Question

Which of the following causes a chemical change?

A. moving B. shattering C. burning D. melting

Answer 1

distinguish between the physical and the chemical.. is moving something chemical or physical?

Answer 2

ok cool so would it be A?

Answer 3

lol not at all. if you kick a rock and it moves, it is only physical.

Answer 4

i'm trying to help you reason this out, because it's common sense

Answer 5

oh ok so let me think

Answer 6

moving something is physical so?

Answer 7

ok let's walk through them

A. moving something, thats a positional change which is physical
B. Shattering something, if you drop a glass and it breaks, how did the substance (glass) change?
C. if you burn a log, are you converting it into something else?
D. if you take an ice cube and put it on the counter and it melts, how are you changing it? (think of the 3 physical states of matter)

Answer 8

ok so i get a and it is not a i get b but still am not sure c i am sorry but i got lost on what you said and d would the answer be d?

Answer 9

do you know what the 3 physical states of matter are?

Answer 10

not really i know what the three comman states of matter are but that does not help so sorry

Answer 11

so what are the 3 common states of matter

Answer 12

ok they are solid, liquid, and gas.

Answer 13

those are called physical states of matter (i guess common could work too)

so for D. how would melting an ice cube change the water?

Answer 14

oh sorry common is what i have on my notes but back to what you are asking melting an ice cube would not really change the water just keep it cold for a bit is that what you wanted?

Answer 15

they're called physical not common! haha i mean you're never gonna see (up-close) the "uncommon ones".

so wouldn't D be considered a change from one type of matter to another? ice to liquid?

Answer 16

ok i will tell my teacher because that is what he told me but now yes it would

Answer 17

okay so is that physical or chemical?

Answer 18

not sure can you remind me what each one could be related to?

Answer 19

going from solid to liquid or to gas constitutes a physical change. a chemical change constitutes breaking and/or forming bonds.

Answer 20

ok so it would be a physical change right?

Answer 21

yes definitely

Answer 22

now, burning something, are you breaking bonds?

is the wood still wood after you've burnt it?

Answer 23

so it would be D right

Answer 24

oh wait

Answer 25

no D, is physical remember?

Answer 26

right sorry just got that

Answer 27

now when you mean burn wood do you mean how long because wood only burn burns after a long time right?

Answer 28

ok i get it know it would be c because as the wood is burning there is a chemical change right?

Answer 29

and shattering and moving really are not any of them right

Answer 30

well it depends how dry it is right? but yeah, combustion (burning) is a chemical change because you're changing the subtance, breaking and forming bonds

Answer 31

great thanks for all your help i like how you helped me go over it and not just give me the answer thanks :)