Physical + Chemical Properties - Chapter 8

Question 1

physical properties

Answer 1

properties you can observe through, hearing, touching, smelling, tasting or seeing.

Question 2

chemical properties

Answer 2

properties that describe substances forming to make a new chemical, or substance breaking down into two or more substances

Question 3

chemical change

Answer 3

a change that results in a new substance being formed

Question 4

evaporate

Answer 4

liquid to gas

Question 5

state

Answer 5

condition of a substance

Question 6

physical changes

Answer 6

a change in shape, size or state

Question 7

chemical reaction

Answer 7

chemical change where a completely new substance is produced

Question 8

reactants

Answer 8

chemical substance used in a chemical reaction

Question 9

product

Answer 9

new substance that results from a chemical reaction

Question 10

reaction rate

Answer 10

speed when a reaction happens

Question 11

catalyst

Answer 11

chemicals that helps to speed up a chemical reaction

Question 12

enzymes

Answer 12

chemicals that speed up reactions

Question 13

rust

Answer 13

a brown substance that’s created when iron reacts with oxygen and water

Question 14

corrosion

Answer 14

chemical reaction that wears away a metal

Question 15

surface protection

Answer 15

coating over a metal surface to prevent corrosion

Question 16

galvanising

Answer 16

protecting a metal by covering it with a metal that will corrode first

Question 17

burning

Answer 17

combining a substance with oxgygen and a flame

Question 18

oxidation

Answer 18

chemical reaction involving the loss of electrons by a substance

Question 19

plastics

Answer 19

synthetic substance capable of being moulded

Question 20

natural fibres

Answer 20

fibres that form naturally, eg. wool and cotton