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Study
Unit 4
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Scientists keep ________ on comets to know when they will appear.
data
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Okay!
True of False: Some stars may have planets like Earth.
True
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Everyone / No one / Anyone / Someone knows for sure if there is life on other planets or not.
No one
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Okay!
People live and work on the _________________. They perform experiments in space.
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Okay!
True of False: The Milky Way might be a galaxy.
False: It is a galaxy.
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Humans need oxygen in their __________ in order to breathe.
atmosphere
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Someday we may land a ______________ on the moon again.
spacecraft
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Everyone / No one / Anyone / Someone knows the answer, but everyone / no one / anyone / someone has an opninion!
No one and everyone
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Earth is a ___________ that moves around the sun.
planet
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If everyone / no one / anyone / someone tells you that they know, that person really doesn't know!
anyone or someone
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I will debate about life in space with everyone / no one / anyone / someone who wants to.
anyone
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Okay!
Do you think ______________ really have green skin?
extraterrestrials
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The Earth and other planets _______ the sun.
orbit
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The Earth takes a ____________ around the sun every year.
journey
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Many people ________ whether there is life on other planets.
debate
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_________ can go to outer space and live on a space station.
Astronauts
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There are many ____________ in the universe.
galaxies
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___________ in other solar systems are extremely far away.
Planets
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The sun and planets make up our ______________.
solar system
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Everyone / No one / Anyone / Someone likes to debate about life on other planets.
Eveveryone
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Are you everyone / no one / anyone / someone who likes to debate?
someone
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A ________ is a cloud of rock, ice, and gast that orbits the sun.
comet
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True of False: Earth may have an atmosphere.
False: It does have an atmosphere.
Oops!
Okay!
A powerful _________ is needed to send anything into space.
rocket
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Okay!
Our ___________ is called the Milky Way.
galaxy
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Okay!
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