Chemical Change

Question 1

Physical

Answer 1

E.g. . The five senses are used

Question 2

Chemical

Answer 2

E.g boiling point.

Question 3

Flammability

Answer 3

An indicator of how easily a substance catches fire

Question 4

reactivity

Answer 4

a measure of how likely a particular metal is to take part in a displacement reaction

Question 5

toxicity

Answer 5

the danger to your health caused when poisonous substances combine with chemicals

Question 6

Deposition

Answer 6

a thermodynamic process, a phase transition in which gas transforms into solid

Question 7

state

Answer 7

condition or phase of a substance

Question 8

chemical reaction

Answer 8

a chemical change in which one or more new chemical substances are produced

Question 9

products

Answer 9

new chemical substance that results from a chemical reaction

Question 10

reactants

Answer 10

chemical substance used up in a chemical reaction

Question 11

precipitate

Answer 11

solid product of a chemical reaction that does not dissolve in water

Question 12

reaction rate

Answer 12

speed at which a reaction takes place

Question 13

catalyst

Answer 13

chemical that helps to start or speed up a chemical reaction

Question 14

rusting

Answer 14

the corrosion of iron

Question 15

corrosion

Answer 15

a chemical reaction that wears away a metal

Question 16

rust

Answer 16

a brown substance formed when iron reacts with oxygen and water

Question 17

evaporates

Answer 17

change state from a liquid to a gas

Question 18

Sublimation

Answer 18

A process of solid to gas

Question 19

Melting

Answer 19

liquefied by heating

Question 20

Freezing

Answer 20

liquid turns into a solid when its temperature is lowered below its freezing point

Question 21

Solidification

Answer 21

known as freezing, is a phase change of matter that results in the production of a solid

Question 22

Solid

Answer 22

one of the three states of matter. i cannot be changed easily

Question 23

Liquid

Answer 23

fluid that conforms to the shape of its container

Question 24

Gas

Answer 24

sample of matter that conforms to the shape of a container in which it is held

Question 25

condensation

Answer 25

water which collects as droplets on a cold surface

Question 26

Desublimation

Answer 26

deposition is the phase change from gas directly to solid

Question 27

combustion

Answer 27

The process of combining with oxygen

Question 28

Burning

Answer 28

combining a substance with oxygen in a flame

Question 29

Oxidation

Answer 29

Combining something with oxygen

Question 30

Fossil fuel

Answer 30

substance, such as coal, oil and natural gas, that has formed from the remains of ancient organisms