terr/geo=earth
aer=air
astr/aster/stell=star
hydro/hydra/aqua=water
mar=sea/Luna=moon
100

Say the word that means a thing from outside the earth?

Extraterrestrial 

100

Say the word that means introducing air to any material?

Aerate

100

Say the word that means a symbol to mark printed or written text?

Asterisk

100

Say the word that means a hull fitted underneath?

Hydrofoil  

100

Say the word that means related to sea?

Marine

200

Say out the word that means hiding something from    someone?

Subterranean 

200

Say the word that means no oxygen?

Anaerobic

200

Say the word that means related to astronomy 

Astronomical 

200

Say the word that means liquids in motions?

Hydraulic 

200

Say the word that means relating to sailing and seaman?

Mariner

300

Say the word that means a plant growing in a container?

Terrarium

300

Say the word that means the atmosphere and the space beyond?

Aerospace

300

Say the word that means superb or related to the stars?

Stellar

300

Say the word that means life in water?

Aquatic

300

Say the word that means activity near the sea?

Maritime 

400

Say the word that means a rock filled with crystals?

Geode

400

Say the word that means a person or a thing in the stars?

Constellation 

400

Say the word that means water taking to someplace else?

Aqueduct

400

Say the word that means related to the moon?

Lunar

500

Say the word that means the middle of the earth and the moon?

Sublunary

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