Modeling Matter End of Unit Assessment

Front

What is an emulsifier?

Back

An emulsifier is a substance that helps mix two liquids that normally do not mix, such as oil and water.

Front

How does an emulsifier work?

Back

It attracts two molecules together that do not normally mix.

Front

What are some examples of substances that dissolve in water?

Back

Salt and sugar are examples of substances that dissolve in water.

Front

Which substance will NOT dissolve in water: salt, sugar, pepper, or coffee?

Back

Pepper will NOT dissolve in water.

Front

Why do scientists create models?

Back

To help answer questions about the real world that are too small to be seen.

Front

What ingredient makes water and oil mix?

Back

Lecithin is the ingredient that makes water and oil mix.

Front

What is a model in science?

Back

A model is something scientists create to represent and understand real-world phenomena.

Front

What is matter?

Back

Matter is anything that has mass and takes up space.

Front

What is a mixture?

Back

A mixture is a combination of two or more substances that retain their individual properties.

Front

What is the difference between a solution and a mixture?

Back

A solution is a type of mixture where one substance is completely dissolved in another.