Astronomy Unit 1 Exam

Earth’s spinning on its axis is called its

• cycle

• revolution

• orbit

• rotation

Which of the following events occurs once every 365.25 days?

• The moon rotates on its axis

• The moon revolves around Earth

• Earth rotates on its axis

• Earth revolves around the sun

When the south end of Earth’s axis is tilted toward the sun

• it is summer in the Northern Hemisphere

• it is winter in the Northern Hemisphere

• the sun is low in the sky in the Southern Hemisphere

• the sun is farthest north of the equator

The two days of the year when neither hemisphere is tilted toward the sun are known as

• equinoxes

• solstices

• the Tropics

• the poles

In one year, Earth completes 365

• rotations

• revolutions

The day in March on which the sun is overhead at noon at the equator is called the

• vernal solstice

• autumnal solstice

• vernal equinox

• autumnal equinox

Why does the Earth experience seasons?

• Earth's Tilt

• Earth's Rotation

• Gravity

• Inertia

What season is it in the Northern Hemisphere when the Northern Hemisphere is pointed toward the sun and the sun hits the Northern Hemisphere most directly?

• Winter

• Summer

• Spring

• Autumn

If you could look down on the Earth from above the North Pole, it would appear to be:

• moving counterclockwise

• moving clockwise

• stationary

Summer is hot and winter is cold because

(choose all that are correct)

• summer days are longer than winter days.

• the noon sun is higher in summer than in winter.

• Earth is closer to the Sun in summer than it is in winter.