OCR Gateway GCSE Physics

Topic Questions

GCSEPhysicsOCR GatewayTopic Questions8. Global Challenges8.3 Earth & Space

8.3 Earth & Space

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11 mark

The table contains statements about red-shift and galaxies.

Which row in the table is correct?

  Statement 1 Statement 2
A All galaxies move apart at the same speed. They show both red-shift and blue-shift.
B Distant galaxies show more red-shift. The distant galaxies are moving apart faster than nearby ones.
C Distant galaxies show more red-shift. The distant galaxies are moving apart slower than nearby ones.
D There are no galaxies that show blue-shift. All galaxies are moving away from each other.

 

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21 mark

All bodies emit electromagnetic radiation.

Body R is at a higher temperature than body S.

Which statement is correct?

  • R emits radiation with a mean higher frequency.

  • R emits radiation with a mean longer wavelength.

  • S emits radiation with a higher intensity.

  • S emits radiation with a mean shorter wavelength.

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11 mark

Which statement about geostationary satellites is correct?

  • They appear to be in a fixed position relative to a point on the Earth.

  • They are in a polar orbit.

  • They are positioned 400 km above the Earth’s surface.

  • They take 2 hours to orbit the Earth.

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21 mark

Higher Only

 

The average temperature on the Earth has increased over the last century.

Which statement explains why?

  • Radiation absorbed by the Earth has decreased.

  • Radiation absorbed is less than radiation emitted.

  • Radiation absorbed is greater than radiation emitted.

  • Radiation emitted by the Earth has increased.

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31 mark

Which statement about a star that explodes into a supernova is correct?

  • The star has more mass than the sun.

  • The star is older than the sun.

  • The star will become a white dwarf.

  • The star’s core expands.

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41 mark

Higher Only

 

A planet moves in a circular orbit around its star.

Which statement is correct?

  • The planet travels at changing speed and changing velocity.

  • The planet travels at changing speed but constant velocity.

  • The planet travels at constant speed and velocity.

  • The planet travels at constant speed but changing velocity.

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51 mark

An artificial satellite is kept in its low polar orbit by a gravity force from a planet.

The satellite is moved to a higher orbit above the planet.

Which statement is correct about the satellite in this higher orbit?

  • The force of gravity is greater and its speed decreases.

  • The force of gravity is greater and its speed increases.

  • The force of gravity is less and its speed decreases.

  • The force of gravity is less and its speed increases.

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61 mark

Higher Only

 

Planet Ocra is in a circular orbit around a star.

q11-paper4-june2098-ocr-gcse-physics

Which statement is correct?

  • The acceleration of Ocra is zero.

  • The speed of Ocra is changing.

  • The velocity of Ocra is changing.

  • The velocity of Ocra is zero.

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71 mark

Higher Only

 

An artificial satellite orbits the Earth in a circular path.

The satellite is moved further away from Earth to another orbit.

Which row in the table is correct?

  Force of gravity Speed in orbit Time period
A decreases decreases decreases
B decreases decreases increases
C decreases increases increases
D increases increases increases

 

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81 mark

Which statement is correct about geostationary satellites?

  • They are above the equator and they orbit the Earth in about 90 minutes at a high orbit.

  • They are above the equator and they orbit the Earth in 24 hours at a high orbit.

  • They are above the equator and they orbit the Earth in 24 hours at a low orbit.

  • They are above the poles and they orbit the Earth in 24 hours at a low orbit.

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91 mark

How was the Sun formed?

  • From dust and gas pulled together by gravity leading to a fission reaction.

  • From dust and gas pulled together by gravity leading to a fusion reaction.

  • From dust and gas pushed together by gravity leading to a fission reaction.

  • From dust and gas pushed together by gravity leading to a fusion reaction.

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101 mark

The Sun was formed from a cloud of dust and gas.

Which force brought together the particles of the cloud?

  • Electrostatic

  • Frictional

  • Gravitational

  • Magnetic

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111 mark

Which statement is evidence for an expanding universe?

  • Light from galaxies is red shifted.

  • Nuclear fusion occurs in stars.

  • Many stars have orbiting planets.

  • Stars were formed from dust and gas.

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121 mark

Which row A, B, C or D, describes what has happened to light that has undergone red shift?

  Wavelength Frequency
A Decreases Decreases
B Decreases Increases
C Increases Decreases
D Increases Increases

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