Astronomy
A regular, repeating path that one object in space takes around another one.
Orbit
A large naturally occurring community of flora and fauna occupying a major habitat.
Biome
The energy contained within a system that is responsible for its temperature.
Thermal Energy
The weather conditions prevailing in an area in general or over a long period.
Climates
How much space an object or substance takes up in relation to the amount of matter in that object or substance.
Density
Continually changing views of the sunlit part of the Moon.
Phases of the Moon
Organisms
Energy that is stored in an object due to its position or condition.
Potential energy
The third layer of the atmosphere, directly above the stratosphere and directly below the thermosphere.
Mesosphere
A measure of the amount of matter in an object.
Mass
four divisions of the year marked by particular weather patterns and daylight hours.
Seasons
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
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
A thin, atmosphere-like volume surrounding a planet or natural satellite where molecules are gravitationally bound to that body.
Exosphere
The amount of space that a substance or object occupies, or that is enclosed within a container.
Volume
A system of millions or billions of stars, together with gas and dust, held together by gravitational attraction.
Galaxy
non-living chemical and physical parts of the environment that affect living organisms and the functioning of ecosystems.
Abiotic Biotic
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
The very highest levels of a profession or other sphere, or of prices or other quantities. Earth's upper layer of the atmosphere.
Stratosphere
Anything that takes up space and can be weighed, any substance that has mass and takes up space by having volume.
Matter
An object's spinning motion about its own axis.
Rotations
Biosphere
A chemical reaction that releases energy by light or heat. It is the opposite of an endothermic reaction.
Exothermic Reaction
The force exerted on a surface by the air above it as gravity pulls it to Earth.
Air Pressure
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