The expansion of Universe

Which element are the most commonly found in the Sun?

• Hydrogen and oxygen

• Helium and carbon

• Hydrogen and helium

• Nitrogen and oxygen

Light from distant galaxies is redshifted when measured on Earth. Which of the following ideas does this provide evidence for?

1. The Bing Bang Theory

2. 2. The Universe is expanding

3. 3. Distant Galaxies are moving both towards us and away from us

• 1 only

• 1 and 2

• 2 only

• 1, 2 and 3

What does the constant 2.2 × 10^-18 per second represent?

• 1 light year

• Red-shift

• The CMBR

• The Hubble constant

Which part of the electromagnetic spectrum does the Sun radiate most of its energy in?

• radio, visible and gamma

• infrared, visible and ultraviolet

• infrared, X-rays and gamma

• infrared, visible and gamma

What is the correct description of the Milky Way?

• Universe

• Star

• Galaxy

• Nebula

Which is the best description of redshift?

• Distant galaxies only emit light from the red end of the spectrum.

• Only red light can reach Erath from very distant stars.

• Stars in the Milky Way mostly emit light at the red end of the spectrum.

• The light received from distant galaxies is moved towards the red end of the spectrum

What is the process which makes stable stars such as the Sun shine, and which element produced in the reaction?

• A

• B

• C

• D

Which of the following equations correctly represents the age of the Universe?

• 
• 
• 
• 

Which is the correct value of one light year?

• 9.5 ×10¹⁵ km

• 9.5 × 10¹⁵ m

• 9.5 × 10¹⁵ s

• 9.5 × 10¹⁵ days

The planet Uranus has an average orbital radius of 4500 million km. How long does it take light from the Sun to travel to Uranus?

• 4 minutes

• 1 hour

• 4 days

• 4 hours