Gravity, Seasons, Moon, and Eclipses

Gravity is

• A repulsion between all objects in the universe

• inertia

• an attraction between all masses in the universe

• Newtonian Field

What two factors affect gravity?

• mass and size

• mass and distance

• force and motion

• weight and mass

What determines the orbit?

• speed

• gravity

• motion and gravity

• none of the above

During Iowa’s winter months, Earth’s Southern Hemisphere is experiencing

• winter

• spring

• summer

• fall

During Iowa’s summer months, Earth’s Northern Hemisphere is

• tilted away from the sun and receiving more direct rays

• tilted away from the sun and receiving fewer direct rays

• tilted toward the sun and receiving fewer direct rays

• tilted toward the sun and receiving more direct rays

Moon’s revolution and rotation are about

• 24 hours

• 1 year

• 12 hours

• 1 month

Earth's revolution around the sun is

• 24 hours

• 366 days

• 365 ¼ days

• 1 month

Earth's rotation on its axis takes

• 24 hours

• 365 days

• 30 days

• 16 hours

The moon is lit by

• light from Earth reflecting off its surface

• nuclear reactions taking place on its surface

• light from the sun reflecting off its surface

• glowing bacteria that live on its surface

When the moon passes between the Earth and the sun, a ________ eclipse can occur.

• Lunar

• Solar

• Earth

• Summer