Unit 2 Test Review (4A, 4B, 4C, 4D and 6A)

1. Which process is a chemical change?

• Heating to boiling

• Dissolving in alcohol

• Burning in air

• Slicing into two pieces

At sea level, water boils at 100 °C. this is an example of a(n)

• Chemical property.

• Extensive property.

• Physical property.

• Chemical change.

The substances that are formed by a chemical change are called

• Reactants

• Products

• Substance

• Reaction

The state of matter in which a material has a definite volume and a definite shape is the

• Solid state

• Liquid state

• Gas state

• Plasma state

When atoms of two or more different elements are chemically bonded, the substance formed is a(n)

• Atom

• Element

• Compound

• Mixture

The Law of Conservation of Matter states that

• Matter can be created or destroyed.

• Matter is neither created nor destroyed.

• Matter can be created but never destroyed.

• Matter cannot be created but can be destroyed.

The smallest unit of matter that retains the properties of that matter is

• A molecule.

• A compound.

• A mixture.

• An atom.

Which statement best describes an element?

• Any combination of two or more atoms of different types

• A pure substance made up of only one kind of atom

• A substance containing only carbon atoms

• Any kind of crystal

Which of the following is an extensive property of matter?

• Volume

• Boiling point

• Density

• Melting point

Which of the following is an intensive property of matter?

• Energy content

• Density

• Volume

• Mass