Chapter 2 Earth in Space

_______ are caused by the gravitational pull of the Sun, moon and Earth

• Biosphere

• Southern Cross

• North Star

• Tides

Earth revolves around the Sun in ______ days.

• Once every two weeks

• 48 hours

• 356 1/4

• 24 hours

Earth's _______ holds the atmosphere around the planet.

• Gravity

• tides

• North Star

• solar system

The North Pole points toward the _____ _____.

• elliptical

• North Star

• Spring equinox

• Winter Solstice

The ocean floor is part of the _________.

• lithosphere

• Blogosphere

• elliptical

• water

The Sun is about _______ times larger than Earth.

• 250

• 200

• 100

• 500

Earth is different from all the other planets in the solar system because it has ________.

• solar energy

• environment

• carbon

• water

In the Northern Hemisphere, the March equinox marks the beginning of _______.

• Fall

• Spring

• Winter

• Mid summer night

The planets are visible because they ______ sunlight.

• fade

• sparkle

• shine

• reflect

Match the following

• revolution

• The time that the Earth's poles are at their greatest angle toward or away from the sun.

• Environment

• The solid crust of the planet

• Solar energy

• All the biological, chemical, and physical conditions that interact & affect life.

• lithosphere

• Energy from the sun

• solstice

• One elliptical orbit of the Earth around the sun.