all the living things on a planet

a long, narrow groove that forms where water, lava, or other liquid flows.

a proposed answer to a question about the natural world

to notice how two or more things are alike or different

Information about the natural world that is used to support or go against (refute) a claim.

an event or series of events that causes changes in the geosphere, such as flowing water or flowing lava

the solid part of a rocky planet

having the conditions necessary to support life.

all the liquid water and solid water (ice) on a planet

a feature that forms on the surface of a planet, such as a mountain, channel, or sand dune.

an object, diagram, or computer program that helps us understand something by making it simpler or easier to see.

a scientist who studies the geospheres of planets in our solar system and the universe.

the process of making clear how your evidence supports your claim.

any planet with a solid surface, such as Earth or Mars.

a claim supported by evidence.

a set of interacting parts forming a complex whole.