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3. Look at the pictures. Use the first conditional and the corresponding ideas to write about these popular experiments.

1. If you add baking soda to vinegar, gas will fill the balloon with air.

2. If you drop raisins into a fizzy drink, the raisins will move up and down.

3. If you rub a balloon on your hair and hold it close to pieces of paper, they will jump towards the balloon.

4. If you put a peeled egg on a hot bottle, the egg will slip into the bottle.

5. If you spray hairspray over hot water in a jar and place the lid with ice on top, a cloud will form inside the jar.

6. If you write a message with lemon juice on paper and hold it over a light bulb, it will reveal a hidden message.