Elements, Compounds and Abundant Earth Elements (Flashcard Grade)

Front

What is an element?

Back

A substance that cannot be decomposed into simpler substances by chemical means, made up of the same atoms.

Front

What is the most abundant element in Earth's atmosphere?

Back

Nitrogen.

Front

What is a molecule?

Back

A group of two or more atoms that are bonded together.

Front

What is the atmosphere?

Back

The layer of gases surrounding the Earth, including oxygen, nitrogen, and water vapor.

Front

What element is found in all components of Earth?

Back

Oxygen.

Front

What is the geosphere?

Back

The solid part of the Earth, including rocks and soil.

Front

What is the hydrosphere?

Back

The water component of the Earth, including oceans, rivers, and lakes.

Front

What is the biosphere?

Back

The global sum of all ecosystems, where life exists on Earth.

Front

What are essential elements of life?

Back

Elements that are necessary for living organisms, such as carbon, hydrogen, oxygen, nitrogen, phosphorus, and sulfur.

Front

What is an atom?

Back

The basic unit of a chemical element, consisting of protons, neutrons, and electrons.