Type of planet with a solid, rocky surface and crust

Larger but less dense type of planet that has orbiting moons and thin, encircling rings

A small, irregularly shaped object mainly found between the orbits of Mars and Jupiter

A body of icy dust particles and frozen gases that looks like a bright ball with a long, feathery tail

A piece of space debris composed of chunks of rock and iron

A piece of space debris that burns up before it reaches the Earth's surface

A piece of space debris that enters Earth's atmosphere and collides with Earth

The part of Earth's surface that is covered in water

The part of Earth's surface that is covered by land

The part of the Earth that supports life

The layer of gases that extends above Earth's surface

The natural features of the Earth's surface

Earth's most visible landforms that are seven large landmasses

A shallow area off the coast of a continent that leads to a steep drop

The theory that the continents were once joined and then slowly drifted apart

A theory that the Earth's crust is a series of slowly moving plates which create many of the planet's physical features

The highest point on Earth

The lowest point on Earth

The deepest point on Earth

A zone of earthquake and volcanic activity around the perimeter of the Pacific Ocean

A ring-shaped island formed by coral buildup on the rim of an underwater volcano

An underwater earthquake or tidal wave

A lowland saturated by water

A tall, isolated rocky hill or mountain with a flat top and steep sides

A group of islands

A narrow stretch of land that is surrounded by water on three sides

A lowland between mountains

A body of water surrounded by land

Underwater mountains

A narrow strip of land (like a bridge) that connects two larger strips of land

A narrow waterway joining two larger bodies of water

The very center of the Earth believed to be made of mostly melted iron and nickel that is 4000 miles below the surface

A thick middle layer of dense hot rock, consisting of silicon, oxygen, aluminum, iron, and magnesium

The top layer of the Earth made up of sheets of rock that float on the partially melted mantle that is about 3 to 30 miles thick

Locations where Earth's tectonic plates smash together or collide

Locations where Earth's tectonic plates are moving away from each other

Locations where Earth's tectonic plates slide past each other and rub along the edges

A process where a sea plate collides with a continental plate

Bends in layers of rock

Cracks in the Earth's crust

Sudden, violent movements of tectonic plates along a fault line

Mountains formed by lava or magma that break through the Earth's crust

The process in which rocks break down

The process in which the Earth's surface degrades due to wind, glaciers, or moving water

Large bodies of ice that form over time as layers of snow press together and turn to ice and move across the Earth's surface

Large piles of glacial rocks and debris

An underground porous rock layer

The process of removing salt from water

The process in which liquid water changes into vapor (gas)

The process of excess water vapor changing into liquid water when warm air cools

Moisture that falls to the Earth as rain, sleet, hail, or snow

A natural resource that can replenish itself

A natural resource that cannot be readily replaced by natural means to keep up with human use

Elements formed from the remains of plants and animals that lived millions of years ago

Substances from the Earth that are not living or made of living things

The percentage of Earth's water that is saltwater

The percentage of Earth's water that is freshwater

The largest planet in the solar system

The planet closest to the sun