1. Our Solar System
Mrs. Lacks
6th Grade

2. Gravity Force of attraction between any 2 masses
*Weight – the measurement of gravity
*Gravitational force- keeps planets in orbit
Depends on:
Mass of each object
Distance between objects

3. Mercury: 38% of Earth’s Venus: 91% of Earth’s Earth: 100% of Earth’s Mars: 38% of Earth’s Jupiter: 254% of Earth’s Saturn: 108% of Earth’s Uranus: 91% of Earth’s Neptune: 119% of Earth’s Pluto: 8% of Earth’s So what this all means is that a person who weighs 100 pounds on Earth would weigh 38 pounds on Mercury or Mars, 91 pounds on Venus, 254 pounds on Jupiter (!!!), 108 pounds on Saturn, 91 pounds on Uranus, 119 pounds on Neptune, or only 8 pounds on Pluto.

4. Moons and Satellites Satellite- Moon-
Any object that orbits (revolves) around another larger object
Moon-
Natural satellite of a planet

5. THINK….
Write down the difference between rotation and revolution.

6. Stars Big ball of gas that gives off light and heat
The way it appears in sky depends on their distance to Earth
SUN- closest star to earth
Constellation- specific pattern of stars
Astronomy- study of stars/planets

7. Our Solar System Our solar system is made up of: Sun Eight planets
Their moons
Asteroids
Comets
Stars

8. Inner Planets- “Terrestrial” Planets
The inner four rocky planets at the center of the solar system are:
Mercury
Venus
Earth
Mars

9. Mercury Planet nearest the sun The smallest planet
Covered with craters
Has no moons or rings
About size of Earth’s moon

10. Venus Sister planet to Earth Has no moons or rings
Hot, thick atmosphere
Brightest object in sky besides sun and moon (looks like bright star)
Covered with craters, volcanoes, and mountains

11. Earth Third planet from sun
Only planet known to have life and liquid water
Atmosphere composed of composed of Nitrogen (78%), Oxygen (21%), and other gases (1%).

12. Mars Fourth planet from sun
Appears as bright reddish color in the night sky
Surface features volcanoes and huge dust storms
Has 2 moons: Phobos and Deimos

13. Outer Planets “Gas Giants”
The outer planets composed of gas are :
Jupiter
Saturn
Uranus
Neptune

14. Jupiter Largest planet in solar system Brightest planet in sky
60+ moons, 5 visible from Earth
Strong magnetic field
Giant red spot
Rings have 3 parts: Halo Ring, Main Ring, Gossamer Ring

15. Saturn 6th planet from sun Beautiful set of rings 31 moons
Largest moon, Titan,
Easily visible in the night sky
Voyager explored Saturn and its rings.

16. Uranus 7th planet from sun Has a faint ring system 27 known moons
Covered with clouds
Uranus sits on its side with the north and south poles sticking out the sides.

17. Neptune 8th planet from sun Discovered through math 7 known moons
Triton largest moon
Great Dark Spot thought to be a hole, similar to the hole in the ozone layer on Earth

18. Activity Come up with your own phrase to help you remember the planets
Starting with the planet closest to the sun
My Example:
“My Very Educated Mother Just Saw Uncle Ned”