A Family of Planets Cody 6th gr.
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Astromical Unit. | The average distance between the Earth and the sun,or approximately 93 million miles.
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| Retrograde Rotation. | The clockwise spin of a planet or moon as seen from above the planet's or moon's north pole.
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| Gas Giants. | The large,gaseous planets of the outer solar system.
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| Prograde Rotation. | The counterclockwise spin of a planet or moon as seen from above the planet's north pole.
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| Terrestrial Planets. | The small,dense, rocky planets of the inner solar system
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| Name the gas giants | Jupiter, Saturn, Uranus & Neptune
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| Name the Rocky or Terrestrial Planets. | Mercury, Venus, Earth and Mars.
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| What does Mercury's surface look like? | Our moon.
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| What is another name for the Rocky Planets? | Terrestrial Planets or Inner Planets.
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| What does Terrestrial mean? | Earth
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| Why does Mercury's surface look like our moon? | It was bombarded by meteroites long ago.
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| What does Mercury lack? | It lacks an atmosphere.
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| Why does Mercury lack an atmosphere? | It's gravity is too weak to hold one.
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| What kind of atmosphere does Venus have? | It has a thick atmosphere.
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| Why does Venus' atmosphere do? | It traps heat.
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| Why does Venus' atmosphere trap heat? | Because of the Greenhouse effect.
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| On Venus and Uranus, the sun rises in which direction? | The sun rises in the west because they rotate opposite from the Earth.
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| Which two planets is Earth between? | Venus and Mars
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| The Earth's crust is cracked into what? | Plates that move.
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| What is the tallest Volcano in the Solar System? | Olympus Mons
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| How would you compare Olympus Mons to Mount Everest? | It is three times taller.
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| Which planet is the only one on which an unmanned spacecraft has successfully landed and explored? | Mars.
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| Which planet takes the longest to revolve around the sun? | Pluto
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| Which planet takes the shortest amount of time to revolve around the sun? | Mercury
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| Which planet is the hottest planet? | Venus (464 degrees Celsius)
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| How does the greenhouse effect work? | It is when heat is trapped in the planet's atmosphere.
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| Do Venus and Earth rotate on their axes the same way? | NO. Earth spins counterclockwise and Venus spins clockwise.
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| Venus' clouds are made up of what substance? | Sulfuric Acid
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| What color is Mars? | Red
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| What was the name of the first artificial satellite launched by the Soviet Union in 1957? | Sputnik 1
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| What is the two ways of measuring distance in space? | Astronomical Units and Light minutes/light hours/light years.
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| How fast does light travel? | 186,000 miles in one second.
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| How many times around the earth can light travel in one second? | almost 8 times around the earth.
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| What is a light minute? | How far light travels in a minute. (11 million miles per minute)
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| How long does it take light from the sun to reach the earth? | 8.3 minutes.
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| Distances within the solar system are measured how? | Light minutes and light hours.
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| Distances between stars are measured how? | Light years.
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| How are the innner planets different from the outer planets? | They are spaced close together and they are all small, dense and rocky.
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| Why is a day on Mercury longer than an earth day? | Mercury spins slower than Earth. It takes 59 days on Earth for Mercury to spin once.
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| How long is a Mercury year. | 88 Earth Days.
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| How is Venus different from Earth. | Retrograde Rotation. Venus rotates clockwise and Earth rotates counterclockwise.
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| Venus' atmosphere is made up of mostly what substance? | Carbon Dioxide.
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| What is key on Earth for the development of life? | Liquid Water
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| What is the name of NASA's program to study Earth from space? | Earth Science Enterprise
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| Which planet is the most studied the solar system, besides Earth? | Mars
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| Why is Mars a very cold planet? | It has a thin atmosphere and it is far from the sun.
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| What would happen to water because of the low atmospheric pressure on Mars? | It would quickly boil away.
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| The only water on Mars is in what form? | Ice
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| Why do scientists believe that Mars once had liquid water? | There appears to be dry river beds.
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| Mars has how many volcano systems | 2
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| Where is the largest mountain in the solar system (Mons Olympus)? | Mars
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