Life and Earth Review

Which of the planets are in our solar system’s “habitable zone?”

• Only Earth

• Earth and Mars

• Mercury, Venus, Earth, Mars, and Jupiter

• Earth, Mars, Jupiter, Saturn, Neptune, and Uranus

Why are planets outside of the habitable zone not suitable for life?

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Venus is nicknamed Earth’s twin planet. Why can life not exist on Venus?

• Venus orbits the sun at a closer distance than Earth does, affecting the atmosphere and presence of water.

• Venus orbits the sun at a greater distance than Earth does, affecting the atmosphere and presence of water.

• Venus has not yet been explored, so we are not sure whether or not life can exist on the planet.

• Venus orbits the sun at a closer distance than Earth does, affecting its size and structure.

Choose some requirements necessary for Earth to allow life to exist. Select three answers.

• Percentage of landmass

• Presence of water

• Composition of the atmosphere

• Proximity to the sun

• Size of the planet

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What would happen if Earth moved farther from the sun? Choose all correct answers.

• The energy needed for biological processes would decrease.

• Water would turn to ice.

• Water would evaporate.

• Oxygen in the atmosphere would escape to space.

• The atmosphere would open for UV ray penetration.

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Which planet can be found in the habitable zone?

• Mercury
• Saturn
• Earth
• Uranus

According to Dr. Edgar, a planetary geologist, a planet needs two things to be habitable. What are they?

• frozen water and liquid water

• liquid water and plants

• soil and oxygen

• liquid water and an energy source

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Imagine you're an Astrobiologist like Abigail, Mason, and Mia. What three key elements would you look for when exploring life beyond Earth?

• water vapor and food

• food, water, and shelter

• liquid water, an oxygen-containing atmosphere, and an energy source

• none of these

The further a planet is from the sun the __ it is.

• colder

• hotter

• smaller

• larger

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What harmful effect can the sun have for life on Earth? 

• Increasing green energy with solar panels and wind turbines
• Vitamin D deficiency and bone loss
• Plants and animals dying by dehydration
• Ultraviolet radiation causes skin damage, leading to skin cancer

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