atmospheric pressure

Algae are simple plants that grow in or near water and do not have ordinary leaves or roots. They can be very small like green spots or very large like seaweed found in the ocean.

An amphibian is a type of animal that can live both on land and in water. Most amphibians, like frogs and salamanders, start their lives in the water and move to land as they grow older.

An asteroid is a large rock that travels through space and orbits the sun. It is much smaller than a planet and is mostly made of rock and metal.

Astronomy is the scientific study of stars, planets, and everything else in space. It is the branch of science that looks at how the universe works outside of Earth's atmosphere.

A large, heavy, furry mammal.

A large animal with a hump, living in deserts.

Camouflage is a way to hide by looking like the things around you. It helps animals and people stay safe by blending into the background so they are hard to see.

A canopy is a cover that hangs over something, like a bed or a seat, to provide shade or protection. In nature, it is the top layer of a forest where the branches and leaves of tall trees meet to form a roof.

A canyon is a deep valley with very steep sides, often with a river flowing through it. It is a large natural hole in the earth's surface created by water erosion over many years.

A carbon footprint is the total amount of carbon dioxide gas that is made by a person, group, or activity. It measures how much your actions, like driving or using electricity, affect the environment.