2 Mercury Closest planet to the Sun Takes the least amount of time to orbit the SunNot large enough for its gravity to hold onto a moon or much of an atmosphere.No Moons
3 VenusThe surface is hot (869) and the atmosphere is dense and contains carbon dioxide and sulfuric acid.Second planet from the Sun
4 Earth Has volcanic eruptions and earthquakes. Sunlight, a nitrogen and oxygen-rich atmosphereLarge oceans and the greenhouse effect makes climates that supports life.Third planet from the Sun.
5 Mars The largest canyon in the solar system Called the Red Planet Valles Marineris, is as wide as the United States.Might have had running water at one time. Has ice capsLargest volcano in the solar system, Olympus Mons
6 Jupiter The largest planet has an atmosphere of cold hydrogen gas. It has many moons, so far 17 have been found.It has a giant red spot that is thought to be a storm
7 SaturnMostly gas, but less dense, making it very light that it could float on water.It has 18 moons.It is known for its beautiful rings which are made of millions of bits of ice.
8 Uranus Atmosphere of methane gas set of dark, narrow rings that run from top to bottom, instead of around.
9 Neptune Is the bluest planet because of its methane gas atmosphere Its moon, Triton, has volcanoesCrosses Pluto’s path as it orbits the SunHas a set of dark rings
10 Pluto Does not have a thick atmosphere Discovered in 1930 Has one moon called CharonSmallest planetCovered by layers of ice
11 AsteroidsA wide belt of small objects that orbit the Sun between Mars and Jupiter.Sometimes called minor planets.Might be the remains of planets pulled apart or leftovers from the formation of the solar system
12 Meteors Parts or pieces of meteoroids that fall from space No bigger than a grain of sandSometimes called a Shooting star.
13 MeteoroidsPart of the dust and gas trail left behind by a comet
14 MeteoriteA piece of rock that falls and lands on the Earth from space
15 CometsThese are chunks of ice and rock left over from the formation of our solar systemThey move around the Sun in a long oval-shaped orbits
16 How are meteors related to comets? Meteors are the dust and rock particles that fall from the tail of a comet
17 Scientist attempt to find out if there is other intelligent life in the universe Scientist use radio telescopes to try to detect signs of life sending coded messages called SETI into space
18 1. I’m the closest planet to the sun, what planet am I? A. MercuryB. SaturnC. VenusD. Earth
46 A. Rings that go up and down instead of around the middle 15. Uranus is known for?A. Rings that go up and down instead of around the middleB. Its asteroid beltC. the comet that circles its equatorD. Its 18 moons
47 A. Rings that go up and down instead of around the middle
48 A. Mercury B. Pluto C. Venus D. Mars 16. The surface of this planet is very hot (869o) and it is the second planet from the sun.A. MercuryB. PlutoC. VenusD. Mars
56 20. How are meteors related to comets? A. Meteors are in the dust of a comet’s tailB. Meteors are what falls from the tail of a comet.C. Comets come from falling meteors crashing to the earth.D. Comets are falling meteors
57 B. Meteors are what falls from the tail of a comet.
58 21. What is a Meteorite? A. A falling Comet B. A shooting star C. A meteor that hits the earthD. none of the above they are just in fairy tales
70 27. Explain how meteoroid, meteor, and meteorite are related. A. They are all the same thing, just at a different stage of its life.B. They are totally different rock of ice that all fly with cometsC. They all fall from the sky on different days
71 A. They are all the same thing, just at a different stage of its life.
72 28. Which planet has the largest volcano in the solar system? A. MarsB. MercuryC. SaturnD. Pluto