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Science > Year 8 End Of Year Revision > Flashcards

Year 8 End Of Year Revision Flashcards

1
Q

Which side f the periodic table are the MEATALS

A

The left side

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2
Q

Does boiling points, melting points and density increase or decrease going down the group for non-metals

A

Increases

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3
Q

What are groups

A

The vertical columns in the periodic table

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4
Q

What are periods

A

The horizontal groups in the periodic table

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5
Q

Name the group 1 elements

A 
Lithium 
Sodium 
Potassium 
 Rubidium 
 Caesium 
Francium
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6
Q

Do the group 1 elements have high densities and boiling/melting points compared to other metals

A

No

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7
Q

Do the the group 1 elements have vigorous reactions with water

A

Yes

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8
Q

What are the properties of a metal

A 
Good conductor of electricity 
Good conductor of heat
Shiny
Malleable (can be easily bent or shaped)
Ductile (can be pulled into wires)
Sonorous
High density for its size
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9
Q

What are the properties of a non-metal

A 
Bad conductor of electricity
Bad conductor of heat 
Dull
Brittle 
Not sonorous 
Have a low density for there size
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10
Q

What happens when group one elements react with water

A

It produces hydrogen and a alkaline solution

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11
Q

Potassium+water–>

A

Potassium + water –> hydrogen + potassium hydroxide

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12
Q

Do densities and boiling/melting points increase or decrease going down the groups from top the bottom for metals

A

Decreases

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13
Q

Does reactivity for group 1 increase or decrease from top to bottom

A

It increases

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14
Q

Name the group 7 elements

A 
Fluorine
Chlorine
Bromine 
Iodine
Astatine
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15
Q

Do densities and melting/ boiling points increase or decrease from top to bottom for group 7

A

They increase

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16
Q

Name an element that all group 7 elements vigorously react with

A

Iron

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17
Q

Iron + chlorine –>

A

Iron + chlorine –> iron chloride

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18
Q

What are displacement reactions

A

Displacement reaction is a chemical reaction in which a more reactive element displaces a less reactive element from its compound

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19
Q

Potassium bromide + chloride –>

A

Potassium bromide + chlorine –> potassium chloride + bromine

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20
Q

What is another name for the group 7 elements

A

The halogens

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21
Q

What is another name for the group 1 metals

A

The alkaline metals

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22
Q

What is another name for the group zero elements

A

The noble gasses

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23
Q

Name the group 0 elements

A 
Helium
Neon
Krypton
Argon 
Xenon
Radon
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24
Q

Are group 0 gasses reactive compared to other elements

A

No

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25
Q

Do the densities and boiling/melting points for the group 0 elements increase or decrease going down the group

A

Increase

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26
Q

Does reactivity increase or decrease for the group 0 elements going down the group

A

Increases

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27
Q

Where do noble gasses come from

A

All noble gasses come from the atmosphere mixed with other gasses.

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28
Q

What is a mixture

A

A mixture is when a number of elements are together in one place but not chemically joined together the individual elements keep there properties and you can change the amounts of each element. You wouldn’t need a chemical reaction to separate them

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29
Q

What is a compound

A

A compound is when the elements are chemically joined together the elements individual properties change and the relative amount of each element can not change and you would need a chemical reaction to separate them.

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30
Q

How can you tell of a substance is pure

A

A pure substance has a sharp melting point

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31
Q

What is a solution

A

A mixture of liquid with a solid or gass

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32
Q

What is a solvent

A

A substance that can dissolve other substances

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33
Q

What is a solute

A

A solute is what gets dissolved by the solvent

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34
Q

What is solubility

A

The mass of a solute that can dissolve in 100 grams of water to make a saturated solution

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35
Q

What is a saturated solution

A

A solution becomes saturated when it can no longer dissolve any more of a substance

36
Q

Can a solvent dissolve more of a solute if the solvent is warmer

A

Yes

37
Q

What is filtration

A

Filtration is when an insoluble solid is separated from a liquid

38
Q

What is residue

A

The residue is the substance that doesn’t fit through the filter

39
Q

What is the filtrate

A

The filtrate is the substance that passes through the filter

40
Q

What is distillation

A

Distillation is a process that uses evaporation and condensation to obtain a solvent

41
Q

What is evaporation

A

Evaporation is a process that involves heating a solvent to obtain the solute

42
Q

Name four layers of the earth

A

Crust
Mantle
Outer core
Inner core

43
Q

Name the layers of the atmosphere

A

Troposphere

Atmosphere

44
Q

Name the six most common elements in the earths crust

A 
Oxygen
Silicon 
Aluminium 
Calcium 
Iron 
Sodium
45
Q

What is the atmosphere made up of

A

78% nitrogen
21% oxygen
1% argon
0.04% carbon dioxide

46
Q

Give 2 reasons why carbon dioxide is a vital piece of the atmosphere

A

Without it the earth would be to cold and plants wouldn’t be able to survive

47
Q

What is respiration

A

The transfer of energy from food into plants and animals

48
Q

Name a waist product of respiration

A

Carbon dioxide

49
Q

What is combustion

A

When you burn fuels such as wood petrol and methane and carbon dioxide is produced

50
Q

What is the equation for respiration

A

Glucose + oxygen –> carbon dioxide + water

51
Q

What is an equation for combustion

A

Methane + oxygen –> carbon dioxide and water

52
Q

What is photosynthesis

A

It is when plants use carbon dioxide and water to make glucose

53
Q

What is the equation for photosynthesis

A

Water + carbon dioxide —–light—–> glucose + oxygen

54
Q

Name 2 processes that add carbon dioxide to the atmosphere

A

Respiration

Combustion

55
Q

State 2 processes that remove carbon dioxide from the atmosphere

A

Photosynthesis

Dissolving in the Oceans

56
Q

What is the carbon cycle

A

The carbon cycle shows how carbon enters and leaves the atmosphere and how it enters and leaves the carbon stores

57
Q

Name 6 carbon stores

A 
The atmosphere
The oceans
Sedimentary rocks 
Fossil fuels 
Plants and animals 
Soil
58
Q

How do humans let carbon dioxide into the atmosphere

A

Burning fossil fuels as fuels

Deforestation

59
Q

What is climate change

A

Climate change is the long term change in weather patterns

60
Q

What is global warming

A

The increase of average air temperatures

61
Q

What are the impacts of climate change

A

Melting the polar ice caps causing sea levels to rise and flood low lying coasts

It would cause more droughts, heat waves and and heavier rain fall

62
Q

Do like charges repel or attract

A

Repel

63
Q

Do opposite charges attract or repel

A

They attract

64
Q

Can electrons move

A

Yes

65
Q

Can protons move

A

No

66
Q

Can neutrons move

A

No

67
Q

What is current

A

The amount of charge that passes through the circuit per second

68
Q

What do you measure current in in

A

Amps

69
Q

What do you measure current with

A

With an Ammeter

70
Q

What is potential difference

A

The force of the push provided by the cell or battery

71
Q

What is potential difference measured in

A

Volts

72
Q

What is used to measure potential difference

A

Voltmeter

73
Q

What are the 2 types of circuit

A

Series and parallel

74
Q

What is resistance

A

Resistance is how easy and difficult it is for charge to pass through a wire

75
Q

What is resistance measured in

A

It is measured in Ohms

76
Q

Will a wire with a low resistance be a insulator or a conductor

A

A conductor

77
Q

Is a wire a high resistance a conductor or insulator

A

An insulator

78
Q

What is the repelling and attracting notes for magnets e.g north pole attracts ……..

A

North pole attracts south pole
North pole repels North pole
South pole attracts North pole
South pole repels South pole

79
Q

Name the magnetic materials

A

Iron
Steel
Cobalt
Nickel

80
Q

How can you find out the shape of the magnetic field

A

With plotting compasses

With iron filings

81
Q

What metal can you use to make a core

A

Iron

82
Q

How can you make an electromagnet stronger

A

By making more loops with the wire
By having a core at the centre of the wire
By adding a larger amount of current through the wire

83
Q

What are the two differences between electro magnets and permanent magnets

A

You can turn electro magnets on and off

You can enhance electron magnets to make them stronger than permanent magnets

84
Q

What is a relay

A

A relay uses a small current in one circuit to operate a switch in another circuit

85
Q

How does a simple motor work

A

When you attach the coil to cell an electric current is passed through the coil and makes the coil an electro magnet. The forces between the magnets and the coil make the coil spin

Science (1 decks)

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