Introduction to Planet Earth Study Guide Review

Which of Earth's spheres contains mountains, valleys, and other landscapes?

• atmosphere

• biosphere

• geosphere

• hydrosphere

Which of the following are examples of destructive forces?

• ice

• wind

• both ice and wind

• neither ice nor wind

Earth appears to be mostly blue when viewed from space because it is mostly covered by

• water.

• oxygen.

• carbon dioxide.

• ozone.

Which of the following keeps Earth from falling into the sun?

• its size relative to its shape

• its location in the solar system

• its gravitational pull

• its inertia

Which of the following causes day and night?

• the changing seasons

• the revolving Earth

• the rotating Earth

• the evolving sun

Answer explanation

One revolution of Earth around the sun takes

• one day.

• one week.

• one month.

• one year.

Answer explanation

Which of the following geographic locations is least affected by seasons?

• the Northern Hemisphere

• the equator

• the Southern Hemisphere

• Australia

The phase of the moon you see depends on which of the following?

• where you are on Earth’s surface

• how much of the sunlit side of the moon faces Earth

• how much of the moon’s surface is lit by the sun

• whether or not an eclipse is occurring

Which of the following causes an eclipse?

• when an object in space comes between the sun and a third object

• when an object in space comes between the moon and Earth

• when a meteorite hits Earth

• when a large cloud passes over the sun

Which of the following greatly contributes to the cause of tides?

• Earth’s rotation on its axis, which causes water to move

• strong winds blowing water onto coasts

• differences in how much the sun pulls on different part of Earth

• differences in how much the moon and the sun pull on different parts of Earth