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TOC: The Nine Planets & Other Space Objects 12/8/12

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- Starter:
Calculate the density of an object that has a volume of 75ml and a mass of 450g.

Next, calculate the density of this object if its volume changed to 900.

- Write Planets Notes in this section

The Nine Planets & Other Space Objects

- Inner Planets: Terrestrial Planets
- Outer Planets: Gas Giants

- 1 Revolution = 1 trip around the sun = 1 year
- 1 Rotation = 1 complete spin = 1 day

- Mercury
- Venus
- Earth
- Mars

- Mercury - closest to sun
- Weight 38% of what you weigh on Earth (less gravity)
- Year – 1 revolution is 88 days long!!!
(Birthday every 88 days!!!)

- Day – 1 rotation takes 58 earth days
- Diameter 4,879 km

- Venus - Second from sun
- Weight 91% of what you weigh on Earth (less gravity)
- Year – 1 revolution is 244 days, 17 hours!!!
- Day – 1 rotation takes 243 earth days
- Diameter 12,104 km

- Earth - third from sun
- Weight 100% of what you weigh on Earth
- Year – 1 revolution is 365 days, 6 hours!!!
- Day – 1 rotation takes 24 hours, 56 minutes
- Diameter 12,756 km

Mars - fourth from sun

- Weight 38 % of what you weigh on Earth
- Year – 1 revolution is 687 days!!!
- Day – 1 rotation takes 24 hours, 37 minutes
- Diameter 6794 km

- Jupiter
- Saturn
- Neptune
- Uranus

Jupiter - fifth from sun

- Weight 236 % of what you weigh on Earth
- Year – 1 revolution is 11 years, 313 days!!!
- Day – 1 rotation takes 9 hours, 50 minutes
- Diameter 142,984 km

Saturn - sixth from sun

- Weight 92 % of what you weigh on Earth
- Year – 1 revolution is 29 years, 155 days!!!
(29 years before you have a birthday!!!!!!!)

- Day – 1 rotation takes 10 hours, 30 minutes
- Diameter 120,536 km
- Rings- made of icy particles

Uranus - seventh from sun

- Weight 89 % of what you weigh on Earth
- Year – 1 revolution is 83 years, 274 days!!!
- Day – 1 rotation takes 17 hours, 14 minutes
- Diameter 51,118 km

Neptune- eighth from sun

- Weight 112 % of what you weigh on Earth
- Year – 1 revolution is 163 years, 263 days!!!
- Day – 1 rotation takes 16 hours, 7 minutes
- Diameter 49,528 km

What do you notice at first glance about the difference of terrestrial and gas giants?

- Satellites or natural bodies hat revolve around a larger body
- All planets have moons except Mercury and Venus

- discovered in 1610 by Galileo
- Io – most volcanic object in solar system
- Europa - may have liquid water beneath its icy surface
- Ganymede - largest of the four, larger than Mercury
- Callisto – third largest moon in solar system, made of rock and ice

- Small body of ice, rock, and cosmic dust loosely packed together
- When comet comes close enough to the sun, it heats up and gives off gas and dust in the form of a tail
- Elliptical orbit around the sun

- Small rocky bodies that revolve around the sun
- Up to 900 km in diameter
- Mostly spherical
- Found in between Mars and Jupiter in the Asteroid Belt

- Small rocky boy that revolves around the sun
- Smaller than asteroids (pieces of asteroids)
- Becomes a Meteorite when it hits the surface of Earth

- Shooting Star- Meteors are bright streaks of light that occur when a meteoroid or comet burns in the atmosphere
- Meteor Showers - when Earth passes through dusty debris that comets leave behind

- Complete and glue in your foldable into this section.

- Why is studying other planets important ? How does it help us learn more about our planet?

- Summarize everything you learned. Include any questions you may still have.