2 Complete the dialogue with words and phrases from the box. isn't salt water dissolve happens floats experiment put air A: Look at my ¹ experiment ! This is fresh water and this is a fresh egg. B: What 2 if you 3 the egg in the water? A: It sinks. Look! 4 fresh? B: And what happens if the egg A: It floats. That's because it has 5 in it. ... Now I'm adding salt to the water I stir it to make the salt 6 B: The fresh egg 7 Now put the fresh egg in. ! So 8 helps things to float? A: Yes. That's why it's easier for us to float in the sea than in a swimming pool.