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How many planets are in the Solar System? 8
Name the eight planets in the correct order as they gofrom the sun. Mercury Venus Earth Mars Jupiter Saturn Uranus Neptune Pluto Clue: My Very Eager Mother Just Sold Us Nine Pizzas
What are the four inner planets? Mercury Venus Earth Mars
What are the four outer planets? Jupiter Saturn Uranus Neptune
What splits the four inner planets from the four outer planets? Asteroid Belt
What is the farthest planet from the sun? Neptune
What is the sun? Average-size star that gives off light
What two things are the sun composed of? Hydrogen and Helium
What are stars? Huge balls of gas
What is an orbit? A path that planets follow around the sun!
What orbits around the Sun? Planets
What does the Earth orbit? Sun
What does the moon orbit? Earth
What two things keep the planets in orbit and how? Gravity: Force that pulls the planets toward the Sun Inertia: A moving object that tends to keep moving in a straight line
What would happen to the planets if gravity were only working? Pulled into the Sun
What would happen to the planets if inertia was only working? Go in a straight line and fly off into space
Why does life exist on Earth and not on other planets in our solar system? 1.Right Temperature 2.Air 3.Water 4.Resources
What is a day? What is the reason for night and day? A day is the amount of time it takes a planet to complete one spin. When the Earth spins, then only one side can be facing the Sun.
Name some characteristics of the moon. 1.No water 2.No air 3.No weather 4.Temperature changes greatly 5.Rocky Surfaces 6.Many craters
How long does it take for the moon to complete all of its phases? One Month
What is Earths nearest neighbor? Moon
What are constellations? Patterns formed by groups of stars in the night sky
Why do constellations appear to move across the sky? Because Earth rotates
Describe the inner planets. 1.Solid, rocky crusts 2.Have atmospheres 3.Do not have rings 4.Warmer Temperatures 5.Slow rotation time
What planet is the only one that can support life? Earth
Describe the outer planets. 1.Gaseous 2.Has rings 3.Cooler Temperatures 4.Many moons 5.Slow revolution time
What is an asteroid belt? Region between Mars and Jupiter where most asteroids are found.
What are asteroids? Minor Planet Small, rocky objects that orbit the Sun.
What are meteors? A chunk of rock from space that burns up as it travels through Earths atmosphere. A shooting star
What are meteorites? A chunk of rock from space that strikes the surface of Earth or the Moon.
What are comets? A dirty snowball orbiting the Sun- a mixture of ices, frozen gases, rock, and dust left over from the formation of the solar system.
What is a galaxy? A collection of billions of stars.
What is the Milky Way? Our galaxy
What is our solar system? The Sun and the objects that are traveling around it.
What is a planet? Any of the eight major objects that travel around the Sun and shine by reflecting its light.
What is gravity? The force of attraction between any two objects due to their mass.
What does revolve mean? To move around, or orbit, another object.
What is an orbit? The path a planet travels in as it goes around the Sun.
What are phases? As the moon travels around Earth, we see different amounts of its lighted half.
What effect is there because of the Earths tilt? Suns light shines differently throughout the year
What is an atmosphere? The blanket of gases surrounding the Earth
What is rotation time? Time it takes for a planet to turn on its axis (24 hours)
What is revolution time? Time it takes for a planet to orbit the Sun (One Year)
What is a light year? Distance light travels in a year 5.8 trillion miles
MERCURY 1.Closest planet to the Sun 2.Extremely hot and cold temperatures
VENUS Hottest planet
EARTH 1.Water Planet 2.Right temperature and resources for life 3.Revolution time: 1 year 4.Rotation time: 1 day
MARS 1.Largest volcano in our solar system 2.Red Planet
JUPITER 1.Largest planet 2.Gas Giant
SATURN Has most visible rings
URANUS Tilted Planet
NEPTUNE Twin Planet
PLUTO No longer a planet- dwarf planet
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The average distance from Earth to the sun is 1.1 ly 2.1 million km 3.1 million mi. 4.1 billion km 5.1 AU.
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