Stars — Unit test

Question 1

Which is a type of star system?

Revolt · Accepted Answer

globular clusters

Question 2

What is the Milky Way?

Revolt · Accepted Answer

a spiral galaxy in which Earth is located

Question 3

In which direction does Earth rotate?

Revolt · Accepted Answer

eastward around its axis

Question 4

Which planet in the solar system is least dense?

Revolt · Accepted Answer

Saturn

Question 5

Which is the final event that occurs when a star is forming?

Revolt · Accepted Answer

Nuclear fusion begins under high pressure.

Question 6

What was discovered in 1965 and is believed to be leftover thermal energy from the big bang?

Revolt · Accepted Answer

background radiation

Question 7

Whose data did Kepler use to construct the laws of planetary motion?

Revolt · Accepted Answer

Brahe’s

Question 8

Lori attended a lecture about the Sun, and the presenter had placed this image on the wall. Which layer of the Sun could this image be referring to?

Revolt · Accepted Answer

the convection zone, because it shows how energy moves in a convection current

Question 9

Solar winds have an influence all the way to about 160 AU from the Sun. About how many kilometers is that?

Revolt · Accepted Answer

24,000,000,000 km

Question 10

Which quantity does a light-year measure?

Revolt · Accepted Answer

distance

Stars — Unit test Answers