Water and carbon systems

Question 1

Example of a positive feedback in a system

Answer 1

Global temp rise, Increased oceanic temp, Dissolved CO2 released by warmer oceans, More CO2 in atmosphere.

Question 2

Example of a negative feedback in a system

Answer 2

Increased use of fossil fuels, Increase atmospheric CO2, More plant growth, Reduces atmospheric CO2 and temp.

Question 3

What is an isolated system ?

Answer 3

These have no interactions with anything outside the system boundary - there is no input or output of energy or matter.

Question 4

What is a closed system ?

Answer 4

These have transfers of energy both into and beyond the system but not transfer or matter. No input but there is outputs.

Question 5

What is an open system ?

Answer 5

Receive inputs and outputs

Question 6

How is the Amazon an open system ?

Answer 6

Absorbs solar energy, which drives photosynthesis, evaporation, and climate interactions.
Water, carbon, nutrients, and organisms move in and out of the system.

Question 7

How is the river eden an open system ?

Answer 7

It receives inputs ; precipitation and solar energy
It has processes ; Infiltration, Run-off etc
It has outputs ; River discharge, Evaporation