Earth & Moon in Space Review

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

Earth spinning on its axis is called its _. 

• revolution
• orbit
• rotation
• cycle

Which of the following events occurs once every 24 hours? 

• Earth revolves around the sun.
• The moon rotates on its axis.
• The moon revolves around the Earth. 
• Earth rotates on its axis. 

In a leap year, the number of days is _. 

• 365
• 366
• 364
• 365.25

Spring tides occur_. 

• when the sun and moon are at right angles to Earth
• when day and night are equal
• when the sun, moon, and Earth line up
• only when the sun and moon are the same distance from Earth

The tendency of an object to resist a change in motion is _. 

• inertia
• orbital motion
• gravity
• tidal friction

The pull of gravity on the surface of the moon is _. 

• six times that of Earth
• one quarter that of Earth
• one eightieth that of Earth
• one sixth that of Earth

Maria are _. 

• seas on the moon
• regions with many craters
• regions formed from huge lava flows
• lunar highlands

The darkest part of the moon's shadow is the _. 

• penumbra
• umbra
• solar eclipse
• new moon

A tide with the smallest difference between low and high tides is called a _. 

• neap tide
• spring tide