Formation Of The Earth

Question 1

What is the most widely accepted theory of the formation of the Earth?

Answer 1

Nebular hypothesis-4.6 billion years ago a great cloud condensed under its own gravity, most oft the material gathered up and started to heat up due to compression. This formed the star and the remaining material orbitted the star and began to clump together to form larger bodies called planetsimals. They collided together creating planets and moons and the Earth.

Question 2

What caused the earth to bulge at the equator and how do we knkw that it is bulged?

Answer 2

The fast spinning younger earth forced the planet to bulge at the equator-like how something is forced out a container when its spinned. We know that it is bulged because the earth js wider at the rquator than from pole to pole.

Question 3

What is the surface area of the Earth?

Answer 3

510 million square km.

Question 4

How much of the Earth us above sea level?

Answer 4

149 square km of 510 million is above sea level which is about 29%.

Question 5

What is the crust made out of?

Answer 5

Thin ridged layer of lighter rocks that includes earth’s surface

Question 6

What is the mantle?

Answer 6

Solid with liquid properties(due to high pressures) mostly compounds rich in iron, silicon and magnesium

Question 7

What is the outer core made out of?

Answer 7

Liquid iron and nickel

Question 8

What is the inner core made out of?

Answer 8

Solid iron and nickel

Question 9

What is the lithosphere?

Answer 9

The curst and the uppermost portion kf the mantle

Question 10

What is the asthenosphere?

Answer 10

Thin slush like layer if the mantle

Question 11

What is the hypothesis that many support about the earths magnetic field?

Answer 11

It is cause by movement of fluid in the outer core. A magnetic field is created when an electric current is created by the moving fluid.