Astrophysics Revision Recall Quiz 2

What unit is orbital speed measured in?

• m/s

• m/s²

• ms

• km/hr²

Which of the following objects has the longest orbital time period?

• Earth

• The Moon

• A comet

• Mars

Which of the following will eventually become a supernova?

• Stars with a similar mass to the Sun.

• Stars with a larger mass than the Sun.

• Stars with a smaller mass than the Sun.

• Black holes.

The gravitational field strength on the surface of the planet Mercury is smaller than the gravitational field strength on the Earth's surface.

This is because Mercury has a ...

• larger mass than Earth.

• smaller mass than Earth.

• higher surface temperature than Earth.

• Lower rotational speed than Earth.

True or False?

"The colour of a star is related to the star's surface temperature."

• True

• False

Which of the following does not orbit a planet?

• A moon

• A comet

• An artificial satellite

Which of these statements is incorrect?

• The universe contains billions of galaxies.

• The universe contains billions of stars.

• The universe is known as the Milky Way.

On a Hertzsprung-Russell diagram, white dwarfs group together because they have ...

• negative absolute magnitudes and

  high temperatures.

• negative absolute magnitudes and low temperatures.

• positive absolute magnitudes and high temperatures.

• positive absolute magnitudes and low temperatures.