Astronomy
Ecosystems
Energy of Chem
Atmosphere and Weather
Chemistry
100

A regular, repeating path that one object in space takes around another one.

Orbit

100

A large naturally occurring community of flora and fauna occupying a major habitat.

Biome

100

The energy contained within a system that is responsible for its temperature.

Thermal Energy

100

The weather conditions prevailing in an area in general or over a long period.

Climates

100

How much space an object or substance takes up in relation to the amount of matter in that object or substance.

Density

200

Continually changing views of the sunlit part of the Moon.

Phases of the Moon

200
A biological living system that functions as an individual life form.

Organisms

200

Energy that is stored in an object due to its position or condition.

Potential energy

200

The third layer of the atmosphere, directly above the stratosphere and directly below the thermosphere.

Mesosphere

200

A measure of the amount of matter in an object.

Mass

300

four divisions of the year marked by particular weather patterns and daylight hours.

Seasons

300

A term typically used to refer to the number of people in a single area, all the inhabitants of a particular town, area, or country.


 

Population

300

An object is the form of energy that it possesses due to its motion. energy which a body possesses by virtue of being in motion.

Kinetic Energy

300

 A thin, atmosphere-like volume surrounding a planet or natural satellite where molecules are gravitationally bound to that body.

Exosphere

300

The amount of space that a substance or object occupies, or that is enclosed within a container.

Volume

400

A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.

Galaxy

400

non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems.

Abiotic Biotic

400

A substance or matter in a state in which it will expand freely to fill the whole of a container, having no fixed shape.

Gas

400

The very highest levels of a profession or other sphere, or of prices or other quantities. Earth's upper layer of the atmosphere.

Stratosphere

400

Anything that takes up space and can be weighed, any substance that has mass and takes up space by having volume.

Matter

500

An object's spinning motion about its own axis.

Rotations

500
The regions of the surface, atmosphere, and hydrosphere of the earth occupied by living organisms.

Biosphere

500

 A chemical reaction that releases energy by light or heat. It is the opposite of an endothermic reaction.

Exothermic Reaction

500

The force exerted on a surface by the air above it as gravity pulls it to Earth.

Air Pressure

500

One of the distinct forms that different phases of matter take on, having three states of matter being solid, liquid, and gas.

State of Matter