OpenSci Ed Earth in Space

Earth spinning on its axis is called its ___.

• orbit
• cycle
• rotation
• revolution

Which of the following events occurs once every 24 hours?

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

When the North end of Earth's axis is tilted toward the sun, ___.

• it is winter in the Southern Hemisphere
• the sun is farthest south of the equator
• the sun is low in the sky in the Northern Hemisphere
• it is summer in the Southern Hemisphere

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

• 365
• 365.25
• 364
• 366

Tides occur because....

• the sun and moon are the same distance from Earth

• the sun and moon are at right angles

• the gravitational pull of the moon

• the Earth spins really fast

The two days which are longest and shortest are called?

• Eclipse

• Solstice

• Neap Tide
• Spring Tide

A tide with the largest difference between low and high tides is called a ___.

• Spring tide
• Neap tide
• Solar eclipse
• Lunar eclipse

A solar eclipse occurs only when the moon is in the ___ phase.

• 1st quarter
• New Moon
• Full Moon
• 3rd quarter

In one year, Earth completes 365 ___.

• Revolutions
• Rotations
• Orbits

The ___ occurs during a full moon when Earth is directly between the moon and the sun.

• lunar eclipse
• solar eclipse
• earthly eclipse