Earth in the Universe

Why are there high and low tides on Earth?

• They are due to changes in the moon’s tilt on its axis.
• They are due to the gravitational pull between Earth and the moon
• They are due to the magnetic force between Earth and the moon
• They are due to changes in the moon’s speed every month

Which contributes to Earth’s ability to sustain life?

• The atmosphere allows all of the sun’s radiation to enter due to Earth’s distance from the sun.
• The atmosphere prevents all space debris from reaching the surface due to the ozone layer.
• The atmosphere is extremely thin due to the temperatures of the sun
• The atmosphere is breathable due to the unique mixture of gases

How does gravity support life on Earth?

• by forcing Earth to continuously spin on its axis, which contributes to day and night
• by causing changes in the distance between Earth and the sun, which contributes to the seasons
• by keeping water and gases in the atmosphere close to Earth’s surface, which contributes to life processes
• by preventing meteors and comets from hitting Earth’s surface, which protects living organisms from space fragments

Why does Earth have different seasons?

• because of the distance between Earth and the sun
• because of the speed of Earth as it rotates on its axis
• because of the amount of light blocked by the moon on its axis
• because of the tilt of Earth on its axis as it moves around the sun

Which best explains why the moon has phases?

• The moon’s position changes in relation to the sun and Earth.
• The sun’s position changes in relation to the moon and Earth.
• The Earth casts a shadow on the moon as it rotates.
• The moon rotates along its axis.

Which factor makes Earth different from all the other planets in the solar system inits ability to support life?

• The Earth is exposed to rays from the sun.
• The Earth has only one moon that orbits around it.
• The Earth rotates in an elliptical orbit around the sun.
• The Earth has a breathable atmosphere.

Which represents information that is gained as a result of space exploration?

• weather and climate patterns that occur on Earth
• existence of the sun and the moon in the solar system
• how to use coal and natural gas as energy resources
• location of plates found upon Earth’s surface