Motions of Earth Review

What is the main motion of Earth that causes day and night?

• Rotation

• Precession

• Orbit

• Revolution

What is the time interval from one noon to the next known as?

• Tropical day

• Sidereal day

• Solar day

• Lunar day

What is the average speed at which Earth revolves around the sun?

• 93,000 miles per hour

• 66,500 miles per hour

• 107,000 kilometers per hour

• 150,000 kilometers per hour

At which point in its orbit is Earth closest to the sun?

• Perihelion

• Solstice

• Aphelion

• Equinox

When does perihelion occur each year?

• July 4th

• January 3rd

• March 20th

• December 21st

What is the apparent annual path of the sun against the backdrop of the celestial sphere called?

• Equator

• Ecliptic

• Meridian

• Zenith

What is the average distance of Earth from the sun?

• 147 million kilometers

• 152 million kilometers

• 150 million kilometers

• 155 million kilometers

What is the slight movement of Earth's axis over a period of 26,000 years known as?

• Precession

• Revolution

• Orbit

• Rotation

What is the time it takes for a star to reappear at the identical position in the sky where it was observed the day before known as?

• Tropical day

• Sidereal day

• Solar day

• Lunar day

At which point in its orbit is Earth farthest from the sun?

• Solstice

• Equinox

• Perihelion

• Aphelion