Science Journal: Grade 4 Light Unit - WordPress

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Science Journal:Grade 4Light UnitName:

Natural Vs. Artificial LightDate:Light that occurs in nature is natural light. Light that is created bypeople, and does not occur naturally is artificial light.Artificial LightNatural Light

In the Chart are objects of sources of light. Identify them as either Natural orArtifical sources of light and whether they give off heat or produce no heat atall.ObjectNatural or Artificial?Gives off heat orproduces no heat?Light bulbCandleSunLampFirefliesFlashlight

Emitting vs. Reflecting LightDate:Most things do not actually emit their own light but we see them because lightbounces off them. They reflect light and some objects reflect light better thanothers.Directions: Identify whether each object is a ‘source of light’ or if it is a‘reflection of light’. Write ‘source of light’ or ‘reflection of light’ in the boxnext to each object.Objects:Source of light or Reflection of light?:Cat’s eyesMoonLaserStarsSunForest fireMatch flameCandleBicycle reflectorLight bulbfireflyDirections: Identify each object as a light source or a reflector. Write ‘lightsource’ or ‘reflector’ in the box.

Human-Made Sources of LightDate:Different types of Human-made sources of light were designed to solveproblems within our daily lives. We use these sources of light at school,home and in the community daily.Directions: In the chart below, brainstorm types of lights that areused in your school, home and community. Write or draw it down inthe source of light column and then explain the problem that thatlight solved in the next column. In the last column explain how youcan conserve this light by its length of use or by using other types ofsources of light.Source of LightProblem it solvedHow to conserve thisenergy

Negative Effects of Exposure to Light ExperimentDate:Purpose: Students will experiment to see the effects of sun exposure andwhat it can do to human skin and eyes.Materials: 4 Styrofoam plates, Hand full of UV beads, 3 different typesof sunscreen (SPF 15, 30 and 45).*Instructions posted on the board*Predict:(What do you thinkis going to happen?)Observe:(What do you seehappening duringthe experiment?Draw what ishappening if youcan.)Explain:(What happened andwhy do you think ithappened? Anytheories?)

Light Dispersion ExperimentDate:Purpose: To show the separation of white lightMaterials: Prism, screen or wall, flashlight, bristol board or heavy paperPredict:(What doyou think isgoing tohappen?)Observe:1.2.(What doyou seehappeningduring theexperiment?)Explain:(Whathappenedand why doyou think ithappened?Anytheories?)Extension: Using your knowledge from this experiment and ‘dispersion’, explainhow rainbows are formed and appear in the sky.

Colour Wheels ExperimentDate:Purpose: To reinforce the concept that white light is made of colours.Materials: 7 crayons: red, orange, yellow, green, blue, indigo (blue pluspurple), and violet (purple); scissors; 24” of strong, thin string;sharpened pencilPredict:(What do youthink is going tohappen?)Observe:(What do yousee happeningduring theexperiment?Draw what ishappening ifyou can.)Explain:(What happenedand why do youthink ithappened? Anytheories?)

Spinning White LightMaterials: 7 crayons: red, orange, yellow, green, blue, indigo (blue plus purple), and violet(purple); scissors; 24” of strong, thin string; sharpened pencilSteps:1. Colour each section of the wheel using the colours shown.2. Cut out the wheel. Using a pencil, carefully poke two small holes in the center of thewheel as shown (Figure 1).3. Thread the string through the holes and tie the ends together. Center the circle on thestring (Figure 2).4. Follow your teacher’s directions to make the spinner spin properly (Figure 3).

Light Interaction with Objects ExperimentDate:Purpose: To observe the effect of a light on different types of materials.Materials: Clear glass or transparent plastic wrap; waxed paper;cardboard, flashlightTransparent Object-Clear Glass or plastic wrapPrediction:Observations:Diagram of observation:Explanation: My definition of Transparent from observation is.

Translucent Object- Waxed paperPrediction:Observation:Diagram of Observation:Explanation: My definition of Translucent from observation is.

Opaque Object- CardboardPrediction:Observations:Diagram of Observations:Explanation: My definition of Opaque from observation is.

Transparent, Translucent and Opaque ClassificationDate:Purpose: To reinforce the concepts of transparent, translucent andOpaque objects.Materials: flashlights; writing paper; newspaper; plastic wrap; tin can;plain glass edged with tape; frosted glass edged with tape; magnifyingglass; sunglasses; latex glove; construction paper; tissue paper;aluminum foil; white plastic lid; a leaf, etc.Classify each object as transparent, translucent, or opaqueTransparentTranslucentOpaque(can see through(can see through but (cannot see through atclearly)not clearly)all)

Changes is Shadows ExperimentDate:Purpose: To show the changes in a shadow’s shape, size and location.Materials: Flashlight; puppetPredict:(What do you think isgoing to happen?)Observe:1. When the puppet is in the middle of light source(What do you seehappening during theexperiment? Draw apictureforeachsituation.)2. When puppet is on the left of light source3. When puppet is on the right of light source4. When puppet is closer to the light source

5. When puppet is farther from the light sourceExplain:(What happened andwhy do you think ithappened?Anytheories?)Extension: Using your knowledge from this experiment with shadows,draw where the shadow of the house would be at each time of the day.

The Path of Light ExperimentDate:Purpose: To show how light travels.Materials: two pieces of bristol board; flashlight; modeling clay;scissors; mirrorsPredict:(What do youthink is going tohappen?)Observe:1. Path of light with bristol boards(What do you seehappening duringthe experiment?Draw a pictureforeachsituation.)2. Path of light when shone into a mirrorExplain:(What happenedand why do youthinkithappened? Anytheories?)

Reflective Properties of Different Shapes and Textures ExperimentDate:Purpose: To observe the reflective properties of different shapes andtextures.Materials: Flashlight; mirror; flat foil; crumpled foil; white paper;coloured paper; spoonPredict:(What do youthink is going tohappen?)Observe:1. Mirror(What do yousee happeningduringtheexperiment?Draw a pictureforeachsituation.)2. Flat foil3. Crumpled foil4. White paper

5. Coloured paper6. spoonExplain:(What happenedand why do youthinkithappened? Anytheories?)

Refractive properties of materials and shapes ExperimentDate:Purpose: To observe the refractive properties of materials and shapesMaterials: Drinking glass; ruler; pencil; prism; flashlight; sheet withprint on it; jar; water pitcher (or anything that holds enough water);water dropper; overhead transparency; waterPredict:Station #1:(What do you thinkisgoingtohappen?)Observe:(What do you seehappening duringtheexperiment?Draw a picture foreach situation.)Predict:Station #2:(What do you thinkisgoingtohappen?)Observe:(What do you seehappening duringtheexperiment?Draw a picture foreach situation.)Predict:(What do you thinkisgoingtohappen?)Observe:(What do you seehappening duringtheexperiment?Draw a picture foreach situation.)Station #3:

Predict:Station #4:(What do you thinkisgoingtohappen?)Observe:(What do you seehappening duringtheexperiment?Draw a picture foreach situation.)Explain:(What happenedand why do youthink it happened?Any theories?)Extension: Using your knowledge from this experiment on refraction, isthere any optical devices that we use today that uses these properties ofrefraction?.

Light and Optical DevicesDate:Purpose: To examine and compare how light interacts with differentoptical devices.Materials: Kaleidoscopes; reading glasses; periscopes; magnifyingglassesPredict:(What do youthink is going glassesPeriscopesMagnifyingglassesExplain:(What happenedand why do youthink it happened?Any theories?)What property of light was used in each of the optical devices?1. Kaleidoscopes:2. Reading glasses:3. Periscopes:4. Magnifying glasses:

Creating Optical DevicesDate:Purpose: To create your own optical device that performs a specificfunction.Materials:The Optical device that I created was:My Drawing of my optical device:The function that this optical device performs is.The property of light that it uses is.

Science Journal: Grade 4 Light Unit Name: _ Natural Vs. Artificial Light Date: _ Light that occurs in nature is natural light. Light that is created by people, and does not occur naturally is artificial light. Artificial Light Natural Light . In the Chart are objects of sources of light. .

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