Light Year 5

Donald said, "If a cat is in the middle of a room with no windows or light, you could still see the cat's eyes because they shine in the dark." Is this True or False?

• True

• False

Ralph said, "If a cat is placed in the middle of a room with no windows or light, it will still have a shadow." Is this True or False?

• True

• False

Which of the following is correct?

• Light travels in a straight line.

• Light travels from our eye to the object.

• Light heats up the air as it travels, brightening the molecules.

• Light travels through opaque objects.

Which of the following is the definition of transparent?

• A word to describe something that lets a lot of light through

• A word to describe something that absorbs light

• Something made when an object blocks light

• When light bounces off an object

Which of the following is the definition of translucent?

• A word to describe something that lets a lot of light through

• A word to describe something that absorbs light

• Something made when an object blocks light

• When light bounces off an object

• A word to describe something that lets some light through but not all

Which of the following is the definition of opaque?

• A word to describe something that lets a lot of light through

• A word to describe something that absorbs light

• Something made when an object blocks light

• When light bounces off an object

• A word to describe something that lets some light through but not all

Which of the following is the definition of a shadow?

• A word to describe something that lets a lot of light through

• A word to describe something that absorbs light

• Something made when an object blocks light

• When light bounces off an object

• A word to describe something that lets some light through but not all

Look at the picture. Which of the following most correctly explains what is happening?

• Some of the light from the torch is being blocked by the opaque object, casting a shadow on the wall.

• The torch is a light source and the opaque object is reflecting light on to the wall, casting a shadow.

• The opaque object allows some light through it, casting a shadow on the wall from the torch.

• The shadow on the wall is being cast by the light, which is refracting off the opaque object.

How does light help us see a tree?

• The light travels in a straight line from the sun, reflects off the tree and travels to our eye.

• Our eye sees the light which refracts from the tree, which is a light source.

• The sun is a light source which is a sphere so the light curves around the tree, allowing our eye to see it.

• The light spectrum has different colours and because the tree is rough, the light curves away to our eye.

What is NOT a normal use for transparent materials in real life?

• Used for windows on cars as light is allowed in but wind is stopped.

• Used for drinking glasses because it holds a liquid and allows you to see what is inside.

• Used for oven doors to allow you to see inside without the heating getting out.

• Used for bathroom windows to allow privacy by stopping most light getting through.