undergrowth

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.

یه حیوان پشمالو، بزرگ و قوی که پستاندار هم هست.

شتر حیوان بزرگی است که یک یا دو کوهان بر پشت خود دارد.

استتار یعنی جوری خودت رو شبیه محیط اطرافت کنی که دیده نشی. این کار به حیوونا کمک می‌کنه که از خطر دور بمونن و راحت‌تر قایم بشن.

به بالاترین قسمت جنگل میگن، جایی که شاخه‌ها و برگ درخت‌ها روی هم رو گرفتن.

دره عمیق یا کنیون، یه شکاف خیلی عمیق توی زمینه که دیواره‌های خیلی تندی داره. معمولاً یه رودخونه از وسطش رد می‌شه که طی سال‌ها اون رو تراشیده.