Science Grade 9 Exam Review

Front 1

Physical Properties

Back 1

Matter is anything that has mass and takes up space

Front 2

Particle theory of matter

Back 2

• all matter is made up of tiny particles

• each pure substance has its own kind of particle which is different from the particles of other pure substances

• attract each other

• always moving

Move faster at a higher temperature

Front 3

Pure Substance

Back 3

One kind of particle

Front 4

Mixture

Back 4

More than one kind of particle

Front 5

Conductor

Back 5

Allows the movement of electrons

Front 6

Insulator

Back 6

Does not let the electrons flow through it easily

Front 7

Astronomical Distance

Back 7

Distance between Earth and the sun

Front 8

Types of energy

Back 8

Light heat sound

Front 9

Static electricity

Back 9

Imbalance of electrons on a surface

Front 10

Series circuit

Back 10

I circuit which provides one path for the electrons to move

Front 11

Parallel circuit

Back 11

A circuit that provides more than one path for electrons to move

Front 12

Fertilizers

Back 12

Most common way to replace lost nutrients on farmland

Front 13

Pesticides

Back 13

Poisons that kill pests

Front 14

Organic farming practices

Back 14

•No tillage farming- The ground is left undisturbed after harvest

• crop rotation- changing the crops planted on a certain area of land(reduce the amount of pesticides)

Front 15

Melting

Back 15

Changing from solid to liquid

Front 16

Solidification

Back 16

Liquid to a solid

Front 17

Condensation

Back 17

Changing from a gas to a liquid

Front 18

Evaporation

Back 18

Changing from a liquid to a gas

Front 19

Sublimation

Back 19

Changing from a solid to a gas

Front 20

Deposition

Back 20

Changing from gas to solid

Front 21

Alkali metals

Back 21

Group one. Low melting points that are soft. Extremely reactive

Front 22

Alkaline earth metals

Back 22

Group 2. Highly reactive but not as reactive as the alkali metals

Front 23

Noble gases

Back 23

Group 8. Odorless colorless gases at room temperature

Front 24

Types of pesticide

Back 24

Herbicides, insecticides, Rodenticides

Front 25

Electrolysis

Back 25

Separating a compound

Front 26

Hubbles law

Back 26

• each galaxy emits its own distinct spectrum of light

• light spectrum shift depending on whether the light source is moving or stationary

Front 27

Solution

Back 27

Uniform mixture which seems like there's only one substance

Front 28

Mechanical mixture

Back 28

Mixture is distinctive

Front 29

Isotope

Back 29

Form of an element that has same number of protons as the other atoms of that element but a different number of neutrons.

Front 30

Physical property

Back 30

Characteristic of a substance that can be observed and measured without changing the identity of the substance

Front 31

Qualitative

Back 31

Observed and described without measurement

Front 32

Quantitative

Back 32

Measured and described by a particular value

Front 33

Chemical property

Back 33

Describe the ability of a substance to react with another substance to form one or more new substances

Front 34

Ion

Back 34

Positive or negatively charged atoms or molecules to form when atoms lose or gain electrons

Front 35

Halogens

Back 35

Group 7. highly reactive and extremely corrosive.