Science Grade 3 - Chapter 4.1/4.2 - How Light Behaves

What are two reasons that make light energy important for living things?

• It allows us to see

• It helps plants to grow

• It makes objects look smaller

• It helps plants too see

Circle the word that means to bounce off a surface.

• refract

• reflect

• absorb

How does light travel? Pick the picture.

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Answer explanation

Light always travels in straight lines!

Light can pass through some objects.

a- Select the word used to describe when light bends as it travels from one material to another.

• disappear

• reflect

• refract

• absorb

In cold places, like in Iceland, people paint their houses black.

Why do people do this? Choose your answer.

• for houses to match the snow

• for houses to look bigger

• for houses to absorb light and warm-up

Which of the following are sources of light? Pick three pictures.

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The dark shape formed when an object blocks light is a

• shadow

• body

• lamp

• light source

Answer explanation

A shadow is a dark (real image) area where light from a light source is blocked by an opaque object.

Select the word that describes the objects that do not allow light to pass through them.

• translucent

• opaque

• transparent

Why can we see objects? Choose the answer.

All objects....

• reflect at least some light

• give off their own light

Select the word that describes the objects that allow part of the light to pass through them are

• translucent

• opaque

• transparent