OCR Combined Science B Papers 3 and 7 Automock

#1. How can electrons change orbits?

by absorbing electromagnetic radiation

being struck by a proton

randomly changing orbits

#2. What is current measured in?

Volts

Amperes or Amps

Coulombs

Ohms

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

Doubles

Splits

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

velocity

gravitational potential energy

magnitude

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

false

true

#6. Which of the following equations correctly describes the relationship between force and change in momentum (Newton’s Second Law)

Force (N) = change in momentum (kg m/s) / time (s) x velocity (m/s) [F = (mv − mu) / t x v]

Force (N) = change in momentum (kg m/s) / time (s) [F = (mv − mu) / t]

Force (N) = time (s) / change in momentum (kg m/s) [F = t / (mv − mu)]

Force (N) = change in momentum (kg m/s) x time (s) [F = (mv − mu) x t]

#7. 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

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

parallel

right angles

#9. Is solar power renewable?

no

partially

yes

#10. Is mass a vector or a scalar?

scalar

vector

#11. If a current travelling along a wire changes direction, does the magnetic field also change direction?

No

Occasionally

Yes

#12. Which component is described: A glass tube with a thin wire inside that melts if too much current passes through it, breaking the circuit.

An earth wire

A circuit breaker

A fuse

#13. Is coal a fossil fuel?

partially

yes

no

#14. What wavelength of the electromagnetic spectrum is useful for security marking?

visible light

x-rays

microwaves

gamma rays

infrared

ultraviolet light

radiowaves

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

true

false

#16. What is potential difference measured in?

Coulombs

Volts

Amperes or Amps

Ohms

#17. This image shows Flemming’s Left Hand Rule. Which of the following answers are the correct interpretations of the rule? ? Select three answers, one for each finger

The middle finger shows the direction of the force

The index finger shows the direction of the magnetic field

The thumb shows the direction of the magnetic field

The thumb shows the direction of the force

The index finger shows the direction of the current

The middle finger shows the direction of the current

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

false

true

#19. What is this component?

#20. An electric motor does 70,000 J of work in 200 s. Calculate the Power of this action. Include the units and answer to 1d.p ? Do not include your workings in your answer

#21. Is speed a vector or a scalar?

scalar

vector

#22. Kate and Emma both walk up 10 stairs, moving 4.5m higher than before. Emma does this in 2.7 seconds, Kate does this in 3.2 seconds. Which girl has exerted the most power?

Kate

Emma

#23. True or false – x-rays have longer wavelengths than visible light?

true

false

#24. Calculate the total momentum after two objects collide. Object A has a momentum of 20 kg m/s and Object B has a momentum of -15 kg m/s. Include the units “kg m/s” in your answer.

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

10 m/s²

20 m/s²

2 m/s²

1 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

#26. Calculate the forces involved in an accident where a 1650 kg car travelling at 20 m/s hits a wall and the car comes to a stop in 0.05 seconds. Use the following equation: Force = mass x final velocity – mass x initial velocity / t (include units in your answer)

#27. If an object is moving in a circular path – what is happening to its velocity?

increasing over time

constantly changing

declining over time

constant

#28. What is the function of a fuse?

makes or breaks a circuit

two or more cells in a circuit

provides a constant resistance

measures potential difference

measures current

safety component which can break a faulty circuit

releases light

gives power to a circuit

allows current to only flow one way

provides variable resistance

#29. Copper is a magnetic material – true or false?

false

true

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

Stimulus, response

Response, stimulus

Interaction, action

Reaction, stimulus

#31. When a light wave enters glass or water from the air, does it refract towards or away from the normal line?

Away from the normal

Towards the normal

#32. Which process transfers heat using electromagnetic waves?

Conduction

Convection

Radiation

Induction

#33. What is Newton’s First Law of Motion?

F = MA

objects in motion stay in motion and objects at rest stay at rest (unless acted upon by a resultant force)

every action has an equal and opposite reaction

#34. What is wavelength?

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 time taken for a full oscillation

the distance of one entire oscillation

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

It will accelerate forwards

It will decelerate forwards

It will move backwards at constant speed

#36. Is displacement a vector or a scalar?

vector

scalar

#37. What does E represent in the equation for work done?

Power

Elasticity

Distance moved

Work done

#38. No refraction takes place if a wave is travelling along which line?

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

provides a constant resistance

gives power to a circuit

safety component which can break a faulty circuit

allows current to only flow one way

releases light

measures potential difference

makes or breaks a circuit

measures current

two or more cells in a circuit

provides variable resistance

#40. What are the units we use for measuring energy?

#41. What does F represent in the equation for work done?

Power

Force

Energy

Distance

#42. Is velocity a vector or a scalar?

vector

scalar

#43. Conventional current goes from:

Negative terminal to positive terminal

Positive terminal to negative terminal

#44. Renewable energy resources mostly get their energy from the same source what is this source?

gravity

the sun

the stars

antimatter

1

#45. 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

#46. Electrons are negatively charged, so they move to which terminal of a battery or cell?

Negative

Positive

#47. Is coal renewable?

yes

no

partially

#48. True or false – x-rays and gamma rays can cause DNA mutations or damage to cells in the body?

true

false

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

#50. What wavelength of the electromagnetic spectrum is useful for sterilising food and medical equipment?

visible light

ultraviolet light

radiowaves

microwaves

x-rays

infrared

gamma rays

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

falling

staying the same

rising

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

erratic

uniform

2-dimentional

#53. The needles of plotting compasses are tiny magnets – they always point near the Earth’s North Pole – why is this?

magnets always point upwards

the Earth has a magnetic core

the Earth is round

#54. Is wind power renewable?

partially

no

yes

#55. What is this component?

#56. Determine the speed of the object between 1 and 3 seconds. ? answer to 2 decimal places

#57. How do crumple zones and airbags in cars protect people inside the car in a crash?

Making the crash louder, attracting attention so emergency services arrive sooner

Reducing the size of the deceleration and the forces experienced by the body

Pushing the driver into the seat so they are safe from flying glass

#58. 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) × time (s) [p=m×t]

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

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

#59. Do ultraviolet rays have longer wavelengths than infrared waves?

No

Yes

#60. Are electromagnetic waves transverse or longitudinal?

longitudinal

transverse

#61. What is this component?

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

Replace with electrostatically repulsive glass

Upgrade to double or triple glazing

#63. Why is geothermal energy not used more often around the world?

the technology is extremely complex and therefore too expensive for most countries

the amount of energy that is received is too low to make it economically viable

very hot rocks and soil are needed to heat water - occurs only in areas of volcanism

#64. What is this component?

#65. A current carrying conductor placed near a magnet experiences a force. The magnet also experiences a force, which is the best description of this force?

Unequal and parallel

Unequal and opposite

Equal and opposite

Equal and perpendicular

#66. Which of the following is a disadvantage of tidal energy generation?

there is not enough energy in the tides to produce electricity

salt-water is corrosive

the tides are predictable

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

Geometric Theory

Particulatory Coherence Theory

Particle/Kinetic Theory

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

nothing will happen

they will attract

they will repel

#69. 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

Coriolis Force

Centrifugal Force

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

false

true

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

every action has an equal and opposite reaction

F = MA

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

#72. Waves that pass a boundary between two materials change speed and also change direction. What is this change of direction called?

Refraction

Compression

Rarefaction

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

they are simple technologies

they produce air pollution

they are cheap

#74. Is nuclear fission a fossil fuel?

yes

no

partially

#75. Cavity walls are often used to reduce heat loss through walls – why is this effective?

The gap between the two layers prevents conduction

The gap between the two walls creates a barrier to stop radiation

#76. Do light waves speed up or slow down then they go from air into water?

Slow down

Speed up

#77. What is the longest wavelength of visible light

orange

violet

blue

indigo

yellow

red

green

#78. A student sets up a series circuit that has two filament lamps, a power source and a switch after the first lamp. Can the first lamp be turned off whilst keeping the second lamp on?

Yes

No

#79. Calculate the change in momentum of an object that experiences a force of 350 N over 15 s. Include the units “kg m/s” in your answer

#80. Which of the following are ways that a magnetic field of an electromagnet can be made stronger?

Select all that apply:

Reversing the direction of the current

Placing an iron core inside the coil of wires

Increasing the current flowing through the electromagnet

#81. What is amplitude?

how far from the equilibrium point the wave has oscillated

the time taken for a full oscillation

the number of waves passing a point each second

the maximum displacement of a wave

the distance of one entire oscillation

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

it is always magnetic

it is only temporarily magnetic

it is a very strong magnet

it is a magnet most of the time

#83. True or False – Magnetic field lines are used to show how a single north pole would move from north to south?

true

false

#84. What is frequency?

the number of waves passing a point each second

the distance of one entire oscillation

the maximum displacement of a wave

how far from the equilibrium point the wave has oscillated

the time taken for a full oscillation

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

GPE = mass x kinetic energy x change in vertical height

GPE = mass x gravitational field strength x change in velocity

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

#86. Does a current flow if there is no source of potential difference?

Yes

No

#87. What wavelength of the electromagnetic spectrum is useful for thermal imaging?

visible light

x-rays

gamma rays

ultraviolet light

infrared

#88. What is the function of a voltmeter?

gives power to a circuit

measures current

measures potential difference

#89. What is the rate of acceleration in freefall?

#90. Is natural gas a fossil fuel?

yes

partially

no

#91. What is an ion?

two neutrons without any protons

an atom that has gained or lost electrons

an atom which has a different number of neutrons

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

nuclear fission

hydrocarbons

nuclear fusion

#93. Which of the following devices do we use to measure weight? ? 2 answers

Select all that apply:

A potometer

A balance

A newton-meter (force meter)

A hydrometer

#94. In a parallel circuit, is the potential difference across each branch –

Different

Equal

#95. What wavelength of the electromagnetic spectrum is useful for cooking?

gamma rays

x-rays

infrared

visible light

ultraviolet light

GCSE OCR Combined Science B Papers 3 and 7

Good Luck!

Results

#1. How can electrons change orbits?

#2. What is current measured in?

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

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

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

#6. Which of the following equations correctly describes the relationship between force and change in momentum (Newton’s Second Law)

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

#9. Is solar power renewable?

#10. Is mass a vector or a scalar?

#11. If a current travelling along a wire changes direction, does the magnetic field also change direction?

#12. Which component is described: A glass tube with a thin wire inside that melts if too much current passes through it, breaking the circuit.

#13. Is coal a fossil fuel?

#14. What wavelength of the electromagnetic spectrum is useful for security marking?

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

#16. What is potential difference measured in?

#17. This image shows Flemming’s Left Hand Rule. Which of the following answers are the correct interpretations of the rule? ? Select three answers, one for each finger

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

#19. What is this component?

#20. An electric motor does 70,000 J of work in 200 s. Calculate the Power of this action. Include the units and answer to 1d.p ? Do not include your workings in your answer

#21. Is speed a vector or a scalar?

#22. Kate and Emma both walk up 10 stairs, moving 4.5m higher than before. Emma does this in 2.7 seconds, Kate does this in 3.2 seconds. Which girl has exerted the most power?

#23. True or false – x-rays have longer wavelengths than visible light?

#24. Calculate the total momentum after two objects collide. Object A has a momentum of 20 kg m/s and Object B has a momentum of -15 kg m/s. Include the units “kg m/s” in your answer.

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

#26. Calculate the forces involved in an accident where a 1650 kg car travelling at 20 m/s hits a wall and the car comes to a stop in 0.05 seconds. Use the following equation: Force = mass x final velocity – mass x initial velocity / t (include units in your answer)

#27. If an object is moving in a circular path – what is happening to its velocity?

#28. What is the function of a fuse?

#29. Copper is a magnetic material – true or false?

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

#31. When a light wave enters glass or water from the air, does it refract towards or away from the normal line?

#32. Which process transfers heat using electromagnetic waves?

#33. What is Newton’s First Law of Motion?

#34. What is wavelength?

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

#36. Is displacement a vector or a scalar?

#37. What does E represent in the equation for work done?

#38. No refraction takes place if a wave is travelling along which line?

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

#40. What are the units we use for measuring energy?

#41. What does F represent in the equation for work done?

#42. Is velocity a vector or a scalar?

#43. Conventional current goes from:

#44. Renewable energy resources mostly get their energy from the same source what is this source?

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

#46. Electrons are negatively charged, so they move to which terminal of a battery or cell?

#47. Is coal renewable?

#48. True or false – x-rays and gamma rays can cause DNA mutations or damage to cells in the body?

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

#50. What wavelength of the electromagnetic spectrum is useful for sterilising food and medical equipment?

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

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

#53. The needles of plotting compasses are tiny magnets – they always point near the Earth’s North Pole – why is this?

#54. Is wind power renewable?

#55. What is this component?

#56. Determine the speed of the object between 1 and 3 seconds. ? answer to 2 decimal places

#57. How do crumple zones and airbags in cars protect people inside the car in a crash?

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

#59. Do ultraviolet rays have longer wavelengths than infrared waves?

#60. Are electromagnetic waves transverse or longitudinal?

#61. What is this component?

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

#63. Why is geothermal energy not used more often around the world?

#64. What is this component?

#65. A current carrying conductor placed near a magnet experiences a force. The magnet also experiences a force, which is the best description of this force?

#66. Which of the following is a disadvantage of tidal energy generation?

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

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

#69. 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?

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

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

#72. Waves that pass a boundary between two materials change speed and also change direction. What is this change of direction called?

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

#74. Is nuclear fission a fossil fuel?

#75. Cavity walls are often used to reduce heat loss through walls – why is this effective?

#76. Do light waves speed up or slow down then they go from air into water?

#77. What is the longest wavelength of visible light

#78. A student sets up a series circuit that has two filament lamps, a power source and a switch after the first lamp. Can the first lamp be turned off whilst keeping the second lamp on?