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Question 1

Pendulum
Automobile
Battery
Barometer
Light bulb
Braille
Steam boat

Answer 1

Galileo
Karl Benz
Alessandro Volta
Evangelista Torricelli
T Edison
Louis Braille
Robert Fulton

Question 2

What type of object emits infrared radiation?
Relation temp and amount of infrared radiation
Name three gases that trap IR.
How does a PIR sensor work?
What is the best reflector of IR?
best at absorbing and emitting IR?

Answer 2

All objects emit infrared radiation.
The hotter the object, the more infrared
Water vapour, carbon dioxide and methane.
They work by detecting infrared radiation.
Light, shiny, smooth surfaces
Dark, Matt surfaces

Question 3

What are radio, micro and infrared radiation waves?

How fast to electromagnetic waves travel?

Answer 3

They are electromagnetic waves.

300,000,000 metres per second (ms^-1)

Question 4

What blocks UV rays from the Sun?

Answer 4

The Earth’s ozone layer.

Question 5

What electromagnetic wave doesn’t Earth’s atmosphere block?

Answer 5

Infrared Radiation

Question 6

Greenhouse Effect traps

Answer 6

IR

Question 7

Give one effect of the planet warming

Answer 7

Polar ice caps will melt causing the sea level to rise.

Question 8

Solid flow?
Fixed shape?
fixed volume?
Density?
Atoms in a solid do what?

Answer 8

It doesn't flow.
It has a fixed shape.
It has a fixed volume.
It has a high density.
vibrate about their position.

Question 9

Give the process of a liquid to a gas.
Give the process of a liquid to a solid.
Give the process of gas to liquid.
Give the process of solid to gas.
Give the process of solid to liquid.

Answer 9

Vaporisation
Solidification/Freezing
Condensation
Sublimation
Melting

Question 10

Give an example of sublimation.

Answer 10

Solid carbon dioxide i.e dry ice

Question 11

What state’s particles have the most kinetic energy?
Kinetic energy refers to?
Equation

Answer 11

Gas
Motion
.5 Mass speed 2

Question 12

material is the best conductor

What materials are the best insulators?

Answer 12

Metal

Wool and fibreglass

Question 13

How do electrons move in a metal?

Answer 13

Randomly

Question 14

What states does convection occur in?
The circulation of a
Caused by

Answer 14

Liquids and gases.
fluid
heating it.

Question 15

What is evaporation?

Answer 15

This is the change of state from liquid to gas.

Question 16

What is the unit of specific heat capacity?
The unit of energy.
The unit of force.
The unit of pressure.

Answer 16

Joules per kilogram
Joules
Newton
Pascal

Question 17

Change of velocity per second.

Answer 17

Acceleration

Question 18

current in a circuit that repeatedly reverses

AC changes direction how many times

Answer 18

AC

50 times a sec

Question 19

Angle between the reflected ray and normal

Answer 19

angle of reflection

Question 20

What is an atomic number?

Answer 20

Proton number

Question 21

The radio spectrum for communications.

Invented

Answer 21

Band

Guglielmo Marconi

Question 22

Constant amount of electricity generated by power stations.

Answer 22

Base load

Question 23

BB says created

Expanding?

Answer 23

created in a massive explosion

universe has been expanding ever since.

Question 24

A star that has faded out

and gone

Answer 24

Black dwarf

Cold

Question 25

Why can't you escape a black hole

Answer 25

Mass

Question 26

Camera used for

Answer 26

photographing

Question 27

What is a kilowatt?

Answer 27

1000 Watts

Question 28

Momentum equation

Answer 28

mass x velocity

Question 29

What can waves be used for?

Answer 29

Energy and information transfer.

Question 30

Transverse waves vibrate | Longitude waves vibrate

Answer 30

perpendicular | vibrates parallel

Question 31

What type of wave is an electromagnetic wave? | What type of wave is a sound wave?

Answer 31

Transverse | Longitude

Question 32

How fast do EM waves travel?

Answer 32

300,000,000 m/s

Question 33

vibrations of a longitudinal wave also known as?

Answer 33

Compressions

Question 34

number of waves that pass a point in one second. | What is the unit of frequency?

Answer 34

Frequency | Hertz

Question 35

The distance from one crest to another.

Answer 35

Wavelength

Question 36

What is a plane mirror?

Answer 36

A perfectly flat mirror.

Question 37

Diffraction what to waves | Refraction what to waves

Answer 37

spread of waves | change of direction of waves

Question 38

What is the range of human hearing? | speed of sound?

Answer 38

20-20,000 Hz | 343ms^1

Question 39

Sound waves reflected from a smooth, hard surface.

Answer 39

Echoes

Question 40

What determines the pitch of a note?

Answer 40

Frequency

Question 41

As the cyclist accelerate the.......... energy store in the cyclist’s body decreases and the.......... energy of the cyclist increases.

Answer 41

Chemical , kinetic

Question 42

The mass of the cyclist is 80 kg. The speed of the cyclist is 12 m/s. Calculate the kinetic energy of the cyclist.

Answer 42

5760 (J)

Question 43

12 squared | Energy measured in

Answer 43

144 | Joules

Question 44

change in thermal energy =

Answer 44

mass × specific heat capacity × temperature change

Question 45

uses the brakes, the bicycle | How is the internal energy of the particles in the brake pads affected by the increase in temperature?

Answer 45

Slows down | Increased

Question 46

Why might the filament inside a lamp melt when the lamp is first switched on? The normal current through the filament lamp is

Answer 46

Current higher than 1.5A 1.5A

Question 47

When the cyclist uses the brakes, the bicycle slows down. This causes the temperature of the brake pads to increase by 50 °C. The mass of the brake pads is 0.040 kg. The specific heat capacity of the material of the brake pads is 480 J/kg °C. Calculate the change in thermal energy of the brake pads.

Answer 47

960 (J)

Question 48

Power equation Resistance Energy transferred

Answer 48

potential difference × current potential difference/current charge flow × potential difference

Question 49

The lamp is connected to a 24 V power supply. The current through the lamp is 1.5 A. Calculate the power of the lamp.

Answer 49

36 watts

Question 50

Power measured in

Answer 50

Watts

Question 51

LED lamps are much more efficient than filament lamps. | What does this statement mean?

Answer 51

LED lamps waste a smaller proportion of the input energy than filament lamps

Question 52

Draw a diagram to show how 1.5 V cells should be connected together to give a potential difference of 4.5 V. Use the correct circuit symbol for a cell.

Answer 52

3 cells joined in series in correct | orientation

Question 53

Cell diagram

Answer 53

I i

Question 54

V12 Current 1.6 whats the resistance

Answer 54

7.5 ohm

Question 55

Resistors strength parallel, series

Answer 55

decrease, increase

Question 56

Measuring volume of a rock instrument How to measure volume of object

Answer 56

Measuring cylinder Intial place in final final volume – initial volume

Question 57

The volume of the piece of rock was 18.0 cm3 The student measured the mass of the piece of rock as 48.6 g. Calculate the density of the rock in g/cm3

Answer 57

2.70 (g/cm3)

Question 58

error that may have occurred when the student measured the | volume of the rock.

Answer 58

eye position when using | measuring cylinder

Question 59

During the process of nuclear fission a uranium........absorbs a........... Electromagnetic radiation is released in the form of............

Answer 59

nucleus neutron gamma rays

Question 60

The UK needs at least 25 000 000 kW of electrical power at any time. A nuclear power station has an electrical power output of 2 400 000 kW Calculate how many nuclear power stations are needed to provide 25 000 000 kW of electrical power.

Answer 60

25 000 000 / 2 400 000 11

Question 61

State two environmental issues caused by generating electricity using nuclear power stations.

Answer 61

``` waste is radioactive • waste has a long half-life • waste is toxic • waste needs to be buried • risk of catastrophic accidents • fuel is non-renewable ```

Question 62

Picture

Answer 62

Fuse LED Diode Risistor

Question 63

UK mains voltage

Answer 63

230volts AC

Question 64

The appliance is connected to the mains electrical supply. The mains potential difference is 230 V. Calculate the energy transferred when 13 C of charge flows through the appliance

Answer 64

2990 (J)

Question 65

equation that links charge flow, current and time

Answer 65

Q = It

Question 66

Time sym current Charge

Answer 66

T I Q