in an experiment is the.Designing an ExperimentWrite the letter of the correct answer in the space provided.17. What must be considered when you design an experiment?a.b.c.d.every factortemperaturemany variableslight18. What guidelines must scientists use when designing an ledCollecting Data19. Why do scientists try to test many individuals?a.b.c.d.to be more certain of their datato get a good hypothesisto have many variablesto have a big experiment20. What is one way that scientists can support their conclusions?a.b.c.d.by stopping their investigationby telling their familyby repeating experimentsby asking questionsCopyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science5The Nature of Life Science
NameClassDateDirected Reading A continuedANALYZE THE RESULTS21. What do scientists do before they analyze the results of anexperiment?a. They organize the data.b. They begin a new experiment.c. They draw a conclusion.d. They write up their results.DRAW CONCLUSIONS22. What are scientists deciding when they draw conclusions?a.b.c.d.whether to put the data in a graphwhich factor is the variablewhether the results support their hypothesiswhich group should be the control group23. What must a scientist do when a hypothesis is proved wrong?a.b.c.d.organize the data againfind another explanationtell people it was rightretire from scienceWhat Is the Answer?24. What is true about finding an answer to a question?a.b.c.d.It may begin another investigation.No more questions can arise.The question was not good.The experiment was done wrong.COMMUNICATE RESULTS25. Why do scientists share their results?a.b.c.d.so other scientists can make money from themso other scientists can repeat the experimentsto practice writingto hide their mistakesCopyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science6The Nature of Life Science
NameClassDateSkills WorksheetDirected Reading ASection: Tools and Measurement (pp. 20–25)Write the letter of the correct answer in the space provided.1. What do life scientists use to make observations and to handleinformation?a. ideasb. toolsc. hypothesesd. conclusionsTECHNOLOGY IN SCIENCE2. Which of the following means the use of science for practicalpurposes?a. scientific methodsb. problem solvingc. technologyd. measurementCalculators and ComputersUse the terms from the following list to complete the sentences below.computerscalculationsequations3. Calculators and computers can be used by scientists to make quick andaccurateof data.4. Some calculators and computers can be programed to solve.5. Scientists useto share data and ideas and topublish reports of their work.Copyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science7The Nature of Life Science
NameClassDateDirected Reading A continuedBinocularsMatch the correct description with the correct term. Write the letter in the spaceprovided.6. bounces electrons off something to make a3-D image7. helps scientists make observations froma distance8. passes electrons through something tomake a flat imagea. binocularsb. scanning electronmicroscopec. compound lightmicroscoped. transmission electronmicroscope9. uses lenses to magnify small objects sothey can be seenMEASUREMENTThe International System of UnitsWrite the letter of the correct answer in the space provided.10. Which is an important skill in science?a.b.c.d.the ability to make reliable measurementsknowledge of astronomyknowing the length of a footthe ability to guess about sizes11. Which is an advantage of the SI system?a.b.c.d.It is based on grains of wheat.It helps scientists share information.It is based on astronomy.It works most of the time.12. Why is the SI system easy to use?a.b.c.d.Most SI units are based on 10.Most SI units are inches, feet, and quarts.Most SI units are very large.There are a great number of SI units.Length13. Which unit is used for measuring length?a.b.c.d.grams (g)milliliters (mL)millimeters (mm)cubic centimeters (cm3)Copyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science8The Nature of Life Science
NameClassDateDirected Reading A continuedArea14. What is a measure of how much surface an object has?a.b.c.d.arealengthmicrometersvolume15. How is area stated?a.b.c.d.in meters and centimetersin volumesin litersin square unitsVolume16. What is the term for the size of an object in three-dimensional space?a.b.c.d.its lengthits areaits volumeits mass17. Which of the following is NOT used to measure volume?a.b.c.d.square micrometercubic centimetermilliliterliter18. What tool could you use to measure the volume of a liquid?a.b.c.d.a meter sticka balancea microscopea graduated cylinder19. How do you find the volume of a box-shaped object?a.b.c.d.Multiply its length by its width.Multiply its length by its width and then by its height.Divide its length by its width.Add its width, length, and height.Mass and Weight20. What term means the amount of matter in an object?a.b.c.d.its lengthits areaits volumeits massCopyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science9The Nature of Life Science
NameClassDateDirected Reading A continued21. Which of the following is NOT true about the mass of an object?a.b.c.d.It changes depending on where it is.It is the same anywhere in the universe.It can be measured by using a balance.It can be described in grams.22. What is weight?a.b.c.d.a measure of surface areaa measure of the amount of mattera measure of the force of gravitya measure of volumeTemperatureUse the terms from the following list to complete the sentences below.energykelvintemperature23. The measure of how hot or cold something is is called.24. Temperature actually shows the amount ofwithinmatter.25. Scientists use degrees Celsius to describe temperature, but the official SI unitis the.Copyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science10The Nature of Life Science
NameClassDateSkills WorksheetDirected Reading ASection: Scientific Models and Knowledge (pp. 26–31)TYPES OF SCIENTIFIC MODELSWrite the letter of the correct answer in the space provided.1. What is a representation of an object or system?a.b.c.d.a modela predictionan observationa limitation2. What is a problem with models?a.b.c.d.They are small.They are not real.They are on computers.They may be physical.3. Which of these is NOT a type of scientific model?a.b.c.d.fashion modelconceptual modelmathematical modelphysical modelPhysical Models4. Which is a physical model?a.b.c.d.an equationa comparisona toy rockethuman bonesMathematical Models5. What kind of model is made of numbers and equations?a. mathematical modelb. scientific methodc. physical modeld. conceptual model6. Which of the following is an example of a mathematical model?a.b.c.d.a plastic skeletona model airplanea graph of life expectancya drawing of a human cellCopyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science11The Nature of Life Science
NameClassDateDirected Reading A continued7. What is NOT true of computers?a.b.c.d.They are useful for creating mathematical models.They always make correct models.They can keep track of many variables.They make fewer mistakes than humans.Conceptual Models8. What kind of scientific model is a diagram that shows how somethingworks?a. mathematical modelb. physical modelc. simple modeld. conceptual model9. What can a conceptual model show?a.b.c.d.what a dinosaur looked likewhere a city is locatedhow parts of a system affect one anotherhow long people liveUSING SCALE IN MODELSUse the terms from the following list to complete the sentences below.proportionsscale10. The relationship between the measurement of a model and the measurementof the real object is called.11. Scale models, maps, and diagrams havethat matchthose of the real object.BENEFITS OF MODELSWrite the letter of the correct answer in the space provided.12. What are models NOT used for?a.b.c.d.to read diagrams and mapsto show animals that no longer existto represent very complicated machinesto show things that are very large or small13. What can be a kind of hypothesis?a.b.c.d.a questiona modela limitationan observationCopyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science12The Nature of Life Science
NameClassDateDirected Reading A continuedBUILDING SCIENTIFIC KNOWLEDGE14. What happens to scientific knowledge when scientists find newanswers?a. It changes and gets smaller.b. It grows and changes.c. It disappears.d. It is no longer respected.Scientific TheoriesMatch the correct description with the correct term. Write the letter in the spaceprovided.15. a summary of many experimental resultsthat rarely changesa. theoryb. law16. an explanation that ties together manyrelated facts and observationsCombining Scientific IdeasWrite the letter of the correct answer in the space provided.17. What kinds of laws are at work inside your cells?a. simple lawsb. laws of measurementc. civil lawsd. laws of chemistry18. Why are there few laws within life science?a. because there are many theoriesb. because living organisms are simplec. because living organisms are complexd. because there are no investigationsScientific Change19. What did computer models of Apatosaurus’s neck show?a.b.c.d.that scientific ideas can changethat old ideas are the bestthat scientific ideas never changethat models are not usefulEvaluating Scientific Ideas20. What kind of theory do most scientists accept?a.b.c.d.those that will make them moneythose that the government supportsthose that their families likethose supported by the most evidenceCopyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science13The Nature of Life Science
NameClassDateSkills WorksheetDirected Reading ASection: Safety in Science (pp. 32–37)THE IMPORTANCE OF SAFETY RULESWrite the letter of the correct answer in the space provided.1. What is the state of being free of injury or danger?a. experimentsb. sciencec. accidentsd. safety2. What is the most important safety rule in science?a.b.c.d.Follow your teacher’s directions.Wear an apron.Don’t do experiments.Don’t ask questions.Preventing Accidents3. Why should you obey safety rules?a. to please your teacherb. to prevent accidentsc. to learn more scienced. to have more funPreventing Injury4. How can safety rules help you avoid or reduce injury?a. by preventing all accidentsb. by protecting you when accidents happenc. by protecting lab equipment from ever being damagedd. by preventing only the worst accidentsELEMENTS OF SAFETY5. What can safety symbols alert you to?a. ways to make friendsb. new experimentsc. possible dangersd. new ways to learnCopyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science14The Nature of Life Science
NameClassDateDirected Reading A continuedSafety Symbols6. Which of the following are on your chart of safety symbols?a. toy safety, sports safetyb. electrical safety, chemical safetyc. water safety, boating safetyd. automobile safety, traffic safety7. What is NOT something that the animal safety symbol tells you to do?a. Use animals provided by your teacher.b. Bring wild animals into the classroom.c. Wash your hands after the activity.d. Pick up the animals the way your teacher tells you to.Reading and Following Directions8. What should you do before every science experiment?a. Turn on your hot plate.b. Read all the instructions carefully.c. Ask your friend what to do.d. Tell your friends what to do.9. If you don’t understand directions, what should you do?a. Do another experiment.b. Skip over them.c. Ask your friend to explain them.d. Ask your teacher to explain them.Neatness Counts!10. Why should you arrange your materials neatly during an experiment?a. so you can find them easilyb. to make your teacher happyc. so your work area looks niced. so you can go home earlyUsing Proper Safety Equipment11. What should you do if you need to handle hot objects?a. Use your apron.b. Ask your friend to handle them.c. Wear heat-resistant gloves.d. Give them to your teacher.Copyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science15The Nature of Life Science
NameClassDateDirected Reading A continuedProper Cleanup Procedures12. What should you do with open bottles after an activity?a. Leave them open.b. Place the caps back on them.c. Take them home.d. Wash and dry them.Match the correct description with the correct element of safety. Write the letter inthe space provided.13. clearing your backpack off your work area14. washing your glasswarea. recognizing safetysymbolsb. following directions15. wearing goggles and protective glovesc. practicing neatness16. knowing what the symbol of a flame meansd. using the rightsafety equipment17. reading instructions before you startan activitye. cleaning up properlyPROPER ACCIDENT PROCEDURESMatch the correct description with the correct safety step. Write the letter in thespace provided.18. Help your teacher with clean up or first aid.19. Secure the area around the accident.a. step 1b. step 2c. step 320. Remain calm and check the situation.d. step 421. Tell your teacher or call for help.Write the letter of the correct answer in the space provided.22. What should you know about emergency equipment in yourclassroom?a. who made it and what it is calledb. how to use it and where it is keptc. when it was made and how to use itd. who made it and where it is keptCopyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science16The Nature of Life Science
NameClassDateDirected Reading A continuedPROPER FIRST-AID PROCEDURES23. What is first aid?a. a healthful fruit drinkb. food and water for sick peoplec. hospital care for injured peopled. temporary emergency medical care for injured people24. Which of the following is first aid for a small cut?a. Hold it under running water for 15 minutes.b. Clean, cover with gauze, and apply pressure.c. Rinse with eyewash.d. Leave the injury alone.25. How would you treat a minor heat-related burn?a.b.c.d.Hold it under running water for 15 minutes.Rinse with eyewash.Clean, cover with gauze, and apply pressure.Put butter on it.26. What should an injured person do after being treated with a first-aidprocedure?a. eat some healthy foodb. do nothing elsec. send a report to the policed. see a doctor for more treatmentCopyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science17The Nature of Life Science
NameClassDateSkills WorksheetVocabulary and Section Summary AAsking About LifeVOCABULARYIn your own words, write a definition of the following term in the space provided.1. life scienceSECTION SUMMARYRead the following section summary. Science is a process of gathering knowledge about the natural world. Scienceincludes making observations and asking questions. Life science is the study ofliving things. To find answers to your questions, you can make observations, do experiments,or use print and electronic resources to do research. Life science can help find cures for diseases, can research food sources, canmonitor pollution, and can help living things survive.Copyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science18The Nature of Life Science
NameClassDateSkills WorksheetVocabulary and Section Summary AScientific MethodsVOCABULARYIn your own words, write a definition of the following terms in the space provided.1. scientific methods2. hypothesis3. controlled experiment4. variableSECTION SUMMARYRead the following section summary. Scientific methods are the ways in which scientists follow steps to answerquestions and solve problems. Any information gathered through the senses is an observation. Observationsoften lead to the formation of questions and hypotheses. A hypothesis is a possible explanation or answer to a question. A well-formedhypothesis may be tested by experiments. A controlled experiment tests only one factor at a time and consists of a controlgroup and one or more experimental groups. After testing a hypothesis, scientists analyze the results and draw conclusionsabout whether the hypothesis is supported. Communicating results allows others to check the results, add to theirknowledge, and design new experiments.Copyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science19The Nature of Life Science
NameClassDateSkills WorksheetVocabulary and Section Summary ATools and MeasurementVOCABULARYIn your own words, write a definition of the following terms in the space provided.1. technology2. compound light microscope3. electron microscope4. area5. volume6. mass7. weight8. temperatureCopyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science20The Nature of Life Science
NameClassDateVocabulary and Section Summary A continuedSECTION SUMMARYRead the following section summary. Life scientists use tools to collect, store, organize, analyze, and share data. Scientists use technology such as calculators, computers, binoculars, andmicroscopes. The International System of Units (SI) is a simple and reliable system ofmeasurement that is used by most scientists. Graduated cylinders measure the volume of liquids, rulers measure length,thermometers measure temperature, and balances measure mass. You can calculate the area and volume of box-shaped solids by usingmeasurements taken with a ruler.Copyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science21The Nature of Life Science
NameClassDateSkills WorksheetVocabulary and Section Summary AScientific Models and KnowledgeVOCABULARYIn your own words, write a definition of the following terms in the space provided.1. model2. scale3. theory4. lawSECTION SUMMARYRead the following section summary. A model is a representation of an object or system. Models often use familiarthings to represent unfamiliar things. Three main types of models are physical,mathematical, and conceptual models. Scale models, maps, or diagrams match the proportions of the objects theyrepresent. Scientific knowledge is built as scientists form and revise scientific hypotheses,models, theories, and laws.Copyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science22The Nature of Life Science
NameClassDateSkills WorksheetVocabulary and Section Summary ASafety in ScienceVOCABULARYIn your own words, write a definition of the following term in the space provided.1. first aidSECTION SUMMARYRead the following section summary. Following safety rules helps prevent accidents and helps reduce injury. Five elements of safety are recognizing safety symbols, following directions,being neat, using proper safety equipment, and using proper cleanup procedures. Animals used in scientific research require special care. When an accident happens, you should assess the situation, secure the area, tellyour teacher, and help your teacher with cleanup or first aid. First aid is emergency medical care. Some first-aid procedures can be donewithout training.Copyright by Holt, Rinehart and Winston. All rights reserved.Holt California Life Science23The Nature of Lif
Teachers using HOLT CALIFORNIA SCIENCE may photocopy complete pages in sufficient quantities for classroom use only and not for resale. HOLT and the "Owl Design" are trademarks licensed to Holt, Rinehart and Winston, registered in the United States of America and/or other jurisdictions. Printed in the United States of America ISBN -03-046529-X
Mark Twain, A Biography 1886-1900, by Albert Paine[mt4bg10.txt]2985 Mark Twain, A Biography 1875-1886, by Albert Paine[mt3bg10.txt]2984 Mark Twain, A Biography 1866-1875, by Albert Paine[mt2bg10.txt]2983 Mark Twain, A Biography 1835-1866, by Albert Paine[mt1bg10.txt]2982 VOLUME I, Part 1: 1835-1866
Twain's religious attitudes are clearly seen in his writings. However, there are, in fact, critics who find Twain a religious man, though one with numerous doubts. William C. S. Pellow, for example, writes in his Mark Twain: Pilgrim from Hannibal that "Twain was a religious man, right up to the last, for no irreligious person could have written The
Matthew 27 Matthew 28 Mark 1 Mark 2 Mark 3 Mark 4 Mark 5 Mark 6 Mark 7 Mark 8 Mark 9 Mark 10 Mark 11 Mark 12 Mark 13 Mark 14 Mark 15 Mark 16 Catch-up Day CORAMDEOBIBLE.CHURCH/TOGETHER PAGE 1 OF 1 MAY 16 . Proverbs 2—3 Psalms 13—15 Psalms 16—17 Psalm 18 Psalms 19—21 Psalms
Mark Twain Using Real Life to Create Fiction: Mark Twain Style Developed by Dr. Cindy Lovell . 2 . Name Characteristics . 10 Settings There are many settings in Tom Sawyer, the primary one, of course, being . Which do you think only happened in Mark Twain’s imagination? Next, thin
essence of Tom Sawyer. Mark Twain’s Top Hat. Mark Twain’s Top Hat by Aliza Razell Hoover Mark Twain derived great pleasure from standing out and looking distinguished. When he wanted to make an especially striking impression, he would don me. I am one of his
Roughing It by Mark Twain Roughing It by Mark Twain This etext was produced by David Widger ROUGHING IT by Mark Twain 1880 TO CALVIN H. HIGBIE, Of California, an Honest Man, a Genial Comrade, and a Steadfast Friend. THIS BOOK IS INSCRIBED By the Author, In Memory of the Curious Time When We Two WERE MILLIONAIRES FOR TEN DAYS. page 1 /
Jun 22, 2017 · The class then moves on to the essays of Twain, primarily “Corn-Pone Opinions” and “Disgraceful Persecution of a Boy.” They identify the following for each: 1. Twain’s thesis 2. Twain’s purpose & intended effect on his audience 3. Twain’s target 4. The rhetorical and language devices he uses to achieve this effect
Bio-Zoology Practical - General Instruction In order to get maximum benefit and good training it is necessary for the students to follow the following instructions. 1. The students must attend all practical classes. Each experiment in practicals has got important relevance to theory subjects. 2. Bring this practical manual to your practicals class. 3. Bring the following objects to the .
