Weather
Space
Matter
Greece
Rome
100

The blanket of air surrounding Earth

Atmosphere

100

The star at the center of our solar system

The Sun

100

The smallest particle that still behaves like the original matter it came from

Atom
100

Rule by the people

Democracy

100

A public meeting place in Rome

Forum

200

Movements of air that result from local changes in temperature

Local Winds

200

The path one body takes in space as it revolves around another

Orbit

200

THe amount of space an object takes up

Volume

200

A widespread disease

Plague

200

Rule by three leaders

Triumvirate

300

A large body of air that has similar temperature and humidity throughout

Air mass

300

An imaginary line that passes through Earth's center and its North and South Poles

Axis

300

The dense area in the center of an atom that contains protons and neutrons

Nucleus

300

A term used to define outsiders of a culture

Barbarian

300

To officially and absolutely turn down an idea

Veto

400

The pattern of weather an area experiences over a long period of time

Climate

400

One of the shapes the moon seems to have as it orbits Earth

Moon phase

400

The ability of a substance to go through a chemical change

Reactivity
400

Rule by the few

Oligarchy

400

The ill-treatment towards someone, especially because of their religion, race, or political beliefs

Persecute

500

The layer of air closest to Earth's surface

Troposphere
500

The bending of light as it moves from one material to another

Refraction

500

The measure of how closely packed an object's atoms are

Density

500

The story or impact left behind by someone

Legacy
500

A wealthy member of Roman society

Patrician

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