Grade 2 Science Review chapter 6 Light and Darkness

... helps us to see things around us.

... are things that give off light.

The ... is a light source that gives off heat and light that living things need.

... and other ... are light sources that we see in the sky.

At night, street ... are turned on.

Some animals like glow worms and ... give off their own light.

When it is ... , we cannot see.

Fire is also a light source. It may came from lit ... and burning ... .

We cannot ... things when there is no light.

... happens when there is no light.