A person who studies Earth and its people.
The locatioin of a place in relation to another place.
An area with at least one feature that makes if different from other areas.
A spacecraft, without a crew, that orbits Earth.
The point where two lines meet, or cross, on a map.
A set of lines the same distance apart that cross one another to form boxes.
A system in which plants, animals, and the environment depend on one another.
The wearing away of Earth's surface.
A happening, such as an earthquake or flood, that causes great harm or damage.
Anything that makes a natural resource, such as air, soil, or water, dirty and unsafe to use.
The act of saving resources and making them last longer.
An event in nature, such as an earthquake, tornado, volcanic eruption, or flood, that can cause great harm.