Chemical Reactions

Front

Which observation(s) might be used as evidence that a chemical reaction occurred?

Back

Color change, Odor change, Properties change

Front

What is made of more than one atom?

Back

A molecule

Front

What results in no new substances?

Back

A physical change

Front

Which is an example of a physical change? Options: Burning wood, Freezing water, Rust on a car, Cooking food

Back

Freezing water

Front

Which is an example of a chemical change?

Back

All of the above (Burning wood, Rust on a car, Cooking food)

Front

If you start a chemical reaction with 5 atoms of helium, how many atoms will you have after?

Back

5 atoms

Front

Which of the following are properties of matter? Options: Magnetism, Color, Odor, All of the above

Back

All of the above

Front

Which of the following help a chemical reaction to happen faster? Options: Molecule, Atom, Catalyst, Density

Back

Catalyst

Front

Is TNT exploding a physical or chemical change?

Back

Chemical

Front

What kind of scientist forms new materials by studying chemical reactions?

Back

Materials scientist