ERTH 1050 - System Earth

Where does remnant heat come from?

Leftover from the formation of Earth

What us fluxing?

Interactions between spheres

What is subduction? How does it affect the crust?

T/F More than 99% of energy comes from the Sun

True, almost all energy comes from the Sun

Why are fossil fuels not terrestrial energy?

They come from aged plant matter - plants live using photosynthesis

What makes wind energy solar?

The Sun creates pressure differences that cause wind

What are the only terrestrial forms of energy?

Nuclear, radioactive decay, frictional heat, and geothermal flow

Main properties of the atmosphere

Low pressure and density

What is the atmosphere made of?

Nitrogen and oxygen

How is crust created?

Volcanic arcs and mid ocean ridges

How much of the Earth’s mass resides in the crust and hydrosphere together?

<1%

What is the largest layer of Earth?

The Mantle

Properties of the plastic (upper) mantle

Malleable and slow moving, regulates the carbon cycle

What is the mantle made of?

Silicates

What creates the magnetosphere?

The Coriolis forces that move the liquid core

What does the magnetosphere do?

Protect us from UV and solar junk and creates solar wind

What causes solar wind?

The repulsion of ions from the Sun

As you gets closer to the core, density ___ and temperature ____

increases, increases