2.3 Dissolving

Does Rico's prediction correct?

• Yes

• No

Why did he stir the mixture of water and salt?

• Stirring the mixture causes the salt to dissolve faster.

• Stirring the mixture causes the water to dissolve faster.

If he can't see the salt in the mixture, how can he test if the salt is still there?

• He can freeze the mixture.

• He can taste the mixture.

If he is not allowed to taste the salt mixture, what else can he do to test if the salt is present in water?

• He can boil the mixture until all the water is gone leaving the salt behind.

• He can freeze the mixture until all the water is gone leaving the salt behind.

Can sugar dissolve in water?

• Yes

• No

Can lemonade powder dissolve in water?

• Yes

• No

Can fine sand dissolve in water?

• Yes

• No

Can vitamin C tablet dissolve in water?

• Yes

• No

Can iron fillings dissolve in water?

• Yes

• No

Can black pepper dissolve in water?

• Yes

• No