Factors Affecting the Size and Shape of Shadows

Fill in the missing words with the correct answer.

Light travels in ___________ lines from a ___________ of light that bounces off an object.

• curve, source

• straight, source

Fill in the missing words with the correct answer.

We can see the object because the _______________ enters our eyes.

• fire

• wave

• light

Fill in the missing words with the correct answer.

Cardboard or metal are _____________ materials that light cannot pass through.

• transparent

• translucent

• opaque

Fill in the missing words with the correct answer.

_________ is a ___________ material which allows all light to pass through.

• Tissue paper, translucent

• Glass, transparent

• Tin foil, opaque

Fill in the missing words with the correct answer.

Tissue paper is ________________ material which let some light to pass through.

• translucent

• transparent

• opaque

Fill in the missing words with the correct answer.

When an object lock out the_______, a ___________ is formed.

• light, shadow

• shadow, light

• stone, light

Fill in the missing words with the correct answer.

Shadows are _____________ in the midday, and __________ the beginning and the end of day.

• longest, longest

• shortest, longest

• longest, shortest

Refer to the above diagram, which statement is correct?

• The closer the object and the screen, the bigger the shadow.

• The closer the object and the screen, the smaller the shadow.

• The closer the object and the screen, no changes on the shadow.

Refer to the above diagram, which statement is correct?

• The further the object and the screen, the bigger the shadow.

• The further the object and the screen, the smaller the shadow.

• The further the object and the screen, no changes on the shadow.

Refer to the above diagram, it shows the position of the source of light affect the size of shadow. This statement is true or false?

• False

• True