ASTR 1000 Review

Suppose we look at a photograph of many galaxies. Assuming that all of these galaxies formed at the same time after the Big Bang, which galaxies, as seen in the photo, would appear to be the youngest?

• All of the galaxies would appear to be at the same age.

• those galaxies whose actual size is small

• 
  those galaxies that are the furthest away

• those galaxies that appear to be the bluest

Galileo observed all of the following. Which observation offered direct proof of a planet orbiting the Sun?

• 
  the Milky Way is composed of many individual stars

• 
  phases of Venus

• 
  four moons orbiting Jupiter

• 
  patterns of shadow and sunlight near the dividing line between the light and dark portions of the Moon's face

Tags

NGSS.HS-ESS1-4

According to Kepler's THIRD Law:

• Jupiter orbits the Sun at a faster speed than Saturn.

• Mercury travels fastest when it is closest to the Sun.

• eventually the Moon will escape from Earth orbit.

• 
  all the planets have nearly circular orbits.

Tags

NGSS.HS-ESS1-4

Which of the following statements about lunar phases is true?

• 
  The full moon sometimes rises around midnight.

• 
  It is possible to have two full moons during November, but not during December.

• 
  It is possible to have two full moons during January, but not during February.

• 
  The time between new moons is two weeks.

Tags

NGSS.MS-ESS1-1

Which of the following best explains why the Moon's orbital period and rotation period are the same?

• The Moon was once closer to Earth, but the force of gravity got weaker as the Moon moved farther away.

• The law of conservation of angular momentum ensured that the Moon must have the same amount of rotational angular momentum as it has of orbital angular momentum.

• 
  The equality of the Moon's orbital and rotation periods is an extraordinary astronomical coincidence.

• The Moon once rotated faster, but tidal friction slowed the rotation period until it matched the orbital period.

Tags

NGSS.HS-ESS1-4

Why does it take almost 30 days for the Moon to complete a cycle of phases when it only takes just over 27 days to orbit the Earth?

• During the 27 days the Earth has moved in its orbit around the Sun.

• 
  The Moon's orbit is tilted with respect to the Earth's orbit around the Sun.

• 
  The Moon does not rotate  on its axis.

• 
  The Moon speeds up and slows down as it orbits the Earth.

Tags

NGSS.MS-ESS1-1

Currently, the largest visible light telescopes on Earth have diameters of

• 8-10 meters.

• 
  3000-5000 meters.

• 
  30-50 meters

• 300-500 meters.

Tags

NGSS.HS-PS4-3

How does the light-collecting area of an 8-meter telescope compare to that of a 1-meter telescope?

• 
  The 8-meter telescope has 4 times the light-collecting area of the 1-meter telescope.

• 
  The 8-meter telescope has 8 times the light-collecting area of the 1-meter telescope.

• The 8-meter telescope has 64 times the light-collecting area of the 1-meter telescope.

• 
  The answer cannot be determined from the information given in the question.

The following statements are all true. Which one counts as an "exception to the rule" in being unusual for our Solar System?

• Jupiter has a very small axis tilt.

• 
  Venus does not have a moon.

• 
  Earth has a large moon.

• 
  Saturn has no solid surface.

Why are terrestrial planets more dense than the jovian planets?

• Only dense materials could condense in the inner solar nebula.

• 
  Gravity compresses terrestrial planets to a higher degree, making them denser.

• The Sun's gravity pulled dense materials into the inner solar system.

• Because the jovian planets are more massive than the terrestrials, the jovians must be more dense.