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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
Do the densities and boiling/melting points for the group 0 elements increase or decrease going down the group
Increase
26
Does reactivity increase or decrease for the group 0 elements going down the group
Increases
27
Where do noble gasses come from
All noble gasses come from the atmosphere mixed with other gasses.
28
What is a mixture
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
29
What is a compound
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.
30
How can you tell of a substance is pure
A pure substance has a sharp melting point
31
What is a solution
A mixture of liquid with a solid or gass
32
What is a solvent
A substance that can dissolve other substances
33
What is a solute
A solute is what gets dissolved by the solvent
34
What is solubility
The mass of a solute that can dissolve in 100 grams of water to make a saturated solution
35
What is a saturated solution
A solution becomes saturated when it can no longer dissolve any more of a substance
36
Can a solvent dissolve more of a solute if the solvent is warmer
Yes
37
What is filtration
Filtration is when an insoluble solid is separated from a liquid
38
What is residue
The residue is the substance that doesn't fit through the filter
39
What is the filtrate
The filtrate is the substance that passes through the filter
40
What is distillation
Distillation is a process that uses evaporation and condensation to obtain a solvent
41
What is evaporation
Evaporation is a process that involves heating a solvent to obtain the solute
42
Name four layers of the earth
Crust Mantle Outer core Inner core
43
Name the layers of the atmosphere
Troposphere | Atmosphere
44
Name the six most common elements in the earths crust
``` Oxygen Silicon Aluminium Calcium Iron Sodium ```
45
What is the atmosphere made up of
78% nitrogen 21% oxygen 1% argon 0.04% carbon dioxide
46
Give 2 reasons why carbon dioxide is a vital piece of the atmosphere
Without it the earth would be to cold and plants wouldn't be able to survive
47
What is respiration
The transfer of energy from food into plants and animals
48
Name a waist product of respiration
Carbon dioxide
49
What is combustion
When you burn fuels such as wood petrol and methane and carbon dioxide is produced
50
What is the equation for respiration
Glucose + oxygen --> carbon dioxide + water
51
What is an equation for combustion
Methane + oxygen --> carbon dioxide and water
52
What is photosynthesis
It is when plants use carbon dioxide and water to make glucose
53
What is the equation for photosynthesis
Water + carbon dioxide -----light-----> glucose + oxygen
54
Name 2 processes that add carbon dioxide to the atmosphere
Respiration | Combustion
55
State 2 processes that remove carbon dioxide from the atmosphere
Photosynthesis | Dissolving in the Oceans
56
What is the carbon cycle
The carbon cycle shows how carbon enters and leaves the atmosphere and how it enters and leaves the carbon stores
57
Name 6 carbon stores
``` The atmosphere The oceans Sedimentary rocks Fossil fuels Plants and animals Soil ```
58
How do humans let carbon dioxide into the atmosphere
Burning fossil fuels as fuels | Deforestation
59
What is climate change
Climate change is the long term change in weather patterns
60
What is global warming
The increase of average air temperatures
61
What are the impacts of climate change
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
Do like charges repel or attract
Repel
63
Do opposite charges attract or repel
They attract
64
Can electrons move
Yes
65
Can protons move
No
66
Can neutrons move
No
67
What is current
The amount of charge that passes through the circuit per second
68
What do you measure current in in
Amps
69
What do you measure current with
With an Ammeter
70
What is potential difference
The force of the push provided by the cell or battery
71
What is potential difference measured in
Volts
72
What is used to measure potential difference
Voltmeter
73
What are the 2 types of circuit
Series and parallel
74
What is resistance
Resistance is how easy and difficult it is for charge to pass through a wire
75
What is resistance measured in
It is measured in Ohms
76
Will a wire with a low resistance be a insulator or a conductor
A conductor
77
Is a wire a high resistance a conductor or insulator
An insulator
78
What is the repelling and attracting notes for magnets e.g north pole attracts ........
North pole attracts south pole North pole repels North pole South pole attracts North pole South pole repels South pole
79
Name the magnetic materials
Iron Steel Cobalt Nickel
80
How can you find out the shape of the magnetic field
With plotting compasses | With iron filings
81
What metal can you use to make a core
Iron
82
How can you make an electromagnet stronger
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
What are the two differences between electro magnets and permanent magnets
You can turn electro magnets on and off | You can enhance electron magnets to make them stronger than permanent magnets
84
What is a relay
A relay uses a small current in one circuit to operate a switch in another circuit
85
How does a simple motor work
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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