Question

Which of the following is a physical change?

a candle burning
shredding a piece of paper
photosynthesis
a garden tool rusting

Answer 1

help me triple plz give medal

Answer 2

@waterineyes

Answer 3

Shredding a piece of paper, this is because all the other options are reactions taking place.
Which causes a change in the size or shape of it..
Look here for a better definition : http://chemistry.about.com/od/matter/a/10-Physical-Change-Examples.htm

Answer 4

ok thx

Answer 5

can i ask another plz

Answer 6

yh

Answer 7

Hydrochloric acid is used to produce fertilizers and dyes, to pickle and clean metal products, and as a reagent in the photographic and rubber industries. Which of the following is a chemical property of hydrochloric acid?

Liquid hydrochloric acid can vaporize into a gas at 48 degrees Celsius.
Hydrochloric acid reacts with zinc metal to produce hydrogen gas, zinc chloride, and heat.
Hydrochloric acid is soluble in water.
All of these are chemical properties of hydrochloric acid.

Answer 8

Thats a bit more difficult... hhahaa

Answer 9

so u dont know

Answer 10

Seems a bit like chemistry to me... I didn't have the privilege of studying that.

Answer 11

Nope, I don't. Sorry.

Answer 12

o man ok well wat do u think

Answer 13

im going with All of these....

Answer 14

I like B