Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

science > PATHWAYS REVISION PHYSICS > Flashcards

PATHWAYS REVISION PHYSICS Flashcards

You may prefer our related Brainscape-certified flashcards:
Biology 101 flashcards
1
Q

Name tne 10 forms of energ

A

Magnetic
Kinetic
Heat (thermal)
Light
Gravitational potential
Chemical
Sound
Elastic
Electric
Nuclear

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

What is the law of conservation of energy

A

Energy cannot be created or destroyed only transferred

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

What is the unit of energy

A

Joules

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

What is the formula for calculating efficiency

A

Efficiency = useful energy/total input energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

What is a fuel

A

A substance that contains a store of chemical or nuclear energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

What is a finite fuel

A

A non-renewable fuel that cannot be replaced at the rate that humans are using them (they will eventually run out)

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

What are disadvantages of coal

A

Produces pollution
Produces CO2 - contributes to global warming and climate changeW

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

What are some advantages of coal

A

Enough left to satisfy what we need for now
Electricity made by burning coal is reliable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

What are some disadvantages of oil and gas fuel

A

Produces pollution
Produces CO2 - contributes to global warming and climate change

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

What are some advantages of oil and gas fuel

A

Enough left to satisfy what we need for now
Electricity made by burning coal is reliable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

What are some disadvantages of nuclear energy

A

Produces very dangerous radioactive waste that lasts for thousands of years

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

What are some advantages of nuclear energy

A

It does not make CO2 and not not contribute to global warming and climate change
Electricity made by nuclear energy is reliable

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Name 5 renewable energy sources

A

Solar, Wind, water (tidal), geothermal, hydroelectric

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

As solar

A

Renewable, cheap, does not pollute, no CO2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

Ds of solar

A

Only works when sunny, not a very concentrated source of energy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

As water (tidal)

A

Renewable, does not pollute, no CO2, UK has lots of sea waves

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

Ds water (tidal)

A

Need huge numbers of turbines that take up space in the sea, very challenging engineering to build,A

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

As wind

A

Renewable, does not pollute, no CO2, UK has lots of wind

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Ds of wind

A

Only works when windy, turbines need to be turned off if too windy

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

As geothermal

A

Cheap, free, does not pollute no CO2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

Ds geothermal

A

only works when there are hot rocks near Earth’s surface,

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

What is geothermal energy

A

Hot rock in the ground have cold water pumped down to them, steam forms, is used to heat homes and run electricity power stations

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

What is tidal (water) energy

A

Up and down motion of sea waves is used to turn turbines that generate electricity

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

What is solar energy

A

Special materials turn sunlight into electricity. Or use sunlight to heat water

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

As hydroelectric energy

A

Cheap to run, does not pollute, no CO2

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

Ds hydroelectric enrgy

A

Expensive to build, only works where there are mountainous lakes

27
Q

What is hydroelectric energy

A

In mountainous places lakes high up - have holes drilled in the bottom (or DAMs!) to allow water out through pipes. The water moves very fast and turns turbines that generate electricity

28
Q

What is work done measured in

A

Joules

29
Q

Formula for calculating work done

A

Work = Force x distance

30
Q

What is work done

A

If you move an object and there is a force acting against you e.g. Friction, then you have done ‘work’

31
Q

What will happen if you do work on an object?

A

One of its energy stores will increase

32
Q

What is the formula that links power energy and time

A

Power = Energy / Time

33
Q

What are the units of Power

A

Watt (joules per second)

34
Q

Define biofuel

A

Fuels that are being grown or produced by living things

35
Q

Examples of biofuel

A

Grown –>
Suns light energy –>
Harvet –>
Burn –>
Chemical energy store –>
Heat + light –>
Replenish (grow back within human lifetime)

36
Q

What is an example of plant biofuel used for vehicle fuel

A

Sugar cane

37
Q

Describe arrangement of particles in solid

A

Vibrate around fixed position
Regular arrangement
Held in place by reasonably strong bonds

38
Q

Describe arrangement of particles in liquid

A

Randomly arranged
Can move over each other but remain touching
Some weak forces holding particles close

39
Q

Describe arrangement of particles in gas

A

Particles move around randomly at high speed
Large gaps between particles
Randomly arranged
Fill space they are in
Little to no forces of attraction between particles

40
Q

Define density

A

Mass per unit volume of a substance (mass/volume)
How compact a material is for the space it takes up

41
Q

Units of density?

A

gram/cm3 or kg/m3

42
Q

Apparatus used to measure volume of irregular object

A

Displacement can

43
Q

Define conduction

A

Movement of heat energy from a hotter region through a solid to a colder region

44
Q

How does conduction occur in non-metals

A

By particles vibrating and starting their neighbouring particles to vibrate

45
Q

Describe conduction in metals

A

2 ways:
1. Same as non-metals (particles vibrate and start neighbours to vibrate
2. Delocalised electrons move between the gaps in between particles to start other particles vibrating

46
Q

Are.metals good conductors

A

Yes

47
Q

What is freezing

A

State change liquid to solid

48
Q

What is melting

A

State change solid to liquid

49
Q

What is evaporating

A

State change liquid to gas

50
Q

What is condensing

A

State change gas to liquid

51
Q

What is sublimation

A

State change solid to gas

52
Q

What is depostion

A

State change gas to solid

53
Q

What states of matter does convection occur in?

A

Liquids and gases

54
Q

Explain convection

A

When you heat region of a gas/liquid
Particles move faster
Spaces between individual particles increases
This causes the density of the region being heated to decrease
Because liquids and gases can flow the warmer and less dense region will rise above denser cooler region
After rising to the top it cools down and sinks causing the cycle to repeat
This is a convection current

55
Q

Real life example of convection current

A

Radiators!
Metal radiator gets hot from hot water passing through it
Metal touches air around it and heats it
Hotter air rises and is replaced by cooler air - this also gets heated and rises, and so on

56
Q

What is a scalar quantity

A

Has size but not direction

57
Q

6 examples of scalar quantiites

A

Mass, length, height, any distance, energy, power

58
Q

Define vector quantity

A

Quantity has size and direction, represented by arrows

59
Q

6 examples of vector quantities

A

Weight, friction, all forces, displacement, velocity, acceleration,

60
Q

Formula that links weight, gravitational field strength and mass

A

Weight = mass x gravitational field strength

61
Q

Define acceleration

A

the change in velocity over time

62
Q

define velocity

A

the speed of something in a given direction

63
Q

Equation that links velocity, distance and time

A

Velocity = distance/time

64
Q

Formula for acceleration

A

Change in velocity/time

science (3 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions