QUESTION 2 A light-year equals the a.distance light travels through space in 1 E

Question

QUESTION 2

A light-year equals the

a.distance light travels through space in 1 Earth day in a vacuum.

b.distance light travels through space in 1 Earth month.

c.time it takes light to travel through space in 1 Earth year.

d.distance light travels through space in 1 Earth year in a vacuum.

QUESTION 3

Using the Doppler effect, astronomers can

a.calculate the velocity Earth's moon is moving toward Earth.

b.calculate the distance from Earth to the Moon.

c.detect whether a celestial object is moving away or towards the observer.

d.detect a celestial object's chemical composition.

QUESTION 4

Hubble's law is used to

a.measure the distance to the most remote objects in space.

b.measure the composition of the remote objects in space.

c.measure the temperature of the most remote objects in space.

d.calibrate the distance between Earth and the Sun.

QUESTION 5

Planets move from east to west across Earth's sky. This movement is called __________ motion.

a.orbital

b.retrograde

c.prograde

d.ecliptic

QUESTION 6

Sir Isaac Newton, a major contributor to modern science, proposed the three laws of motion and the law of gravity. Which of the following best describes his law of gravity?

a.Every object in the Universe attracts every other object

.b.When force acts on a mass, it causes the mass to change speed or direction.

c.For every action there is an equal and opposite reaction.

QUESTION 7

A(n) ________represents the distance that an imaginary star would have to be from Earth for its parallax to be exactly 1 arc-second if you were to move from an observation point in the center of the Sun to the center of Earth.

a.parallax

b.astronomical unit

c.parsec

d.kilometer

Explanation / Answer

Question 2-  

(d) distance light travels through space in 1 earth year in a vacuum

Question 3-

(C) detect whether a celestial object is moving away or towards the observer

Question 4-

(a) measure the distance to the most remote object in a space

Question 5-

(b) retrograde

Question 6-

(a) every object in the universe attract every other object

Question 7-

(a) parallax

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