List the phrase & order of the planet from Sun to Space

• My = Mercury• Very = Venus• Educated = Earth• Mother = Mars• Just = Jupiter• Served = Saturn• Us = Uranus• Nine = Neptune• Pizzas = Pluto

List the phrase & order of the planets from smallest to largest!• Probe = Pluto• Magellan = Mercury• Mapped = Mars• V = Venus• E = Earth• N = Neptune• U = Uranus• S = Saturn• Jupiter

Mercury• Inner Planet• Terrestrial Planet• 0 moons• 0 rings• No atmosphere

(burned off by sun)• Widest

Temperature Range

• Cratered surface

Venus• Inner Planet• Terrestrial Planet• 0 moons• 0 rings• CO2 & Sulfuric acid in

atmosphere• Thick & cloudy

atmosphere• Greenhouse effect• Hottest Planet• Retrograde Rotation• Twin of Earth

Earth• Inner Planet• Terrestrial Planet• 1 moon• 0 rings• Oxygen & Nitrogen

atmosphere• 70% covered with

Water• Life• Tilted on Axis• Seasons

Mars• Inner Planet• Terrestrial Planet• 2 Moons• 0 Rings• Thin CO2• Tilted Axis• Seasons• Iron Oxide (Rust) -

Dusty• Red Planet

Jupiter• Outer Planet• Gas Giant• Many Moons• Rings• Hydrogen (H) &

Helium (He)• Largest Planet• Great Red Spot

Saturn• Outer Planet• Gas Giant• Many Moons• Most Rings• H & He• Least dense

planet – could float in water

Uranus• Outer Planet• Gas Giant• Many Moons• Rings• H & He & Methane• Blue-green in

color• Tilted on side

(90°)

Neptune• Outer Planet• Gas Giant• Many Moons• Rings• H & He & Methane• Blue in color• Discovered by

mathematical prediction

• Can switch places with Pluto – sometimes last planet from sun

Pluto• Outer Planet• 1 Moon (Charon) + 2

smaller ones• 0 Rings• Unknown Atmosphere• Scientists reclassified

as dwarf planet• Known as double

planet –Charon is more than ½ its size

• Like a terrestrial planet

Inner Planets vs. Outer Planets

Inner Planets

•Mercury•Venus•Earth•Mars

Outer Planets

•Jupiter•Saturn•Uranus•Neptune

Inner Planets vs. Outer Planets

• Small vs. Large• Rocky vs. Made up of Gases• 0-2 Moons vs. Many Moons• No Rings vs. Have Rings• Before AB vs. After Asteroid Belt• Varied vs. Mostly H & He

atmospheres atmosphere• Fast revolu- vs. Slow revolution

time tion time

Inner Planets vs. Gas Giants

In Common:• Revolve around the Sun• Rotate on axis• Elliptical orbits• All affected by their own inertia and the sun’s

gravity• Each planet has its own gravity• Shaped the same – like sphere• In the Milky Way Galaxy• Named after Roman Gods• All visited by a Space probe

How does Pluto fit in?More like a terrestrial

planet• Small• 1 Moon/2 smaller ones

discovered• No rings• Solid? Not made up of

as much gas1 Theory: Pluto could be

a moon that escaped Neptune’s gravity.

Why is Pluto a Dwarf Planet?Characteristics of a Dwarf Planet:

•Orbits the Sun & is not a moon•Has enough mass so its gravity pulls it into a sphere•Other objects are in its orbital path•Smaller than Mercury

Other dwarfs: Ceres, Eris, Makemake, & Haumea