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Review

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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Question
Answer
Which is the characteristic of a comet?   It is made of rock and ice with a tail of gas and dust  
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Which planet's orbit is between Earth and the Sun?   Venus  
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Which two factors determine the gravitational attraction between two objects?   mass and distance apart  
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The Sun appears larger than other starts because of its   distance from Earth  
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If Halley's comet was seen without the use of a telescope in 1910 and 1986, when do scientist predict we may be able to see it again in the future?   2062  
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Spacecraft launched from Earth needs to reach a specific speed to escape Earth's surface to overcome what?   Earth's gravitational force  
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Natural satellites such as our moon orbit what?   planets  
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Why must scientists exercise while staying in space for long periods of time?   to keep muscle and bones from deteriorating  
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For long term space travel, scientists do NOT need to consider what?   escaping Earth's gravity  
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When the Soviets launched the first artificial satellite in space, this impacted society because now we have what?   satellites for phones, GPS, and weather  
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Why are objects from space usually harmless when they hit Earth?   they burn up in the atmosphere  
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Mars' orbit is shorter or longer than Earth's orbit around the sun?   longer  
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Mercury's orbit is shorter or longer than Earth's orbit around the sun?   shorter  
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If you have hypothesized that Europa, Jupiter's moon, contains liquid water, and carbon-based life, what would you use to prove your hypothesis?   a probe with instruments  
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An alien species needs a planet with a hard surface where they can see the stars. This means the planet cannot have what?   an atmosphere  
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Solid object that is smaller than a planet that orbits the sun between Mars and Jupiter is called an   asteroid  
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Objects made of iron and nickel that hit Earth after burning up in the atmosphere are called   meteorites  
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Humans cannot breathe Martian air because the % of what gas is too low?   oxygen  
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One of Jupiter's moons that is believed to have active volcanoes   Io  
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Gas giant planets include Jupiter, Saturn, Uranus, and   Neptune  
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Venus is very hot because it has a very thick   atmosphere  
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Which characteristic of a planet or moon protects it from solar winds?   magnetic field  
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If scientists wanted to send a probe to Pluto to see if there is carbon, what instrument would they need to include?   mass spectrometer  
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If scientists wanted to send a probe to Mar's to measure the pressure of Mars' atmosphere, what instrument would they need to include?   barometer  
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If you sent a probe to Titan to find out if it has earthquakes, what instrument would you need to include?   seismograph  
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Mass Spectrometers will only work on what type of probe?   lander  
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Atoms stop moving at   absolute zero (-273 degrees Celcius)  
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What is considered a "signature" for an element?   spectrogram  
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