OCR Combined Science B Papers 3 and 7 Automock

#1. Why is the total energy transferred to a kettle’s heating element, more than the total energy of the boiled water inside the kettle?

The total energy transferred to the heating element is difficult to measure and we probably made a mistake

The total energy of the water is less because a little bit of energy is destroyed each time it is moved between stores

Energy is transferred from the heating element to the rest of the kettle and to the environment

If you could accurately measure the movement of energy, you would always find that all of the energy is transferred. Energy cannot be created or destroyed, this is known as the Law of Conservation of Energy.

#2. Complete the sentence: Reaction time is the time between a ……. being detected and a ……..

Stimulus, response

Reaction, stimulus

Response, stimulus

Interaction, action

#3. How is fossil fuel usage changing as a percentage of total energy production worldwide?

falling

staying the same

rising

#4. What is this component?

#5. Is coal renewable?

partially

no

yes

#6. Calculate the acceleration of the object in the graph between 5 and 6 seconds.

20 m/s²

10 m/s²

1 m/s²

2 m/s²

This is a straight-line graph.

Calculate the gradient of a straight-line graph using the following:

y₂ – y₁ / x₂ – x₁

30-20/6-5 = 10m/s²

This is the same as a simpler version:

Rise/run

or vertical distance / horizontal distance

#7. True or false – electromagnetic waves can travel through a vacuum?

false

true

#8. What do we call energy that is stored inside atoms?

#9. What is the equation relating wave speed (v) distance (x) and time (t)?

v=xt

v = x/t

v = t/x

1

#10. What is happening to the speed of the object in the graph between 0 and 8 seconds?

Acceleration

Deceleration

No change

#11. What is acceleration?

Change in the rate of velocity

Change in the rate of displacement

Increase in distance

#12. What is the purpose of the earth wire in a plug?

Connects the appliance to the power supply

Provides a return path to the power supply from the appliance

Provides an alternative (low resistance) path for the current in the case of a fault

#13. What is this component?

#14. True or false – microwave radiation at certain frequencies could cause the internal heating of cells in our bodies?

false

true

#15. Acceleration is an increase in the rate of what?

magnitude

velocity

gravitational potential energy

#16. Which is the correct definition for renewable energy resources?

they are not replaced and are exhaustible

they are replaced and are inexhaustible

they are infinite

#17. Is velocity a vector or a scalar?

scalar

vector

#18. Which greek letter represents density?

V

m

ρ

#19. What is amplitude?

how far from the equilibrium point the wave has oscillated

the distance of one entire oscillation

the number of waves passing a point each second

the time taken for a full oscillation

the maximum displacement of a wave

#20. How can we upgrade our windows to reduce heat loss?

Replace with electrostatically repulsive glass

Upgrade to double or triple glazing

#21. Which theory do we use to describe states of matter?

Particle/Kinetic Theory

Particulatory Coherence Theory

Geometric Theory

#22. What is this Sankey Diagram showing?

What the ideal energy transfer looks like for a particular system

How internal combustion engines work

Inputs and outputs of energy and their forms, e.g. thermal energy

#23. What do we call energy that is stored in chemicals?

#24. What is the purpose of fuses and circuit breakers?

They act as a backup source of power in the case of a sudden, momentary loss of power

They hold the wires in place in a plug

They detect potentially dangerous changes in current and disconnect the power supply

#25. In transverse waves are the vibrations parallel or at right angles to the direction of wave travel?

right angles

parallel

#26. What is the function of a variable resistor?

measures potential difference

safety component which can break a faulty circuit

makes or breaks a circuit

releases light

provides a constant resistance

allows current to only flow one way

gives power to a circuit

measures current

two or more cells in a circuit

provides variable resistance

#27. Which form of radiation is least ionising?

alpha particles

beta particles

gamma rays

#28. Magnets have north and south poles – if two south poles are put close together what will happen?

nothing will happen

they will repel

they will attract

#29. If a car is moving but the forces are balanced – what will happen to the speed of the car?

will stay constant

will decelerate

will accelerate

#30. Calculate the force when an object changes its momentum by 2550 kg m/s in 5 seconds. Include the units for force in your answer.

#31. What is the longest wavelength of electromagnetic radiation

gamma rays

x-rays

infrared

microwaves

ultraviolet light

visible light

radiowaves

#32. Conventional current goes from:

Negative terminal to positive terminal

Positive terminal to negative terminal

#33. Which of the following is the correct equation for momentum?

momentum (kg m/s) = mass (kg) × velocity (m/s) [p=m×v]

momentum (kg m/s) = mass (kg) / velocity (m/s) [p=m/v]

momentum (kg m/s) = weight (N) × velocity (m/s) [p=w×v]

momentum (kg m/s) = mass (kg) × time (s) [p=m×t]

#34. Is geothermal renewable?

no

yes

partially

#35. Is oil a fossil fuel?

yes

partially

no

#36. Which of the following can be used to measure reaction times?

Select all that apply:

Computer programmes

Electric circuits

Newton meters

Thermometers

#37. Which device can you use to find the direction of a magnetic field?

An anemometer

A plotting compass

A potometer

#38. Why is it dangerous to connect a live and earth wire?

A very large current will flow which could start a fire from excess heat

The earth wire is connected to your neighbours and they will experience a power surge

When unused the neutral wire will melt and cause a fire

#39. What wavelength of the electromagnetic spectrum does a radiator glow at?

ultraviolet light

visible light

microwaves

gamma rays

x-rays

radiowaves

infrared

#40. Which of the following is an advantage of crude oil?

crude oil does not produce greenhouse gases when burned

crude oil can be easily transported through pipes

crude oil does not produce air pollution when burned

#41. Is this statement true or false? As potential difference increases, the current across a component increases?

False

True

#42. Calculate the distance travelled by the runner in the velocity/time graph.

The area under the graph = distance travelled

Split the graph into triangles and rectangles and calculate the areas. Then add together the areas.

Area of a rectangle = Length x Height

Area of a triangle = 1/2 x Length x Height

90m 120m 180m = 390m

NOTE: the graph starts at one second and not 0. Don’t be fooled, look at the axes carefully before attempting a question.

#43. Fill in the gap. In a parallel circuit, the current …… at a junction.

Doubles

Splits

#44. True or False – Scalar quantities only have magnitude?

False

True

#45. Which of the following is the equation for change in gravitational potential energy?

GPE = mass x gravitational field strength x change in velocity

GPE = mass x gravitational field strength x change in vertical height

GPE = mass x kinetic energy x change in vertical height

#46. Iron is a magnetic material – true or false?

true

false

#47. True or False – Vector quantities only have magnitude?

True

False

#48. Which of the following can affect braking distances? ? 5

Select all that apply:

Drugs/alcohol

State of the road surface

Speed of the vehicle

Distractions

Mass of the vehicle

State of the brakes

Weather conditions

#49. Calculate the momentum of a vehicle with a mass of 1500kg and a velocity of 35m/s. Add the units “kg m/s” after your answer ? momentum equation is available in the description below the quiz

#50. What is the acceleration of an object that has an initial velocity of 10m/s and a final velocity of 50m/s. The object took 15s to accelerate to the final velocity.

3 m/s²

2.8 m/s²

2.6 m/s²

5 m/s²

Use the following equation:

a = (v − u)

t

#51. Which is the correct definition for non-renewable energy resources?

they are infinite

they are replaced and are inexhaustible

they are not replaced and are exhaustible

#52. How is gravitational potential energy stored?

Stored as movement

Stored as the potential to fall and become kinetic energy

Stored in gravitational bonds between particles

Stored as increased mass

#53. What is displacement?

how far from the equilibrium point the wave has oscillated

the maximum displacement of a wave

the number of waves passing a point each second

the distance of one entire oscillation

the time taken for a full oscillation

#54. What is the function of a fuse?

provides a constant resistance

makes or breaks a circuit

measures current

safety component which can break a faulty circuit

provides variable resistance

releases light

allows current to only flow one way

two or more cells in a circuit

gives power to a circuit

measures potential difference

#55. A wire carrying a current experiences a force near a magnetic field. The size of the force is dependant on which three quantities?

Select all that apply:

The magnetic field strength

The length of the wire

The age of the magnetic field

The size of the current

The shape of the magnetic field

#56. Find the volume of a silver block that has a mass of 159g and a density of 10.49 g/cm³. Give your answer in cm³ and to 1 decimal place.

#57. Which of the following is an advantage of non-renewable energy sources?

They have low energy density

They are Intermittent

They have high energy density

#58. A bar magnet is a permanent magnet – what does that mean?

it is a magnet most of the time

it is always magnetic

it is a very strong magnet

it is only temporarily magnetic

#59. If a car experiences a resultant force in the forwards direction, what will happen to the motion of the car?

It will move backwards at constant speed

It will accelerate forwards

It will decelerate forwards

#60. Steel is a magnetic material – true or false?

true

false

#61. Which of these is an example of transverse waves?

sound waves

vibrations in a guitar string

seismic P waves

ultrasound waves

#62. What is an alpha particle?

two neutrons without any protons

two protons and two neutrons but no electrons

high frequency electromagnetic radiation

an electron

#63. What is this component?

#64. Cobalt is a magnetic material – true or false?

true

false

#65. Is this a parallel or series circuit?

Parallel

Series

#66. Magnets can attract magnetic materials – true or false?

false

true

#67. What are positrons?

an electron

high frequency electromagnetic radiation

an antimatter particle equivalent to an electron

two protons and two neutrons but no electrons

#68. What is induced magnetism?

where two bar magnets are placed on top of each other and they rotate due to the magnetic field

when water comes close to a magnet it begins to heat up slowly due to the magnetic field

temporary magnetic properties which are passed on to magnetic materials in the presence of magnetic fields

#69. What is Newton’s Third Law of Motion?

F = MA

every action has an equal and opposite reaction

objects in motion stay in motion and objects at rest stay at rest

#70. The diagram shows a solenoid. Why is the magnetic field stronger along the centre of the coil than on the outside? ? Select two answers

Select all that apply:

The fields on the inside are stronger due to the nanoelectric effects of electromagnetic induction

The fields add together in the centre and become nearly uniform and strong

The fields of the outside are weaker due to the greater potential difference at the centre of the wires in the coil

The fields cancel out to give a weaker field on the outside

#71. What is the source of energy for the sun?

nuclear fission

nuclear fusion

hydrocarbons

#72. Calculate the change in height of the tennis ball in the following scenario. A ball weighs 0.15kg – the change in GPE is 100 J – the gravitational field strength is 10N/kg. Answer to 1dp and include units. ? If you do not know the GPE equation, it is listed below the quiz

#73. For circular motion to take place there must be a resultant force that acts towards the centre of the circle. What is the name of this force?

Centripital Force

Centrifugal Force

Coriolis Force

#74. Which process transfers heat through vibrations between particles?

Conduction

Radiation

Induction

Convection

#75. Fill in the blank: A current flowing through a wire causes a ………. field.

#76. When two magnets are placed alongside each other – what is the best way to describe the shape of the magnetic field they produce?

erratic

2-dimentional

uniform

#77. How is renewable energy usage changing as a percentage of total energy production worldwide?

rising

staying the same

falling

#78. The force on a conductor carrying current at right angles to a magnetic field is expressed by which of the following equations?

F = magnetic flux density x resistance x current

F = magnetic flux density / current x length

F = magnetic flux density x current x length

#79. What is an electrical fault?

When an appliance breaks down and need to be repaired

When a fuse has reached its expiry and needs to be replaced

When the live wire touches a metal part (casing) of an appliance or plug

#80. When moving from air to glass, what will happen to a wave’s speed?

It will stay the same

It will slow down

It will speed up

#81. What is the function of a switch?

two or more cells in a circuit

releases light

provides variable resistance

safety components which can break a faulty circuit

gives power to a circuit

makes or breaks a circuit

allows current to only flow one way

measures current

provides a constant resistance

measures potential difference

#82. Complete the sentence: Newton’s Second Law defines inertial mass. Inertial mass is a measure of how difficult it is to change the …….. of an object.

Magnitude

Displacement

Velocity

#83. What is current measured in?

Volts

Amperes or Amps

Coulombs

Ohms

#84. Calculate the acceleration of an object which has the following characteristics. Use the following equation v² − u² = 2 a x. Final velocity = 50m/s, Initial velocity 0m/s, Distance travelled = 350m

1250 m/s²

2.65 m/s²

25 m/s²

3.57 m/s²

Rearrange the equation to the following and then substitute in the correct values:

a = v² – u²

2 x

Where:

a = acceleration

v² = final velocity squared

u² = initial velocity squared

x = distance

#85. When a substance changes from a solid to a liquid, what happens to the mass?

The mass decreases

The mass increases

The mass stays the same

Stays the same because there has been no change in the number of particles. We say that the mass has been conserved.

#86. Wave speed is linked to wave frequency and wavelength by which equation?

v = f x a x λ

v = f / λ

v = f x λ

#87. Which of the following is a disadvantage of fossil fuels?

they are cheap

they produce air pollution

they are simple technologies

#88. An object with a mass of 5kg is raised to 100m above the ground and has 500 J of gravitational potential energy. What will happen to the gravitational potential energy if the mass was increased to 16.3kg? Calculate the change in GPE where the gravitational field strength is 1 N/kg. Include units. ? If you do not know the GPE equation, it is listed below the quiz

#89. Does the total amount of current change from the positive to the negative terminal?

No

Yes

Yes, but only if there is more than 1 component in the circuit

Because current is conserved.

#90. Vectors have which of the following quantities?

Magnitude and direction

direction only

Magnitude only

#91. What is a battery?

provides a constant resistance

makes or breaks a circuit

two or more cells in a circuit

#92. Is natural gas a fossil fuel?

partially

yes

no

#93. Is speed a vector or a scalar?

scalar

vector

#94. Using the equation ρ = m/V, calculate the density of a gold bar that has a mass of 25kg and a volume of 0.0013m³. Answer to 1 decimal place and give your answer in kg/m³. ? The units for density are kg/m³, do not include them in your answer

#95. Using the kinetic energy equation – calculate the kinetic energy of a car with a mass of 1200kg travelling at 10 m/s. Include units. ? If you do not remember the kinetic energy equation it is listed below the quiz.

GCSE OCR Combined Science B Papers 3 and 7

Good Luck!

Results

#1. Why is the total energy transferred to a kettle’s heating element, more than the total energy of the boiled water inside the kettle?

#2. Complete the sentence: Reaction time is the time between a ……. being detected and a ……..

#3. How is fossil fuel usage changing as a percentage of total energy production worldwide?

#4. What is this component?

#5. Is coal renewable?

#6. Calculate the acceleration of the object in the graph between 5 and 6 seconds.

#7. True or false – electromagnetic waves can travel through a vacuum?

#8. What do we call energy that is stored inside atoms?

#9. What is the equation relating wave speed (v) distance (x) and time (t)?

#10. What is happening to the speed of the object in the graph between 0 and 8 seconds?

#11. What is acceleration?

#12. What is the purpose of the earth wire in a plug?

#13. What is this component?

#14. True or false – microwave radiation at certain frequencies could cause the internal heating of cells in our bodies?

#15. Acceleration is an increase in the rate of what?

#16. Which is the correct definition for renewable energy resources?

#17. Is velocity a vector or a scalar?

#18. Which greek letter represents density?

#19. What is amplitude?

#20. How can we upgrade our windows to reduce heat loss?

#21. Which theory do we use to describe states of matter?

#22. What is this Sankey Diagram showing?

#23. What do we call energy that is stored in chemicals?

#24. What is the purpose of fuses and circuit breakers?

#25. In transverse waves are the vibrations parallel or at right angles to the direction of wave travel?

#26. What is the function of a variable resistor?

#27. Which form of radiation is least ionising?

#28. Magnets have north and south poles – if two south poles are put close together what will happen?

#29. If a car is moving but the forces are balanced – what will happen to the speed of the car?

#30. Calculate the force when an object changes its momentum by 2550 kg m/s in 5 seconds. Include the units for force in your answer.

#31. What is the longest wavelength of electromagnetic radiation

#32. Conventional current goes from:

#33. Which of the following is the correct equation for momentum?

#34. Is geothermal renewable?

#35. Is oil a fossil fuel?

#36. Which of the following can be used to measure reaction times?

#37. Which device can you use to find the direction of a magnetic field?

#38. Why is it dangerous to connect a live and earth wire?

#39. What wavelength of the electromagnetic spectrum does a radiator glow at?

#40. Which of the following is an advantage of crude oil?

#41. Is this statement true or false? As potential difference increases, the current across a component increases?

#42. Calculate the distance travelled by the runner in the velocity/time graph.

#43. Fill in the gap. In a parallel circuit, the current …… at a junction.

#44. True or False – Scalar quantities only have magnitude?

#45. Which of the following is the equation for change in gravitational potential energy?

#46. Iron is a magnetic material – true or false?

#47. True or False – Vector quantities only have magnitude?

#48. Which of the following can affect braking distances? ? 5

#49. Calculate the momentum of a vehicle with a mass of 1500kg and a velocity of 35m/s. Add the units “kg m/s” after your answer ? momentum equation is available in the description below the quiz

#50. What is the acceleration of an object that has an initial velocity of 10m/s and a final velocity of 50m/s. The object took 15s to accelerate to the final velocity.

#51. Which is the correct definition for non-renewable energy resources?

#52. How is gravitational potential energy stored?

#53. What is displacement?

#54. What is the function of a fuse?

#55. A wire carrying a current experiences a force near a magnetic field. The size of the force is dependant on which three quantities?

#56. Find the volume of a silver block that has a mass of 159g and a density of 10.49 g/cm³. Give your answer in cm³ and to 1 decimal place.

#57. Which of the following is an advantage of non-renewable energy sources?

#58. A bar magnet is a permanent magnet – what does that mean?

#59. If a car experiences a resultant force in the forwards direction, what will happen to the motion of the car?

#60. Steel is a magnetic material – true or false?

#61. Which of these is an example of transverse waves?

#62. What is an alpha particle?

#63. What is this component?

#64. Cobalt is a magnetic material – true or false?

#65. Is this a parallel or series circuit?

#66. Magnets can attract magnetic materials – true or false?

#67. What are positrons?

#68. What is induced magnetism?

#69. What is Newton’s Third Law of Motion?

#70. The diagram shows a solenoid. Why is the magnetic field stronger along the centre of the coil than on the outside? ? Select two answers

#71. What is the source of energy for the sun?

#72. Calculate the change in height of the tennis ball in the following scenario. A ball weighs 0.15kg – the change in GPE is 100 J – the gravitational field strength is 10N/kg. Answer to 1dp and include units. ? If you do not know the GPE equation, it is listed below the quiz

#73. For circular motion to take place there must be a resultant force that acts towards the centre of the circle. What is the name of this force?

#74. Which process transfers heat through vibrations between particles?

#75. Fill in the blank: A current flowing through a wire causes a ………. field.

#76. When two magnets are placed alongside each other – what is the best way to describe the shape of the magnetic field they produce?

#77. How is renewable energy usage changing as a percentage of total energy production worldwide?