Unit 2: Matter Exam Review

What is the density of a sample of liquid that has a volume of 125 mL and a mass of 200g?

• 1.6 g/mL

• 75 g/mL

• 16 g/mL

• 0.625 g/mL

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

• freezing point

• density

• reactivity

• boiling point

A molecule of water (H₂O) is made from _____ combining two hydrogen atoms and one oxygen atom.

• physically

• ionically

• chemically

• thermally

Knowing the chemical properties of a substance will tell you how the substance

• reacts with other substances

• smells

• can be broken down into atoms

• looks

Which of the following results in a mixture?

• digesting food

• dissolving salt

• burning a log

• baking a cake

Which of the following is a physical change?

• evaporating

• dissolving

• bending

• all of the above

A substance that cannot be broken down into simpler substances is a(n)

• element

• compound

• mixture

• atom

Which of the following is an element?

• iron

• salt

• sand

• nylon

Which of the following is an example if a chemical change?

• ice melting

• a puddle of water evaporating

• paint fading

• pounding gold into a coin

Which of the following is an example of physical change?

• rusting iron

• dissolving salt in water

• burning wood into charcoal

• cooking an egg