Astrophysics Revision Recall Quiz 1

The Milky Way is ...

• the name of our Solar System.

• the name of the galaxy our Solar

  System is in.

• a collection of billions of galaxies.

The Sun is a yellow star.

Which of the following stars will have a lower surface temperature than the Sun?

• A blue star

• A white star

• A yellow-white star

• A red star

True or False?

"The life cycle of a star depends on its mass."

• True

• False

True or False?

"The gravitational field strength on the Moon's surface is the same as the gravitational field strength on the Earth's surface."

• True

• False

What force allows planets and satellites to maintain their orbits?

• Magnetic

• Electrostatic

• Gravitational

Which of the following statements about a comet's orbit is true?

• he speed of the comet changes during its orbit.

• The orbit is slightly elliptical.

• The Sun is at the centre of the orbit.

• The orbit is circular.

Which of the following units is gravitational field strength measured in?

• N/m²

• N/kg

• m/s

The absolute magnitude of a star is ...

• how bright the star would appear if it was at a standard distance from Earth.

• the brightest the star could appear to an observer.

• how bright the star appears from Earth.