-aqua-, -hydro-
-terra-, -geo-
-aer-, -aero-, -air-
-thermo-
-vis-,-vid-
100

Aquarium 

A container or artificial pond filled with aquatic life

100

Territory

A geographic area belonging to someone

100

Airbag

A bag in a car that inflates with air to protect passengers if the car crashes

100
Thermometer

A tool that measures the heat of something

100
Vision

A person's ability to see

200

Hydrate 

To consume water

200

Geology

The study of the Earth; Earth Science

200
Aircraft

Machines that operate in the air/sky/atmosphere

200

Thermos

A container that keeps the liquid inside of it warm

200

Video

A recording of an image or moving images

300

Hydraulics

Science that deals with the practical application of water in engineering 

300

Geography

The study of describing the features of the Earth's surface; like maps and such

300

Aerial

Of, relating to, or occurring in the atmosphere

300

Geothermal

Relating to or utilizing the heat that comes from the Earth.  

300

Invisible

Not visible

400

Aquifer 

A water-bearing structure 

400

Mediterranean 

"Middle Earth", The Mediterranean sea is surrounded by land; it is in the "middle" of the Earth 

400

Aerospace

The space that comprises the Earth's atmosphere and beyond

400

Hypothermia

When one gets so cold it becomes dangerous to their health. 

400

Supervise

to "look over" something, to oversee a project

500

Aquaculture 

Cultivating the life of the sea; fish farming

500

Extraterrestrial

An alien; a species not of the Earth

500

Aerobic

Living, active, or occurring only in the presence of oxygen 

500

Exothermic

Requires heat to be absorbed from outside of the body. Cold-blooded creatures are exothermic

500

Videographer

A person who takes videos

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