AAM Q14&15

Question 1

What is a chemical property?

Answer 1

a characteristic of a substance that can’t be observed w/out altering the substance’s chemical composition

Question 2

What happens to a substance when it undergos a chemical change?

Answer 2

it changes its identity (new chemical formula)

Question 3

What is a chemical change?

Answer 3

the change of one substance into a differant substance(s) ex: burning paper

Question 4

What are some chemical changes?

Answer 4

• reacts to O2
• flammability
• photosnesitivity (reacts w/ light)
• reacts w/ acid

Question 5

What provides evidence that there is a chemical change? (8)

Answer 5

• explodes
• change in color*
• new odor (gas)
• new soild made
• new taste
• flammable
• releases energy (sound, fire, light, heat)
• absorbes energy (cooking)

Question 6

Can chemical changes be reversed?

Answer 6

no

Question 7

How long do chemical changes take?

Answer 7

they can be imidiate or happen over a long amount of time

Question 8

Are taste and smell a chemical property?

Answer 8

these are both chemical (smell and state are both chemical reactions) and physical

Question 9

How can you tell is it’s a new substance?

Answer 9

looks differanst, behaves differantly, new chemical formula