Motions of the Earth

How were you able to tell that the Earth is in motion?

• it DOESN'T because the planets revolve around earth

• because we have 24 hours to revolve on the axis

• because we don't have seasons near the equator

• because we have night and day

When it is winter in the Northern Hemisphere, what's the season in the Southern Hemisphere?

• Winter

• Spring

• Summer

• Fall

A leap year has _______ number of days.

• 365.25

• 365

• 366

• 366.25

In which direction does the earth rotates on its axis?

• east to west

• west to east

• north to south

• south to north

What will happen if the axis is not tilted?

• we have winter, spring, summer and fall

• the sun would exactly rise in the east and sets on the west in the equator

• the axis will be dividing the day and night

• the northern hemisphere will only be experiencing daylight

In which month is the Earth nearest to the Sun?

• January

• February

• March

• July

Why is the sidereal day shorter than that of the mean solar day?

• The measurement of the mean solar day is the re-occurrence of a star.

• The measurement of the sidereal day is the re-occurrence of noon.

• The re-occurrence of noon requires an additional minutes with respect to the Sun.

• The movement of the Sun with respect to another star takes an additional four minutes.

Why do poles experience 6 months of daylight and 6 months of night time?

• due to the earth's rotation

• due to the earth's revolution

• due to the earth's tilt

• due to the earth's axial precession

The circle/line that divides the day and night.

• axis

• arctic circle

• antarctic circle

• none

Twice a year when the noon sun falls directly on Earth's surface between 23.5 degrees North and South, a(n) __________________ occurs.

• Summers

• Solstices

• Winters

• Equinoxes