estuary

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.

Atmospheric pressure is the weight of the air in the sky pressing down on the Earth. It changes depending on the weather and how high you are above the sea.

Um animal grande e forte com pelo espesso.

Um camelo é um animal grande com uma ou duas bossas nas costas.

Camuflagem é uma forma de esconder-se misturando-se com o ambiente. Ajuda os animais a ficarem seguros, tornando-se difíceis de ver.

É a camada superior de uma floresta, formada pelas copas das árvores.

Um cânion é um vale profundo com paredes muito íngremes, muitas vezes com um rio correndo pelo meio. É formado pela erosão da água.