Test #2 Review

How long ago did the Big Bang occur?

• 13.8 billion years ago

• 4.6 billion years ago

• 13.8 million years ago

• 10 years ago

RED shift of light means the star is moving

• toward Earth

• away from Earth

• not moving

BLUE shift of light means the star is moving

• toward Earth

• away from Earth

• not moving

RED shift is proof that the universe is

• expanding (getting bigger)

• contracting (getting smaller)

Which provides proof that the universe is expanding?

• Red shift of light from distant stars

• Blue shift of light from distant starts

Which of the following is proof for the Big Bang Theory?

• similar composition of Earth and the Moon

• stars appear to move in the night time sky

• cosmic background radiation

• Ms. Phelan's dog chasing his tail

Cosmic Background Radiation is...

• the remaining energy from the big bang.

• incredibly hot.

• visible to the human eye.

• only located in certain places in the universe.

This diagram shows the ___ system, first thought by Copernicus & supported by Kepler & Galileo.

• Heliocentric
• Ptolemaic
• Geocentric
• Polycentric

Because the earth revolves around the sun on a tilted axis...

• we have seasons
• we see different constellations in the sky different times of year
• the vertical ray of the sun travels from 23.5N to 23.5S
• All of the above

What takes a year?

• rotation
• revolution