Exam Flashcards

1
Q

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

A

Ozone Layer

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2
Q

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

A

Fossil Fuels

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3
Q

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

A

biosphere

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4
Q

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

A

mantle

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5
Q

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

A

subduction

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6
Q

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

A

convection current

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7
Q

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

A

Stratosphere

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8
Q

molten rock

A

magma

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9
Q

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

A

greenhouse effect

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10
Q

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

A

faults

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11
Q

the term used to describe motion which is unchanging

A

uniform

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12
Q

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

A

interia

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13
Q

the ability of an object to do work

A

energy

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14
Q

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

A

Power

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15
Q

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

A

artery

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16
Q

the force of gravity acting on a mass

A

weight

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17
Q

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

A

net force

18
Q

a fundamental force of attraction between objects with mass

A

gravity

19
Q

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

A

friction

20
Q

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

A

balanced

21
Q

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

A

conversation of energy

22
Q

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

A

natural selection

23
Q

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

A

chromosome

24
Q

A feature that helps an organism survive

A

adaptation

25
Q

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

A

DNA profiling

26
Q

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

A

Nucleus

27
Q

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

A

Gene

28
Q

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

A

DNA

29
Q

The branch of biology that studies heredity and variations in organisms

A

Genetics

30
Q

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

A

Mass number

31
Q

A positively charged ion, formed by losing electrons

A

Cations

32
Q

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

A

Electrons

33
Q

A scale to measure acid or base strength

A

Ph scale

34
Q

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

A

Naturalisation

35
Q

A substance made up of only one type of atom

A

Element

36
Q

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

A

Litmus

37
Q

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

A

Compound

38
Q

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

A

Ions

39
Q

Material that slows down or resists the flow of current

A

Conductor

40
Q

The law that states that voltage = current x resistance

A

Ohms law

41
Q

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

A

Independent variable