Astronomy Revision

The Big Bang is:

• was a big explosion

• the beginning of the universe where it started expanding from a single point

• when the universe was created and started exploding from that point onwards

• the beginning of the universe and when the dinosaurs died

Which of the following is evidence for the Big Bang? (There is multiple answers to this question)

• The universe is changing and expanding as shown by red-shift.

• Creation of the elements into larger elements

• The universe is changing and expanding which is shown by blue-shift.

• Background microwave radiation

• The explosion that occurred created all the elements

Who was the person that discovered that the universe is expanding and that further galaxies are moving away at a faster rate?

• Isaac Newton

• Edwin Hubble

• Gregor Mendel

• Charles Darwin

When an object is moving towards an observer it has a ___________ frequency.

If you are travelling out in space at the same rate as a moving star, would you see:

• Blue

• Red

• No colour

Which are the following are true about the Doppler Effect? (There is multiple answers to this question)

• The Doppler Effect can be demonstrated with the change in pitch or colour of light depending on the movement of an object.

• An object travelling towards an observer on the street would emit a high frequency wave which would give a low pitch sound

• The Doppler Effect is the apparent change in the frequency of a wave caused by relative motion between the source of the wave and the observer

• Can be shown with light by purple and red shift

• An object moving towards us from space would show a blue-shift in the spectrum and emit blue light.

Why does our Sun have a lowest apparent magnitude?

• It is the brightest star in the universe

• It is the closest star to us and therefore appears the brightest to us

• The amount of gas produced allows it to shine the brightest

• It's the furthest away from us

Which galaxy is moving at a faster away from us?

• Galaxy A

• Galaxy B

A light year is a measure of

• distance

• time

• space

• height

The measure of brightness of a star is called: (There is multiple answers to this question)

• H-R diagram

• Apparent brightness

• Absolute brightness

• Spectral lines