Review Unit 4 - 171120

A ________ is cloud of rock, ice and gas that orbits the sun.

• comet

• galaxy

• planet

• atmosphere

The sun and planets make up our ________ _____________

• solar system

• extra terrestrials

I saw a documentary about the _______________ for life in other galaxies.

• Search

• Anyone

A planet may need an __________ to support life.

• atmosphere

• astronaut

• orbit

• comet

Mars is the third __________ from the sun.

• comet

• orbit

• data

• planet

We sent rocket into ________

• space

• atmosphere

She knew that planets _____________ orbit that star.

• may

• might

A planet _______ orbit that star. There's not much data, though.

• may

• might

We ________ travel to another solar system.

• may

• might

I ____________ it may be a comet.

• think

• thought