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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.

Un gros animal fort avec une épaisse fourrure.

Un chameau est un grand animal avec une ou deux bosses sur le dos.

Le camouflage est une technique pour se fondre dans le décor. En ressemblant à ce qui nous entoure, on devient beaucoup plus difficile à repérer.

C'est la couche supérieure d'une forêt, formée par les cimes des arbres.

Un canyon est une vallée profonde aux parois très escarpées, souvent creusée par une rivière au fil du temps.