ENV1: Many Planets, One Earth

Which of these are common between the Earth and Venus?

• Greenhouse Effect
• Magnetic Field
• Liquid Water
• None of the Above

Which of these are common between the Earth and Mars?

• Greenhouse Effect
• Magnetic Field
• Liquid Water
• Rocky body

Which of these is not important for liquid water to exist on planet earth?

• distance from sun
• greenhouse effect
• presence of H2O
• magnetic field

The region of space around a star where liquid water is able to exist is called the ___________.

• habitable zone
• habitual zone
• habitat zone
• liquid water zone

Which of these would not affect the temperature on a planet or moon?

• thickness of atmosphere
• gravitational squeezing by a larger body
• breakdown of radioactive elements
• presence of oxygen

Oxygen in the Earths atmosphere was created by

• volcanoes
• comets
• single celled organisms
• the sun

Which of these add CO2 to the Earths atmosphere?

• volcanoes
• comets
• single celled organisms
• the sun

the percentage of sunlight that is reflected by a planet or moon.

• albedo
• cyanobacteria
• geochemical cycling
• oxidation

single celled organism capable of photosynthesis

• albedo
• cyanobacteria
• geochemical cycling
• oxidation

pathway that chemicals take to come to the surface of the earth.

• albedo
• cyanobacteria
• geochemical cycling
• oxidation