light and shadows - sapgrp.com

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P3/4 science

1. Which of the following gives out light on its own?

A. the sun C. lightningB. candlewax D. firework

(1) A and B only(2) A and C only(3) A, B and C only(4) A, C and D only ( )

2. Whichoneofthefollowingdoesnotreflectlight?

(1) a tennis ball(2) a bunsen burner(3) a giant star(4) a tripod stand ( )

3. Study the diagram below carefully.

Whenarayoflight,P,fallsonamirror,whichofthefollowingshowsthepathofthereflectedlight correctly?

(1) OA (3) OC(2) OB (4) OD ( )

4. Daniel is able to see the rainbow after a storm because .

(1) therainbowreflectslightintooureyes(2) the rainbow is very colourful(3) oureyesreflectlightintotherainbow(4) the rainbow gives out light on its own ( )

5. What is the difference between the surfaces of a sheet of sandpaper and a mirror?

(1) Thesandpaperreflectsmorelightthanthemirror.(2) The sandpaper absorbs more light than the mirror.(3) More images can be produced on the mirror than on the sandpaper.(4) Themirrorallowslessregularreflectionsonitthanthesandpaper. ()

mirrorO

PA

B

CD

Light And Shadows

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Taken from NaiL thoSe McQs! PriMary ScieNce LoWer BLock 3/4


P3/4 science

6. Which of the following sets of materials are put in the correct groups?

Allows all light to pass through

Allows some light to pass through

Allows no light to pass through

(1) orange juice thin cloth metal

(2) clay pond water wood

(3) clear glass tinted glass clay

(4) frosted plastic tracing paper wool ( )

7. Look at the diagram shown below.

Which is not a possible shadow of the cup and the stirring rod when light is shone at them?

(1) (2) (3) (4)

( )

stirring rod

porcelain cup

Light And Shadows

Answers: 1. 2 2. 3 3. 2 4. 1 5. 2 6. 3 7. 4

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P3/4 science

1. Study the diagram shown below.

Mandy studied the shadows of the coconut tree at different times in a day. She then recorded the different timings for the shadows at different parts of the day. Which one of the following rows shows the timings correctly?

A B C

(1) 9 pm 12 pm 4 am

(2) 10 am 12 am 5 pm

(3) 10 pm 1 pm 5 am

(4) 10 am 12 pm 5 pm( )

2. Studytheclassificationdiagrambelow.

Which of the following best represents W, X, Y and Z?

W X Y Z

(1) dough coffee air fog

(2) clay pot mud cardboard water

(3) tracing paper water frosted glass mist

(4) wooden ruler dough tracing paper haze ( )

A B C N

Light And Shadows

Objects

XW ZY

Do not allow light to pass through

Allow little light to pass through

Indefiniteshape

Definiteshape

Indefiniteshape

Definiteshape

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P3/4 science

3. Look at the picture shown below.

Four girls made comments about the shadow formed on the wall. Which girl(s) had made the correct comment(s)?

Abril : Theshadowisformedwhenitreflectslightintooureyes.Haley : The shadow is formed when an opaque object is placed in the path of the light.Janie : The shadow is formed as light rays cannot bend.Carla : The shadow is formed as it is not a matter.

(1) Abril only(2) Haley and Janie(3) Abril and Carla(4) Haley, Janie and Carla ( )

shadow

Light And Shadows

Answers: 1. 4 2. 4 3. 2

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P3/4 science

1. Why are we able to see the tap water in the glass even though it is colourless?

A. Thetapwaterreflectssomelightintooureyes.B. The tap water gives off its own light.C. The tap water allows some light to pass through.D. The tap water allows all light to pass through.

(1) A only (3) A and D only(2) B only (4) B and D only ( )

2. Study the diagram shown below carefully.

ObjectAhascastalightshadowontothefloor.WhichofthefollowingmaterialsisObjectAmost likely to be?

(1) frosted glass (3) plywood(2) clear plastic (4) sponge foam ( )

3. A frosted glass and a wooden cone are placed in line with each other. A torch is shonedirectly at both the objects and their shadows were cast onto the screen.

Which one of the following shadows would be seen on the screen?

(1) (2) (3) (4)

( )

Object A

lamp

Light And Shadows

torch woodencone

frostedglass

screen

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P3/4 science

4. A periscope can be used to spot objects which are not placed in our direct view. Which of thediagrams shows the light path in a periscope correctly?

(1) (3)

(2) (4)

( )

ball

mirror

mirror

ball

mirror

mirror

ball

mirror

mirror

ball

mirror

mirror

Light And Shadows

Answers: 1. 1 2. 1 3. 1 4. 3

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P3/4 science

1. A safety vest helps keep the workers who are working by the roadside safe. This is especiallyso during the nights.

Whichstatementaboutthereflectorfoundonthesafetyvestiscorrect?

(1) Thereflectorgivesoutheatenergyandkeepsthewearerwarm.(2) Thereflectorreflectslightandappearsbrightduringthenights.(3) Thereflectorgivesoutlightonitsownandhelpspreventtrafficaccidents.(4) Thereflectorprovideselectricitytothewearer. ()

2. Study the diagram below.

Marcuswantstoadmiretheflowerwhichisontheothersideofatallwall.However,heis not tall enough and has to rely on the mirrors, A, B, C and D, in the tube shown above. Whichmirror(s)willMarcusdependoninordertoseetheflower?

(1) A only(2) A and C only(3) B and D only(4) A, C and D only ( )

AB

C D

safety vest

reflector

Light And Shadows

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P3/4 science

3. Vera shone her torchlight at a bunch of grapes shown below.

What can Vera do to enlarge the shadow of the bunch of grapes on the screen?

A. Shift the grapes nearer to the torchlight. B. Shift the screen away from the grapes. C. Shift the screen closer to the grapes. D. Shift the torchlight further away from the grapes.

(1) A and B only (3) B and C only (2) A and C only (4) C and D only ( )

4. Colby wanted to use a data logger to measure the intensity of light passing through different types of liquid.

Which variable must be changed in this experiment in order for Colby to measure the amount of light passing through the different liquids?

(1) Amount of light passing through the liquid (2) Type of batteries in the torchlight (3) Type of liquid in the clear glass (4) Distance between the torchlight and the glass ( )

clear glass

liquid

light detector

dataloggertorchlight

torchlight

screen

bunch of grapes

Light And Shadows

Answers: 1. 2 2. 2 3. 1 4. 3

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light and shadows - sapgrp.com

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