Best Answer

Earth's solid mass is about 32% iron, 30% oxygen, 15% silicon, 14% magnesium, 3% sulfur, 2% nickel, 1.5% calcium, and 1.4% aluminum. Much of the iron and nickel are in the planetary core, which is 89% iron and 6% nickel. The atmosphere consists of 78% nitrogen and 21% oxygen, with traces of other gases including carbon dioxide (0.3%).

Earth's gravity is insufficient to hold onto high-atmosphere hydrogen and helium, so it has no thick, dense hydrogen atmosphere like the 4 larger planets. Since the planet's formation, comets have deposited water on Earth to provide hydrogen. Helium has been replaced through the decay of radioactive elements in the crust, and is normally found in underground methane deposits.

(see the related link)

User Avatar

Wiki User

โˆ™ 2011-01-10 23:08:57
This answer is:
User Avatar
Study guides


20 cards

Who is known as the first African American scientist

What is Luis Alvarez's cultural background

What was Benjamin Banneker's ethnic background

Which scientist used mathematical knowledge to calculate the exact measurement of the meter

See all cards
285 Reviews

Add your answer:

Earn +20 pts
Q: What is the composition of the Earth?
Write your answer...
Still have questions?
magnify glass
Related questions

What is the composition of each of the Earth's layer?

What is the composition of each layer of earth?

What is the composition of each layer of the earth?

What is the composition of each layer of earth?

What is the composition of each layer of earth?

What is the composition of each layer of earth?

What is mercury's composition compared with earth?

The composition of mercury is solid as well as earth.

Was the Earth was originally of homogeneous composition?

Yes the earth was originally of homogeneous composition.

Why is the chemical composition of Earth's atmosphere important?

The Chemical Composition of the Earth's atmosphere is important because it holds the Earth together.

What is the main composition of the Earth?

The main composition of the Earth is iron, oxygen, and silicon. There is also magnesium and sulfur in the crust of the Earth.

Whats the composition the crust?

The composition of the crust is the outermost layer of the earth. The outermost layer of the earth is rocky.

What are the parts of the earth based on composition?

The three layers of the earth, based on the composition is the crust, the mantle, and the core.

How does the composition of earth atmosphere differ from the composition of the atmosphere of the gas giants?

earth has people in it's atmosphere

How is the composition of the moon different from Earth's composition?

the moon has a different iron level than the earth because the moon was not formed from the earth .

What is the study of the composition of Earth?

Geology is the study of the Earth.

People also asked