PCA Venus Flashcards
What is the habitable zone in a planetary-star system?
The orbital distance range from a star where a planet could have liquid water on its surface depending on planetary conditions.
Why are Mars and Venus not habitable?
Both have a problem with their atmospheres.
How much of Venus’s atmosphere is carbon dioxide?
96%
What is the pressure of Venus’s atmosphere?
About 92 times the pressure of Earth’s atmosphere
What is the size of Venus compared to Earth?
About the same diameter of Earth
What is the surface temperature of Venus?
470 Celsius
What describes the greenhouse effect on Venus?
It has a very strong, supercharged, greenhouse effect.
What is the condition needed for a planet’s surface temperature to be in equilibrium?
The heat and light from the Sun must balance the heat radiated by the planet as infrared light.
What is a greenhouse gas?
A gas that absorbs and reflects infrared light.
How does plate tectonics determine if a planet has a strong, mild or weak greenhouse effect?
Plate tectonics can have a wild effect on the present greenhouse conditions.
