MATTER/CHEMICAL CHANGES IN MATTER

Question 1

What is matter

Answer 1

Has mass/Takes up space (Volume)

Question 2

what are mixtures classified as

Answer 2

Homogeneous and heterogeneous mixtures

Question 3

Heterogenous

Answer 3

2 or more phases

Question 4

Homogeneous/solutions

Answer 4

have one phase

Question 5

Mixtures contain 2 or more…….

Answer 5

Pure substances which can be separated through physical changes

Question 6

Pure substances are classified as

Answer 6

Elements and Compounds

Question 7

Pure substance…

Answer 7

have one phase

Question 8

Elements are represented by symbols

Answer 8

for Carbon(C) for Oxygen(O) occurs as 02

Question 9

Elements made of..

Answer 9

atoms which cannot be broken down

Question 10

Compounds represented by formulas

Answer 10

for salt(NaCl) for water(H20)

Question 11

Compounds are made of molecules which…..

Answer 11

cam be broken down into atoms through chemical changes

Question 12

what is HOFBrLNCl

Answer 12

All these elements are diatomic. Two atoms combine naturally

Question 13

Chemical Changes in matter are written as…

Answer 13

equations which show reactants changing into products

Question 14

Chemical changes in matter examples

Answer 14

rust occurs when iron reacts with oxygen

Question 15

Chemical changes in matter are indicated by

Answer 15

Heat/Light, Precipitate, colour change different to reverse and gas formed.

Question 16

Gas formed such as…

Answer 16

Hydrogen,Oxygen(O2), Carbon Dioxide(CO2) and Water Vapour

Question 17

Hydrogen detected using a flame splint which

Answer 17

POPS

Question 18

Oxygen detected using a glowing splint which

Answer 18

Bust in flames

Question 19

Carbon Dioxide(CO2) detected using limewater which

Answer 19

Milky

Question 20

Water vapour detected cobalt chloride paper which

Answer 20

turns pink