1) Why is Venus often called Earth’s sister planet? a) Has oceans b) Similar size/composition c) Same atmosphere d) Supports life 2) What gas makes up most of Venus’s atmosphere? a) Oxygen b) Nitrogen c) Carbon dioxide d) Hydrogen 3) Why are surface temperatures on Venus so high? a) Slow rotation b) CO2 traps heat c) Closer to Sun d) Sulfuric acid clouds 4) What surrounds Venus in addition to carbon dioxide? a) Oxygen clouds b) Sulfuric acid clouds c) Dust storms d) Water vapor 5) What is unusual about Venus’s rotation? a) Rotates quickly b) East to west c) Doesn't rotate d) 24-hour rotation 6) On Venus, how long does one full rotation take compared to Earth days? a) 100 Earth days b) 225 Earth days c) 243 Earth days d) 365 Earth days 7) How long does Venus take to orbit the Sun? a) 365 Earth days b) 243 Earth days c) 225 Earth days d) 180 Earth days 8) What do scientists believe once existed on Venus? a) Oceans b) Forests c) Ice caps d) Mountains 9) Why do scientists study Venus today? a) Find alien life b) Understand climate change c) Plan colonization d) Learn about Mars 10) Which of the following best describes Venus today? a) Mild temperatures b) Cold with oceans c) Hot, toxic, acidic d) Similar to Earth

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