Astronomy Unit Test Review

What would most likely happen if Earth rotated faster?

• A day would be shorter

• The year would be shorter

A student observed the constellation Orion at 9 o’clock at night. She looked again at 11 o’clock and noticed that Orion was in a different part of the sky. Why did it seem to move?

• Orion rotated and faced a different part of the sky

• Earth rotated and now faced a different part of the sky

The force that holds the planets in orbit around the sun is called?

• Rotation

• Friction

• Pressure

• Gravity

A __________ is the movement of Earth when it travels around the sun.

• Revolution

• Rotation

A __________ is the spinning of Earth on its axis. It takes 24 hours.

• Revolution

• Rotation

What determines the measurement of a full year on Earth?

• Hemisphere

• Rotation

• Axis

• Revolution

Which best describes the seasons experienced in the Northern Hemisphere compared to the Southern Hemisphere?

• They experience opposite seasons

• They do not ever experience similar seasons

• They experience the same seasons at the same time

• None of these

Astronomy is

• the study of asteroids

• the time required for Earth to orbit once around the sun

• the time required for the Earth to rotate once on its axis

• the study of the universe

A light-year is

• the distance that light travels in one year

• a small, hot, dim star that is the leftover center of an old star

• a large, reddish star late in its life cycle

• a gigantic explosion in which a massive star collapses and throws its outer layers into space

A black hole is

• an average star

• a rapidly spinning neutron star that emits rapid pulses of radio and optical energy

• a star that has collapsed under gravity

• an object so massive and dense that even light cannot escape its gravity