Unit 1-2 Review

When something is a gas, its molecules...

• Are packed together very tightly

• Are spread far apart

If something has definite volume but NO definite shape, it is a...

• solid

• liquid

• gas

Mint chocolate chip ice cream is...

• an element

• a compound

• a homogeneous mixture

• a heterogeneous mixture

Strawberries are red. "Red" is a...

• physical property

• chemical property

Which of the following is a chemical change?

• sawing wood

• melting candle wax

• dissolving salt in water

• rusting

One substance reacting with another is a...

• chemical change

• physical change

The substance CH3COOH is...

• an element

• a compound

• a homogeneous mixture

• a heterogeneous mixture

Which of the following does not have definite (fixed) volume?

• solid

• liquid

• gas

An object has a mass of 16 g and a volume of 8 mL. What is the density?

(density = mass/volume)

• 1 g/mL

• 2 g/mL

• 24 g/mL

• 128 g/mL

The law of conservation of mass says that matter cannot be created nor destroyed, only...

• transformed

• disappeared

• vaporized

• blipped