Chemical Reactions

Which is an example of a chemical change?

• Burning wood

• Cooking food

• Rust on a car

• All of the above

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

• 4 atoms

• 1 atom

• 10 atoms

• 5 atoms

Tags

NGSS.MS-PS1-5

Which of the following are properties of matter?

• Magnetism

• Odor

• Color

• All the above

Tags

NGSS.MS-PS2-3

Which of the following help a chemical reaction to happen faster?

• Molecule

• Catalyst

• Atom

• Density

Tags

NGSS.HS-PS1-5

Is TNT exploding a physical or a chemical change?

• Physical

• Chemical

• Both physical and chemical

• Neither physical nor chemical

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

• Chemical engineer

• Pharmacist

• Materials scientist

• Medical doctor

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

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

• Color change

• Properties change

• Odor change

• All the above

Tags

NGSS.MS-PS1-2

NGSS.MS-PS1-5

______ is (are) made of more than one atom.

• A molecule

• Neutrons

• Protons

• An element

Tags

NGSS.MS-PS1-1

______ result(s) in no new substances.

• A physical change

• Physical and chemical changes

• A chemical change

• None of the above

Tags

NGSS.MS-PS1-2

Which is an example of a physical change?

• Burning wood

• Rust on a car

• Freezing water

• Cooking food

Tags

NGSS.MS-PS1-4