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Venusian Atmosphere Trivia Questions

How much do you really know about Venusian Atmosphere? Below are 8 true or false statements. Click each one to reveal the answer and explanation.

1.

Venus's atmosphere contains large amounts of oxygen, making it breathable at high altitudes.

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Easy
✗ FALSE

Venus's atmosphere is 96% carbon dioxide and only trace amounts of oxygen. It is toxic and unbreathable at any altitude.

2.

The clouds on Venus are made mostly of water vapor, similar to Earth's clouds.

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Medium
✗ FALSE

Venus's clouds are primarily composed of sulfuric acid droplets, not water vapor. This makes them highly corrosive and reflective.

3.

Venus has a thin ozone layer that protects its surface from most ultraviolet radiation.

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Medium
✗ FALSE

Venus has no significant ozone layer. Its thick clouds block some UV, but any ozone detected is minimal and offers no surface protection.

4.

Because it's closer to the Sun, Venus is significantly hotter than Mercury during the day.

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Medium
✓ TRUE

Venus's thick carbon dioxide atmosphere creates a runaway greenhouse effect, making its surface 870°F—hotter than Mercury, which lacks an atmosphere.

5.

Venus's atmosphere is so thick that walking on its surface would feel like being underwater.

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Medium
✓ TRUE

Venus's atmospheric pressure at the surface is about 90 times that of Earth's, equivalent to being nearly a kilometer deep in an ocean.

6.

Venus once had oceans of water, but a runaway greenhouse effect boiled them away.

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Hard
✓ TRUE

Evidence suggests Venus had liquid water for billions of years before extreme heat from the Sun caused catastrophic evaporation and loss of hydrogen to space.

7.

Venus's atmosphere rotates much faster than the planet itself, a phenomenon called super-rotation.

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Hard
✓ TRUE

The upper atmosphere of Venus circles the planet in about 4 Earth days, while the surface rotates once every 243 days—a bizarre super-rotation.

8.

Scientists have detected phosphine in Venus's clouds, a possible sign of microbial life.

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Hard
✓ TRUE

In 2020, researchers reported phosphine in Venus's atmosphere—a gas that on Earth is produced by microbes. The finding remains debated but is not disproven.

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