A layer of gas surrounding planet Earth that is held in place by gravity.
A feature on the surface of Earth such as a mountain, hill, dune, ocean, or river.
What is a Landform.
Water found in rivers, lakes, glaciers, and ice sheets and underground that contains low concentrations of salt.
What is Fresh Water.
Water found beneath the Earth's surface, stored in the spaces and cracks within soil, sand, and rock.
What is Groundwater.
The science and business of cultivating soil, growing crops, and raising livestock.
What is Agriculture.
The sum of all living matter on Earth.
What is the Biosphere.
Rock heated to a temperature that is sufficient to turn it into a thick liquid.
What is Molten Rock.
A large, slow-moving, long-lasting accumulation of snow and ice that develops on land.
What is a Glacier.
All the living things that belong to the same species and live in the same area.
What is Population.
All the interacting populations in a particular area.
What is a Community.
The portion of the system of Earth that includes Earth's interior, rocks and minerals, landforms, and the processes that shape Earth's surface.
What is the Geosphere.
A single, self-contained, living thing.
What is an Organism.
A large body of water that is still and surrounded by land.
What is a Lake.
All the plants found in a particular area.
What is the Vegetation.
The space, conditions, and all the living and nonliving things around an organism.
What is an Environment.
All the water on Earth's surface; includes all water sources above and below the surface.
What is the Hydrosphere.
Sand or small pieces of rock broken down by weathering and deposited on land or at the bottom of a body of water.
What is Sediment.
The entire body of saltwater that covers about 71% of Earth.
What is an Ocean.
Any ground that remains completely frozen for at least two years straight.
What is Permafrost.
The part of Earth's surface that is not covered by water, as opposed to the sea or the air.
What is the Land.
All living and nonliving things and all their interactions in an area.
What is an Ecosystem.
Actions by one thing that have an effect on a different or separate thing.
What are Interactions.
A small body of fresh water that flows into a river.
What is a Stream.
Areas where standing water covers the soil or where the ground is very wet.
What are Wetlands.
Something valuable that we can use.
What is a Resource.