Look at this. A torch, a mirror, a glass of water, a coin, and a magnifier. Without touching anything yet: which of these could make light bounce, which could make something look bent, and which could make tiny print look huge?

Hands up one idea. We are going to test these today.

Today we will watch light do three things: bounce, bend, and make things look bigger.

First we will aim a torch beam with a mirror so the bright spot hits a paper X. Which of the three words is that?

In your group, talk for one minute. Share two quick predictions and a why for each.

• Mirror and torch: can you bounce the beam onto the paper X?
• Coin in the empty mug: will pouring water change what you see?

Be ready to share one prediction with the class.

Your group runs two main tests. Keep the torch beam away from faces. As you finish each test, jot one note or number on your Investigation Journal page before you move on.

1. Bounce. Prop one mirror. Shine the torch at it. Tip the mirror until the bright spot hits the paper X.
2. Bend. Stand a pencil in your glass of water and look from the side. Then watch the coin demo at the front. Keep your head still while water is poured. What do you notice?
3. Bigger. Look at the tiny print with your eye only. Next look through the magnifier. Then look through one rounded water drop on the clear plastic. For each lens, hold a ruler beside the letter, or count how many ordinary letters stack as tall as the magnified one. Write a whole number: about 2 times, 3 times or 4 times bigger.