Name: Class: Date: CChapterhapter 1 . - 1E1 Science
Name:Class:Chapter1Worksheet 1.1Date:Introducing ScienceFor Science Matters Textbook Volume A, sections:1.1What is Science?1.2What is Technology?1.3Life-long Skills and AttitudesSecure Your BasicsWithout referring to the textbook, try to answer these questions. If you cannotanswer a question, look up the relevant section in your textbook.1.What is science?ABCD2.BDExcessive use of pesticidesProduction of nuclear bombAbility to accept other ideasPerseverance in obtaining an answerSticking fast to old beliefsWillingness to work hard for a solutionA good scientist needs to think ofABCD5.Creation of radioactive wastesInvention of the light bulb( C )Which of the following is not one of the qualities of a good scientific thinking?ABCD4.( B )Which of the following scientific applications benefits us?AC3.The study of how people live and workThe study of matter, energy and their interactionsThe study of numbersThe study of past eventsways to become famousways to solve a problemwho noticed the problem firstways to make money out of new discoveriesWhat are the three main branches of science?Biology, Chemistry and Physics 20072008 MarshallMarshall CavendishCavendish InternationalInternational (Singapore)(Singapore) PtePte LtdLtd( C ).( B )Note to Teacher:Other branches of science includegeology (the study of rocks and theearth’s structure) and astronomy(the study of natural space objects).Introducing Science1
6.Complete the table using the words in the box below. Each word may be used morethan once.physicistbiologistThing(s) the scientiststudieschemistastronomerThe scientist is called a/an AcidsChemistA starAstronomerA rainbowPhysicistThe moonAstronomerThe speed of a bulletPhysicistCrystalsChemistStarfishBiologistA skeletonBiologistThe blue skyPhysicistThe sky at nightAstronomerMap It OutComplete the graphic organiser that follows the question below.What are some of the qualities a scientist should have?CreativityObjectivityKeen observationQualitiesof a ntroducing ScienceNote to Teacher:Accept any otherreasonable answers. 20082007 MarshallMarshall CavendishCavendish InternationalInternational (Singapore)(Singapore) PtePte LtdLtd
Challenge Yourself 15 min Attempt the following questions within the time allocated.1.The Internet is a very useful communication tool for people around the world. But itcan also cause problems in society.a)Describe some advantages and disadvantages of using the Internet.Advantages:I can keep in touch with my friends by e-mail. I can be close to them even when they are very faraway. I don’t have to wait a long time for a reply to my mails like when I wrote and sent by post.I don’t have to depend on one textbook for my learning as there are many websites on a topic.Disadvantages:Some of the things on the Net are junk. I may learn the wrong thing. I get hooked on games andsurfing and waste a lot of time. Some websites teach people to do wrong or harmful things. Books,movies and musics get pirated.b)List some ways to use the Internet safely and wisely.Use the Internet only when necessary so that time is spent wisely. / Download or install programmeswhich can protect your computer from viruses. / Check more than one website to obtain theinformation you need in case some of these websites are not trustworthy. 20072008 MarshallMarshall CavendishCavendish InternationalInternational (Singapore)(Singapore) PtePte LtdLtdIntroducing Science3
2.Scientific discoveries and advances in technology are supposed to make our livesbetter. However, science often comprises the study of things around you for the sakeof knowing more about our world. This in itself seems like a good end to aim for. Isit always necessary that what you learn in science is useful? Discuss.Most discoveries have no use at the start. Einstein discovered that matter can be converted into energywith his famous equation E mc2. However, it was other scientists who made an atomic bomb out of thisdiscovery.Sir Alexander Fleming noticed that the mould on his germ culture dishes killed the germs. However,it was only later that the first antibiotic, called penicillin, was extracted from the mould to kill germs andsave lives. Hence, we will never know how useful a discovery is, until more work is done on it.Note to Teacher:s of scientists in the past byStudents may learn from the attitudeBank. It is hoped that bydoing the exercises given in the Ideato adopt these attitudes indoing these exercises, they will learntheir daily lives.4Introducing Science 20082007 MarshallMarshall CavendishCavendish InternationalInternational (Singapore)(Singapore) PtePte LtdLtd
Name:Class:Worksheet 1.2Date:For Science Matters Textbook Volume A, section:1.4Where Do Scientists Work?Secure Your BasicsWithout referring to the textbook, try to answer these questions. If you cannotanswer a question, look up the relevant section in your textbook.1.ABCD2.BC( C )Evaporating a liquid from a solutionMeasuring the volume of liquidMeasuring volume of gasSeparating different types of liquids( B )leave it alonepour an alkali over your handwash your hands with plenty of waterwipe off the acid with a piece of tissue paper.( C )What should you not do if some chemical gets into your mouth accidentally?ABCDReport the incident to your teacherRinse your mouth with plenty of waterSpit it out immediatelySwallow it 20072008 MarshallMarshall CavendishCavendish InternationalInternational (Singapore)(Singapore) PtePte LtdLtdLSSWB 01.indd 5DIf you accidentally touch a corrosive acid, you shouldABCD5.( A )What is the apparatus shown on the right used for?ABCD4.a procedure carried out to find the trutha recipe for finding the best answer to a questionany activity done on a laboratory tablethe gathering of informationWhich of the following is an incorrect drawing of laboratory equipment?A3.An experiment is( D )Introducing Science58/2/07 6:04:01 PM
6.The diagram below shows the set-up of an experiment.VTest tubeWBeakerXWire gauzeYTripod standZNote to Teacher:Students should havedone Activities 1.2and 1.3 in the practicalbook before doing thisquestion.Bunsen burnera)Name the apparatus labelled in the diagram above.b)Suggest some reasons why the substance in V is heated in a water bath.It might just melt when heated in hot water, but decompose when the test tube is heated directly onthe flame.c)State the function of each X and Y.X : To ensure heat is evenly distributed over the bottom of the beakerY : To support apparatus that is being heatedd)State three points to note when using Z.Adjust the air hole opening to obtain the desired flame. Light up the match right before turning onthe gas or shortly after. Turn off the gas after use.6Introducing Science 20082007 MarshallMarshall CavendishCavendish InternationalInternational (Singapore)(Singapore) PtePte LtdLtd
7.Many substances in the laboratory are hazardous. For such substances, hazardsymbols are shown on the container. Draw lines to match the symbols below withthe nature of the hazardous substance.SymbolHazard Flammable: Catches fire easily Corrosive: Substance will eat away other substances Poisonous: Substance that is harmful in small doses Biohazardous: Poisonous substance of a biological natureIrritable: Substance produces gases which irritatethe eyes, nose and throat Explosive: Will react violently when heated or struck Map It OutComplete the graphic organiser that follows the question below.When you carry out a practical activity in the science laboratory, you may have to put onsome laboratory safety equipment. What are these equipment?Rubber glovesSafety gogglesLaboratory safetyequipmentLaboratory coat 20072008 MarshallMarshall CavendishCavendish InternationalInternational (Singapore)(Singapore) PtePte LtdLtdNote to Teacher:Answers are not in thetextbook.Introducing Science7
Challenge Yourself 5 min Attempt the following question within the time allocated.Isaac had a science practical lesson after recess. He was late for the lesson and missedhis teacher’s explanation on how to handle corrosive chemicals. However, he wentahead and carried out the experiment. While doing the experiment, he spilled somechemical on the table and on his clothes, but ignored it. After the lesson ended, Isaacpoured the chemical into the sink. The apparatus were left in the sink when he left.a)b)What mistakes did Isaac make during the science practical lesson?1.When the chemical spilled on the table and on his clothes, Isaac ignored it.2.Isaac should not have poured the chemical into the sink without washing it away with water.3.Isaac should not leave the apparatus in the sink.What should Isaac have done instead?When Isaac spilled the chemical, he should have reported the incident to his teacher. He should haveasked his teacher if there was a need to dilute the spill before wiping it off. He should also ask histeacher if he should immediately change his clothes and wash them with plenty of water. He should,at the first place, wear a lab coat. After the lesson, Isaac should pour the chemical into the sink andwash the test tube. He should then dry the apparatus and place them back into their storage place.8Introducing Science 20082007 MarshallMarshall CavendishCavendish InternationalInternational (Singapore)(Singapore) PtePte LtdLtd
Name:Class:Worksheet 1.3Date:For Science Matters Textbook Volume A, section:1.5The Scientific MethodSecure Your BasicsWithout referring to the textbook, try to answer these questions. If you cannotanswer a question, look up the relevant section in your textbook.1.Which of the following is not a scientific method?ABCD2.An experimentA good guess based on observationsA scientific statementA well-written articleWhen carrying out experiments, we make observations toABCD4.( C )What is a hypothesis?ABCD3.Doing experiments to test ideasDiscussing ideas and making inferencesGiving attention and sympathyTaking down notes and recording datahelp us make use of our five senseshelp us gather data and informationmake sure we do not spill things accidentallypredict the future( B ).( B )Which of the following is not a scientific experiment?ABCDBaking three cakes — one using one egg, one using two eggs andone using three eggs — to see how the number of eggs used can affectthe cakeDriving a car at different speeds — from 40 kph (kilometres perhour) to 60 kph and to 80 kph — to find out the speed at whichthe car can stop most smoothly.Dyeing your hair — yellow for a month, brown for the nextmonth, and then pink in the following month — to see whichcolour looks best on youWatering three plants — one with a quarter cup of water, onewith half a cup of water and one with a full cup of water — tosee which plant can survive the longest( C ) 20072008 MarshallMarshall CavendishCavendish InternationalInternational (Singapore)(Singapore) PtePte LtdLtdIntroducing Science9
5.Which of the following questions might be suitable for a scientific study?ABCD6.Can plants grow faster with the help of music?How can love overcome all odds?How many prime numbers are there between 1 and 2,000?What can be done to persuade people not to shoplift?( A )The scientific method is a step-by-step way of thinking or acting. When you apply thescientific method, you analyse a problem or situation by moving through a series ofsteps.StageAction1Observe: Make an observation.2Question: Ask a question.3Make a hypothesis: Attempt to answer the question with a guess.4Test: Carry out an experiment to test your hypothesis.5Check: Does the guess answer your question? If not, discard theguess and repeat stages 3 and 4 with another guess. If it answers yourquestion, proceed to stage 6.6Conclude: If your guess answers the question, proceed to draw aconclusion about your question.Here are some statements that a person used to describe a scientific way of solvinga problem. Study each statement and identify which stage of the scientific methodthe person was at. Write the number down in the last column of the table below.Statement10StageRest is required to keep the mind alert.6Why do I feel sleepy when I study?2I feel sleepy when I study for long hours.1I take a ten-minute break for every hour I study.4Yes! I don’t feel sleepy anymore when I study.5Perhaps I feel sleepy when I study for long hours without rest.3Introducing Science 20082007 MarshallMarshall CavendishCavendish InternationalInternational (Singapore)(Singapore) PtePte LtdLtd
Map It OutComplete the graphic organiser that follows the question below.The scientific method comprises many steps. What are the most common steps in thescientific ypothesisE xperimentingConcludingTheoryChallenge Yourself 25 min Attempt the following questions within the time allocated.1.A hypothesis is a good guess as to the reason for an observation.For example, I observed that my sister’s shoes and umbrella were not at their usualplaces. I formed several possible hypotheses:1) She has gone out, taking her umbrella and wearing those shoes.2) They are both drying in the sun because it rained today.3) She gave both away to charity.4) Her friend who stayed overnight borrowed both of them.My next observation was that the shoes and the umbrella were found in the dustbin,even though they were in good condition. From this I drew the conclusion that:All my previous hypotheses were wrong.I proceed to form several new hypotheses, taking note of my observation:1) She didn’t want them anymore and threw them away.2) They fell into the dustbin by accident.3) There is some other reason yet unknown. 20072008 MarshallMarshall CavendishCavendish InternationalInternational (Singapore)(Singapore) PtePte LtdLtdIntroducing Science11
I then proceed to make further observations that either support or weaken eachhypothesis, discarding hypotheses that are wrong, until I arrive at the most likelyhypothesis.Now you try!Write down some simple hypotheses for the following observations.a)You observe a leaf outside your window floating upwards in the air.A gust of wind blows it upwards.Someone is raking leaves and has stirred this one up.Someone is scattering leaves about and has thrown this one up.b)You observe a withered plant that appears to be dying.Someone forgot to water it.Worms are eating away at its insides.The fertiliser used was too strong and thus the plant is suffering from dehydration.Some pest has eaten its roots.c)You observe no stars in the night sky.The sky is cloudy and all the stars are covered.The moon is too bright and overpowers the starlight.Light from the earth is scattered by dust in the atmosphere so that the scattered light is brighter thanthe starlight even without clouds in the sky. (This is generally true in Singapore.)d)You observe this evening’s sunset to be very red.The atmosphere is laden with moisture. It is going to rain.The scientific truth is that blue light has been scattered away from the white light coming from thesun, so that only red light is left to be seen by the eye. The agents of scattering are dust particlesand water vapour in the atmosphere.Note to Teacher:Remind students not to confuse observations with inferences.Inferences are something that we deduce from observations.12Introducing Science 20082007 MarshallMarshall CavendishCavendish InternationalInternational (Singapore)(Singapore) PtePte LtdLtd
Get It RightMarie wanted to find out whether the amount of food consumed has an effect on weightgain. So, she decided to test this out with mice.She chose two mice from the same litter to try out herhypothesis that the more food a mouse eats, the heavierand fatter it is. The two mice she chose were of the samegender and have the same weight. She fed one mousethe usual amount she always fed her mice, which wereall thin. She fed the other mouse twice the amountshe gave to the first mouse. Every two days sheweighed the mice before giving them food.She recorded their weights.a)In this experiment, what is the independent variable?The number of days since the experiment startedb)What is the dependent variable?The weight of the miceRecall the definitions of variables. Refer to the Science Matters Textbook, section 1.5 onThe Scientific Method.c)Why did she weigh them before they were fed?So that the weight of the food they ate will not be counted 20072008 MarshallMarshall CavendishCavendish InternationalInternational (Singapore)(Singapore) PtePte LtdLtdIntroducing Science13
d)Why did she choose to feed two mice?So that the first mouse, eating the usual amount of food, became the control to compare with the secondmouse.e)Why did she weigh the mice at the start of the experiment and choose two from thesame litter, of the same gender, and of the same weight?To keep the two mice as similar as possible. In this way, we cannot say that one mouse grew fatterbecause it came from a family of fat mice, or because it was a male, or that it was fat to start with.Analyse what is required in an experiment. Ask yourself, “Is the same starting conditionrequired?” and “What is the control set-up or condition?”f)Scientific studies on mice have shown that in similar experiments done withmany mice, the thin mice lived longer, were healthier and were more intelligent.From the results of these studies, what inference can you make on the health ofhuman beings?We should avoid overeating so that we will be healthier in the long run.Predict what would happen to a human being who eats more than what he or she shouldhave.14Introducing Science 20082007 MarshallMarshall CavendishCavendish InternationalInternational (Singapore)(Singapore) PtePte LtdLtd
Name:Class:Chapter2Worksheet 2.1Date:Measurement and UnitsFor Science Matters Textbook Volume A, sections:2.12.2The Importance of AccurateMeasurement and Standard Units2.3Measuring Length2.4Measuring AreaUnits of MeasurementSecure Your BasicsWithout referring to the textbook, try to answer these questions. If you cannotanswer a question, look up the relevant section in your textbook.1.You are given four instruments, A, B, C and D.ABCDWhich instrument would you use to measure each of the following objects?a)Length of a book( A )b)Thickness of a book( D )c)Height of a cupboard( C )d)Length of a pendulum( A )e)Width of a hole in a bowling ball( D )f)Waist measurement of a person( 2008 Marshall Cavendish International (Singapore) Pte LtdB)Measurement and Units15
2.The external diameter of a pipe was measured. The figure below shows the readingon the vernier calipers. What is the external diameter of the pipe?1ABCD21.00 cm1.03 cm1.30 cm3.00 cm( B )53.The diameter of a thin wire was measured with a pair of vernier calipers. Figure Ashows the reading when the wire was measured. Figure B shows the reading whenthe wire was removed and the jaws were fully closed.102515Figure AFigure BWhat is the diameter of the wire?AC4.0.25 cm0.93 cmBD0.61 cm1.53 cm( B )State the readings given by the following vernier scales:11a)127b)5Answer:5.16510.92 cmAnswer:6.59 cmConvert the following quantities into the units given.1.251,0001,250a)1.25 km b)850 m 850 0.001km 0.85kmc)120 m 120 100cm 12,000cmd)15 cm 15 0.001m 0.015Measurement and Units m mm 2008 Marshall Cavendish International (Singapore) Pte Ltd
6.The outline of a flower is shown in the grid below. Find its area.Key 2 unit2No. of ticks 772Area 154 unit7.Outline how you would go about obtaining the most accurate reading for thefollowing:a) Height of a personPaste a measuring tape on the wall, with the zero mark at the floor level. Ask the person to standagainst the measuring tape. Slide a flat folder (or book) onto the person’s head and take the readingwhere the folder touches the tape. This is to avoid parallax error.b)Depth of a hole in the wall made by a drillInsert the tail end of the vernier calipers to the bottom of the hole and take readings from the verniercalipers. Check for zero error and tak
IIntroducing Sciencentroducing Science Worksheet 1.1 For Science Matters Textbook Volume A, sections: 1.1 What is Science? 1.3 Life-long Skills and Attitudes 1.2 What is Technology? Without referring to the textbook, try to answer these questions. If you cannot answer a question, look up the relevant section in your textbook. 1. What is science?
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3. When iron fi lings are added to sulphur powder and heated, the reaction is . A called combination B called combustion C called decomposition D reversible ( ) 4. Electricity can cause the following effects except . A contraction of an iron bar B decomposing water C heating
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8 - 8-6 1 2 3 4 5 6 7 8 9 10 11 12 13 14 A B C D EA9-USER-M Hardware User Manual, 1st Ed. Rev. N 3.) There is always the remote possibility that a project has been .
Straw into Gold by Sandra Cisneros 10 1. NEA: National Endowment for the Arts, a federal agency that grants money to selected organizations and individuals so they may engage in creative pursuits. The Metamorphosis of the Everyd
FOR O-LEVEL / IGCSE FOR UEC FOR STPM OTHER PRE-UNIVERSITY PROGRAMS Closing Date: 2 weeks before class commencement Closing Date: 2 weeks before class commencement Closing Date: 2 weeks before class commencement Closing Date: 2 weeks before class commencement Closing Date: 2 weeks before class commencement AUP (1ST YEAR) / A-LEVEL (3 subjects)
Curriculum Framework. In addition, the Enhanced Scope and Sequence provides teachers with sample lesson plans aligned with the standards and their related essential understandings, knowledge, and skills. School divisions and teachers can use the Enhanced Scope and Sequence as a resource for developing sound curricular and instructional programs. These materials are intended as examples of ways .
