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Ch. 18 Lesson 2What are the inner
planets?
The Inner Planets
Mercury•Little bigger than Earth’s moon
•covered w/ craters
• No atmosphere- very hot during day & cold @ night
• Visited by Mariner 10 space probe
• no moons
Venus•Thick atmosphere of sulfuric acid clouds
•No moons
Venus•About same size as Earth
•Brightest object in night sky
Earth•only planet w/ life & liquid water
•protected by atmosphere
•1 moon
Mars•“Red Planet”- iron oxide
•2 moons- Phobos & Deimos
•2 moons- Phobos & Deimos
Mars rovers1.Sojourner
2.Viking 1
3.Spirit & Opportunity
•many volcanoes
Mars
Name that inner
planet
no moons
only planet with life
“Red Planet”
about same size as Earth
2 moons
poisonous clouds
no atmosphere
brightest object in night sky
similar to Earth’s moon
visited by rovers
covered with craters
liquid water
covered with iron oxide
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