30.2 Science Flashcards
smallest and closest to the Sun
Mercury
Second closest to the Sun
Venus
third planet from the sun
Earth
fourth planet from the Sun
Mars
How did the solar system form?
From a nebula that collapsed
How long ago was the solar system formed?
4.6 billion years ago
What is Mercury´s atmosphere like?
Has no true atmosphere
Which planet is referred to Earth´s sister planet?
Venus
What is Venus´ atmosphere like?
Dense, hot atmosphere
What states can water be formed as?
Solid,liquid, and gas
What is another name for Mars?
The Red Planet
Why is Mars red?
Due to the iron oxide
How many moons does Mars have?
2 moons
What are Mars moons called?
Phobos and Deimos
What does the greek word Phobos mean?
Fear
What does the greek word Deimos mean?
Panic
What was the mission of Spirit and Opportunity on Mars?
To search for liquid water on Mars
What did Mars Reconnaissance Orbiter discover?
Sediment layering and gullies
What did Mariner 9 discover?
Large canyon (Valles Marineis) and extinct volcanoes
What did Viking 1 and Viking 2 probes do?
Photographed the entire surface of Mars from orbit
What was Global Surveyor do?
It showed the walls of Valles Marineis had similar layers as the Grand Canyon?
What evidence did the Mars Odyssey provide?
Water is frost beneath the thin layer of Mars surface
What data was gathered by the Pathfinder and its rover Sojourner?
That iron may have been leached out by groundwater
Where did the Curiosity rover land on Mars?
The Gale crater?
