A feeling of weightlessness in orbit is called _____.
microgravity
thrust
antigravity
vacuum
4.
What is a “space spinoff”?
an item developed for use on Earth that also has uses in space
a piece of loose space junk from a satellite that “spins off” into orbit
an item developed for use in space that also has uses on Earth
an item used only while spinning in orbit around the Earth in space
microgravity
2.
An object in space can become very hot when it _____.
is in the shadows
is in direct sunlight
is too well insulated
uses solar panels
is in direct sunlight
3.
The body in our solar system that is most similar to Earth is _____.
Mars
Ganymede
Europa
Venus
An astronaut’s mass in space is _____.
higher than on Earth
equal to zero
the same as on Earth
lower than on Earth
the same as on Earth
Why must spacecraft be completely sealed?
to keep water from leaking out
because there is no air in space
to protect against microgravity
because of the extreme temperatures
because there is no air in space
Extraterrestrial life _____.
has only been found on Mars
is life that is found exclusively in the oceans
has been found on both Mars and Europa
is life that exists only off the planet Earth