REVIEW CHAPTER 1

Astronomers have observed that absorption bands in the spectra of distant stars are shifted towards the red end of the light spectrum. This observation provides evidence that:

• those stars are moving away from earth

• the universe is becoming warmer

• the universe is contracting

• the elemental composition of those stars is changing

If a star is being observed from Earth and its light has shifted towards the blue side of the electromagnetic spectrum, what could be concluded?

• It is moving towards Earth.

• those stars are moving away from earth 

• the universe is steady

• the elemental composition of those stars is changing

The perception of the universe has changed over time. As new technology like telescopes became available, the ideas of the universe changed. When did the geocentric view of the universe progress to the heliocentric view of the universe?

• Between the time of Aristotle and Ptolemy

• Between the time of Copernicus and Galileo

• From the time before and leading up to Aristotle

• Between the time of Ptolemy and Copernicus

 

Select the statement that provides evidence of the Big Bang Theory.

• Presence of light elements like hydrogen and helium in abundance

• Discovery of meteorites

• Discovery of millions of galaxies by Hubble Telescope

• Acceptance of idea that the Sun is the center of the solar system

 

Galaxies appear to be —

• moving away from other galaxies

• remaining stationary

• converging

• imploding on themselves

What is most likely to be found in a nebula?

• Gas clouds

• Asteroids

• Planets

• Salt crystals

7. Which scientist had the correct theory about how the solar system is arranged?

• Kepler

• Ptolemy

• Copernicus

• Aristotle

Which scientist is credited with explaining that all the planets revolve around the sun in elliptical orbits and that the sun is not the exact center of those orbits?

• Isaac Newton

• Johannes Kepler

• Galileo Galilei

• Nicholaus Copernicus

The Big Bang is considered a theory because —

• it offers an explanation for observed patterns in nature

• it provides photographic evidence of a historical event

• it predicts future events within the universe

• it provides a tentative account for a set of facts

The vast majority of galaxies in our universe are moving away from us.  We know this because we observe __________ in the galaxies absorption spectra.

• Redshift
• Blueshift
• Turbulance
• Superposition