30.2 Flashcards
the smallest planet and closest to the Sun
mercury
The second closest planet to the Sun
Venus
the third closest planets to the Sun
Earth
the fourth planet to the Sun
Mars
how did the solar system form?
a nebula collapsing
how long ago did the solar system form?
4.6 billion years ago
what type of atmosphere does Mercury have?
no true atmosphere
What is Earths sisters planet?
Venus
What is Venus atmosphere like?
very dense and hot atmosphere
what does Earth allow water as?
solid, liquid, and gas
Another name for Mars is…?
Red planet
Why is Mars red?
Because of the iron oxide
What are the names of the two moons in Mars?
Phobos and Deimos
What does Phobos mean?
Fear
What does Deimos mean?
Panic
What was Spirit and Opportunities mission?
to search for liquid water
What did Mars Reconnaissance orbiter discover?
Sediment layering and gullies
What did Mariner 9 Space probe discover?
Valles Marineris and Extinct volcanoes
What was the mission of Viking 1 and Viking 2?
it photographed the entire surface of Mars
What did global surveyor do?
discovered that the Valles Maineris walls are similar to the Grand Canyons?
What did the odyssey provide evidence for?
water is frost beneath the thin layer of soil
What data was gathered by the Mars Pathfinder and its rover Sojourner?
iron and Mars crust may have been leached out by groundwater
Where did the Curiosity rover land?
Gale Crater
What were the goals of Curiosity?
to investigate climate and geography,
to collect evidence for microbial life,
and studied for planet habitability
