SOLUBLE AND INSOLUBLE SUBSTANCES

A child wants to make a lemonade drink by mixing water, sugar, and lemon juice. Which of the following statement is correct?

• The lemon juice will not dissolve in water.

• The sugar will dissolve, making the drink sweet.

• The sugar will stay at the bottom of the glass.

• The lemon juice will make the sugar float.

If you heat water and add more sugar, what will happen to the sugar compared to adding it to cold water?

• The sugar will dissolve faster and more sugar can dissolve.

• The sugar will not dissolve and will settle at the bottom.

• The sugar will evaporate with the water.

• The sugar will turn into solid pieces.

Farmers often need to mix fertilizers with water to help plants grow. Why is it important to know if the fertilizer is soluble?

• So the fertilizer dissolves and can be absorbed by the plants.

• So the fertilizer can be filtered out of the soil.

• So the fertilizer will stay at the surface of the soil.

• So the fertilizer turns into a gas when applied.

Why do chefs need to know which substances are soluble or insoluble when preparing food?

• To make sure they add the right amount of water.

• To know which ingredients will dissolve and which will not.

• To ensure the food changes color when cooked.

• To avoid using hot water when cooking.

How can you tell if a substance is insoluble in water?

• The substance dissolves completely.

• The substance sinks to the bottom or floats without dissolving.

• The water changes color.

• The substance disappears completely in the water.