8.6.2 - TLTC

A (n) ___________is a scientist who studies the stars and planets.

• captain

• alien

• astronaut

• astronomer

In a weightless environment, everything floats___________.

• uncontrollably

• downwards

• smoothly

• constantly

Unidentified Flying Objects or "___________" haven't been formally recognized.

• UFOs

• spaceships

• space shuttles

• spacecraft

___________ is the name of a planet that matches the Roman God of the sea.

• Mars

• Sun

• Venus

• Neptune

Some people believe the___________ was created by a big explosion.

• galaxy

• atmosphere

• universe

• outer space

Astronauts___________ around in space because there is no gravity in space.

• fly

• float

• walk

• trace

Mars is the most___________ planet in our Solar System besides Earth.

• powerful

• notable

• appropriate

• habitable

The prerequisite condition for a/an .................. planet is water supplies, appropriate temperatures, and breathable air.

• habit

• inhabitable

• inhabitant

• habitant

The scientists believe that there might be some planets to .................. human life.

• provide

• accommodate

• replace

• support

___________ is named after the Roman God of war.

• Uranus

• Jupiter

• Mars

• Venus