Impact Unit 6: New Frontiers

The planet Saturn is believed to have the most ____, or moons, in the solar system.

• satellites

• aspects

• craters

• rovers

The moon is covered in ____, from where objects have crashed into it.

• rovers

• plains

• craters

• polar caps

Both Earth's and Mars's ____ are tilted about 23.5 degrees.

• aspects

• axis

• polar caps

• focus

Scientists hope that studying mars will _____ discovering life on the planet.

• aspire

• lead to

• speculate

• equip

I _____ to be an important scientist and win the Nobel Prize someday.

• detect

• focus

• efficiently

• aspire

There are now only 8 planets in our _____.

• valley

• solar system

• diameter

• landscape

Earth and Mars have several similar types of ____ such as mountains, plains, and volcanoes.

• landscapes

• atmospheres

• frontiers

• instruments

The age of the universe is very _____.

• vast

• proof

• ancient

• substance

to concentrate

• detect

• focus

• equip

• speculate

to find or discover something, notice

• detect

• focus

• equip

• speculate