Evidence of Chemical Reactions/density review

Front

A precipitate is a ___________ that is deposited from a solution.

Back

solid

Front

Which of the following is NOT an example of a chemical change? burning match, a car rusting, baking a cake, melting ice

Back

melting ice

Front

What happens to air molecules when they are heated?

Back

they separate

Front

What is the volume of Object X?

Back

25.0 ml

Front

Which liquid is the least dense? oil, water, syrup, plastic bottle

Back

oil

Front

What is a chemical reaction?

Back

A process where substances (reactants) are transformed into new substances (products).

Front

What is density?

Back

Density is the mass of an object divided by its volume (Density = Mass/Volume).

Front

What is an example of a physical change?

Back

Melting ice is an example of a physical change.

Front

What is a common indicator of a chemical change?

Back

Color change, gas production, or formation of a precipitate.

Front

What happens to the density of a substance when it is heated?

Back

Generally, the density decreases as the substance expands.