Astronomy Astronomy MCQ 3

Question 1

A star's color is primarily an indicator of its what?

Accepted Answer

Surface temperature

Answer

Blue stars are hotter and red stars are cooler, so color tracks surface temperature.

Question 2

What is a light-year a measure of?

Accepted Answer

Distance

Answer

A light-year is the distance light travels in one year, about 5.9 trillion miles.

Question 3

Which layer of the Sun do we see as its visible surface?

Accepted Answer

Photosphere

Answer

The photosphere is the layer that emits the visible light we observe.

Question 4

What is the most likely fate of a low-mass star like the Sun?

Accepted Answer

White dwarf

Answer

After shedding its outer layers, a Sun-like star leaves behind a hot, dense white dwarf.

Question 5

Which planet rotates on its side with an axial tilt near 98 degrees?

Accepted Answer

Uranus

Answer

Uranus has an extreme tilt, likely caused by a giant collision, so it rolls along its orbit.

Astronomy Practice Test