Exam

Question 1

A layer of gas in the stratosphere which absorbs UVB and UVC, protecting life on earth from these harmful rays

Answer 1

Ozone Layer

Question 2

A source of energy, such as oil, which was once the remains of living things but changed due to heat and pressure over time

Answer 2

Fossil Fuels

Question 3

the part of the earths surface and atmosphere where biological organism are able to live

Answer 3

biosphere

Question 4

The semi molten layer of earth surrounding the core and underneath the crust

Answer 4

mantle

Question 5

where one tectonic plate is diving below another, often leading to the formation of fold mountains and volcanoes

Answer 5

subduction

Question 6

Movement caused by hotter particles rising due to their lower density than the cooler particles in the same medium

Answer 6

convection current

Question 7

the layer of the atmosphere from 12-50km above earths surface, which contains the ozone layer

Answer 7

Stratosphere

Question 8

molten rock

Answer 8

magma

Question 9

the absorption of suns heat by the gases in the earths atmosphere such as carbon dioxide and methane

Answer 9

greenhouse effect

Question 10

a crack between sections of crust, where there is often movement during earthquakes

Answer 10

faults

Question 11

the term used to describe motion which is unchanging

Answer 11

uniform

Question 12

the resistance of an object to changes in its speed and direction

Answer 12

interia

Question 13

the ability of an object to do work

Answer 13

energy

Question 14

the rate at which work is done (or at which energy is transferred or transformed)

Answer 14

Power

Question 15

a major blood vessel which carries blood away from the heart to the rest of the body

Answer 15

artery

Question 16

the force of gravity acting on a mass

Answer 16

weight

Question 17

the single force that represents all the forces acting on a body

Answer 17

net force

Question 18

a fundamental force of attraction between objects with mass

Answer 18

gravity

Question 19

a force which opposes motion it acts when the surfaces of two bodies slide over one another

Answer 19

friction

Question 20

the term used to describe the forces on an object when the net force is zero

Answer 20

balanced

Question 21

the scientific law which states that energy can never be created nor destroyed

Answer 21

conversation of energy

Question 22

a process that drives evolution, where traits that give an organism

Answer 22

natural selection

Question 23

a structure found in cells that is made of DNA and carries the cell’s genetic information

Answer 23

chromosome

Question 24

A feature that helps an organism survive

Answer 24

adaptation

Question 25

The process of analysing an organism DNA for the purpose of identification. Sometimes called DNA fingerprinting

Answer 25

DNA profiling

Question 26

The central part of a cell where the chromosomes are stored and form where the cell is controlled

Answer 26

Nucleus

Question 27

A section of DNA that gives an instruction-codes for a characteristic

Answer 27

Gene

Question 28

Deoxyribonucleic acid, the chemical instruction for living things, mace up of the four bases adenine, thymine,cystosine, and guanine

Answer 28

DNA

Question 29

The branch of biology that studies heredity and variations in organisms

Answer 29

Genetics

Question 30

The total number of protons and neutrons that make up the nucleus of a particular atom

Answer 30

Mass number

Question 31

A positively charged ion, formed by losing electrons

Answer 31

Cations

Question 32

A sub atomic particle which is found outside the nucleus and has a negative charge

Answer 32

Electrons

Question 33

A scale to measure acid or base strength

Answer 33

Ph scale

Question 34

The name given to the reaction between an acid and a vase

Answer 34

Naturalisation

Question 35

A substance made up of only one type of atom

Answer 35

Element

Question 36

A chemical indicator that shows if a substance is acidic or basic by turning red or blue

Answer 36

Litmus

Question 37

A substance made up of more than one type of atom chemically bound together

Answer 37

Compound

Question 38

An atom (or groups of atoms) that has become charged by losing or gaining electrons

Answer 38

Ions

Question 39

Material that slows down or resists the flow of current

Answer 39

Conductor

Question 40

The law that states that voltage = current x resistance

Answer 40

Ohms law

Question 41

The variable changed on purpose in an experiment all other should be kept the same

Answer 41

Independent variable