Trees and other plants releaseoxygen.
Stars make oxygen in their cores by fusing lighter elements together.
Oxygen makes up approximately 21% of the Earth's atmosphere.
Oxygen makes up about 21% of Earth's atmosphere.
The two most abundant elements in the troposphere are nitrogen and oxygen. Nitrogen makes up about 78% of the atmosphere, while oxygen makes up about 21%.
Oxygen makes up 20.95% of the air surrounding Earth (that is almost 25%).
Nitrogen makes up about 78% of Earth's atmosphere, while oxygen makes up about 21%. Therefore, nitrogen and oxygen together make up approximately 99% of the air we breathe.
Oxygen Atoms
The bond is covalent.
the y in oxygen is the letter that makes the ee sound
In the word "oxygen," the letter "y" makes the "ee" sound.
oxygen is the answer
Oxygen.
Oxygen makes up 21 percent of the air by volume.
makes energy and oxygen!
oxygen
Oxygen
sulfur and oxygen
Photosynthesis makes oxygen and glucose