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Flashcards in Feedback Mechanisms Deck (37)
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1

What are feedback mechanisms?

interactions between systems and different environments on the Earth

2

Feedback mechanisms are System-environment interaction cycles that affect ____ systems.

open

3

Why do feedback mechanisms particularly affect open systems?

Because there needs to be some sort of matter that is exchanged in these feedback mechanisms

4

Feedback mechanisms are a way of explaining _____ in a system.

change

5

What are the two types of feedback systems?

Positive feedback system, Negative feedback system

6

Positive feedback mechanism _____ change in a system

enhances

a "vicious cycle," once it starts changing it causes more and more change

7

An example of a positive feedback mechanism related to global warming is...

forest fire cycle

as the atmosphere gets warmer it causes more forest fires, more forest fires decreases the amount of trees, lower amount of trees causes more carbon dioxide to build up in the atmosphere, which causes the atmosphere to get warmer, which causes more forest fires, which releases more carbon dioxide, which....

8

A negative feedback mechanism _____ change in a system.

reduces

Slows the pace of change.
works as a balancing effect, to maintain a status quo or stationary (non-change), back-to-normal, condition

9

An example of a negative feedback mechanism related to global warming is...

atmospheric warming

as the atmosphere gets warmer it causes more ocean water to evaporate into the atmosphere, and all of that evaporated water causes clouds, which blocks sunlight, which cools the atmosphere back down.

10

Earth is ____ because we haven't found any other planet that has supported life, even simple life, let alone the complex life we have here.

unique

11

Earth is the only planet that has found to have ______ in the atmosphere.

oxygen

12

What are the unique properties of Earth?

Presence of Oxygen in the atmosphere, Presence of Water, the Biosphere, and Soil

13

The Hydrosphere contains _____ in three forms: solid, liquid, and gas

water

we are the just the right distance from the sun to have a temperature range that allows water to exist in these three forms., or as all three of these phases

14

Earth's rich biosphere _____ with all other systems on the planet.

interacts

15

Why is soil integral to the rich Biosphere on Earth?

Without a layer of soil, we wouldn't have plants growing, and we wouldn't have a biosphere without this. Most other planets are lifeless, rocky wastelands.

16

The Major layers of the Earth are...

The Crust, The Mantle, the Outer Core, the Inner Core

17

The Mantle is composed of...

very hot rock that is not a liquid but is not brittle rock. Squishy, plasticy rock

18

The Outer Core is a _____.

solid

19

Does the Outer Core rotate?

Yes it does

20

What does the Outer Core's rotation cause?

Our strong magnetic field

21

What is the Inner Core made up of?

Iron.

22

Is the Outer Core a solid, liquid, or gas?

Solid.

23

The Earth has a ____ that are broken into large _____ that move across the surface.

crust, plates

24

About _____ million years ago all of continents were joined into one super-continent called ____

200, Pangea

25

Since _____ the continents have been moving apart to their current location.

Pangea

26

Are the continents still moving?

Yes

27

Earth has a _____ to its axis.

tilt

28

How many degrees is the Earth's axis tilted?

23.4

29

What does Earth's tilt cause?

The seasons. At certain times of the year the Southern Hemisphere is more directed towards the sun.

30

With an exponential population growth, we need to carefully address the resources that are ____ because the Earth is a _____ system.

limited, closed