Grade 2 · Unit 4: Light and dark

Darkness

What happens when there is no light at all?

No light, no seeing

We see things when light goes into our eyes. In complete darkness there is no light. So we cannot see anything at all!

Explorers carry torches and lamps because their eyes cannot see without light.

Dark is not black paint

At night it is dark because the Sun is not shining on our side of the Earth. Moonlight and stars give a little light.

In cities, bright street lights make it hard to see the stars.

Seeing in the dark

Owls and cats have big eyes. They see in very dim light. Bats use sound to find their way. But no animal can see in total darkness.

Owls also have amazing hearing. They can find a mouse in the dark just by listening.

Be seen at night

On dark roads, drivers may not see you. Wear light colours and a reflector. Carry a torch.

Reflective strips bounce car headlights straight back to the driver.

What I learnt

• I know that we need light to see.
• I know that darkness is the absence of light.
• I know how to be seen safely at night.