Physical Science Concepts in Action Ch. 2 quiz

Which of these substances is NOT an element?

• water

• hydrogen

• aluminum

• iron

Tap water is

• an element

• a compound

• a substance

• a mixture

When a homemade oil-and-vinegar salad dressing is left standing, it separates into layers. The salad dressing is a

• solution.

• suspension.

• colloid.

• compound

Which of the following is not an example of a physical property?

• density

• flammability

• hardness

• melting point

Which material is a poor conductor of heat?

• iron

• silver

• wood

• copper

A material that can be hit without shattering is

• viscous.

• flammable.

• malleable.

• hard.

Which action involves a chemical change?

• making ice cubes

• adding sugar to tea

• cutting wrapping paper

• baking a cake

A substance that has little tendency to change into other substances is said to have low

• reactivity.

• density.

• viscosity.

• conductivity.

Formation of a precipitate is usually evidence of

• the separation of a mixture.

• a chemical change.

• the formation of a mixture.

• a physical change

What is the difference between an element and a compound?