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The Earth and other planets _______ the sun.
orbit
Earth is a ___________ that moves around the sun.
planet
A ________ is a cloud of rock, ice, and gast that orbits the sun.
comet
The sun and planets make up our ______________.
solar system
Humans need oxygen in their __________ in order to breathe.
atmosphere
The Earth takes a ____________ around the sun every year.
journey
There are many ____________ in the universe.
galaxies
Do you think ______________ really have green skin?
extraterrestrials
True of False: Some stars may have planets like Earth.
True
True of False: The Milky Way might be a galaxy.
False: It is a galaxy.
True of False: Earth may have an atmosphere.
False: It does have an atmosphere.
A powerful _________ is needed to send anything into space.
rocket
People live and work on the _________________. They perform experiments in space.
Someday we may land a ______________ on the moon again.
spacecraft
Everyone / No one / Anyone / Someone likes to debate about life on other planets.
Eveveryone
Everyone / No one / Anyone / Someone knows for sure if there is life on other planets or not.
No one
