Y8 - Terms

Question 1

Combustion

Answer 1

Another name for something burning

Question 2

Oxidation

Answer 2

A reaction between a metal and oxygen that forms a metal oxide

Question 3

Complete combustion

Answer 3

When something fully combusts

Question 4

Incomplete combustion

Answer 4

When there is not enough oxygen for the fuel to fully combust

Question 5

Cobalt chloride paper

Answer 5

Substance that turns pink in the presence of water

Question 6

Limewater

Answer 6

Substance that goes cloudy in the presence of carbon dioxide

Question 7

Independent variable

Answer 7

The variable you change during an experiment

Question 8

Dependent Variable

Answer 8

The variable you measure during an experiment

Question 9

Controlled variable

Answer 9

The variable you keep the same during an experiment

Question 10

Atom

Answer 10

The smallest part of a chemical element that can exist

Question 11

Element

Answer 11

One of more than a hundred substances that cannot be broken down into simpler substances

Question 12

Compound

Answer 12

A thing that is composed of two or more separate elements (Chemically bonded together)

Question 13

Mixture

Answer 13

A substance made by mixing other substances together (Not chemically bonded together)

Question 14

Matter

Answer 14

A substance made up of various types of particles that occupies a physical space

Question 15

Chemical Change

Answer 15

Not easily reversed, New product(s) formed, reactants used up, often heat/sound occurs. E.g. - Wood burning

Question 16

Physical Change

Answer 16

Easily reversed, no new products, often just a change in state. E.g. - Ice melting

Question 17

Valance

Answer 17

The number of bonds an atom can make