Modeling Matter Practice Test

Front

What is an emulsifier?

Back

An emulsifier is a substance that helps to mix two liquids that usually do not mix well, like oil and water, by attracting different kinds of molecules to stay mixed.

Front

Why do water and fat separate when mixed?

Back

Water and fat separate because they are more attracted to their own kind of molecule rather than to each other.

Front

What happens when gelatin is added to a mixture of water and fat?

Back

When gelatin is added to a mixture of water and fat, they mix together because they are both attracted to the gelatin.

Front

What is solubility?

Back

Solubility is the ability of a substance to dissolve in a solvent, such as how sugar dissolves in water.

Front

Why is solubility a useful property for identifying substances?

Back

Solubility is useful for identifying substances because different substances have different solubility levels in water, making it easier to distinguish between them.

Front

What does it mean when a substance is soluble in water?

Back

When a substance is soluble in water, it means that it can dissolve in water to form a solution.

Front

What is the difference between soluble and insoluble substances?

Back

Soluble substances can dissolve in a solvent, while insoluble substances do not dissolve and remain separate.

Front

Can you give an example of a soluble substance?

Back

An example of a soluble substance is sugar, which dissolves in water.

Front

Can you give an example of an insoluble substance?

Back

An example of an insoluble substance is sand, which does not dissolve in water.

Front

What role does temperature play in solubility?

Back

Temperature can affect solubility; generally, higher temperatures increase the solubility of solids in liquids.