THE INNER AND OUTER PLANETS

SNC 1D

The Inner Planets

Terrestrial Rocky iron core High temperatures Closer to the Sun Closer to each other Smaller than the outer planets Slow rotation and fast revolution Few moons and no rings

Mercury Closest to the Sun Rotation: 59days Revolution: 88days Very Thin

Atmosphere: Helium, oxygen, hydrogen

Many craters Temperature

extremes 400°C during day, -

180°C at night

Mercury

Venus

Earth’s sister planet Rotation: 243 days Revolution: 225 days Thick Atmosphere: mostly

carbon dioxide, nitrogen and sulfuric acid

Longer day than year Spins opposite than other

planets Over 500°C all the time Cratered and volcanic surface

Venus

Earth Home sweet home Only planet with

sustained life Hydrosphere

(water) Atmosphere made

up of N2, O2, CO2 Rotation: 24 hours

Revolution: 365 days

1 moon

Earth’s Moon

The moon makes a complete orbit around Earth in 27 Earth days and rotates or spins at that same rate, or in that same amount of time. This causes the moon to keep the same side or face towards Earth during the course of its orbit.

rocky, solid-surface

very thin atmosphere

Mars Frozen polar CO2

caps Smaller than Earth Rotation: Slightly

longer than 24 hours

Revolution: 687 days

Very cold Largest mountain

in solar system Olympus Mons

Thin atmosphere of CO2, N2 and Ar

2 moons:Phobos and Deimos

known as the Red Planet due to rust in soil

Moons of Mars

Phobos orbits Mars three

times a day very close to surface

Deimos smaller of Mars'

two moons whirls around Mars

every 30 hours.

Mars