Systems and feedback vocabulary test

Question 1

What is a closed system?

Answer 1

a system where there is no transfer of energy or matter across the system boundary, e.g. the earth

Question 2

What is an open system?

Answer 2

Where there are transfers of energy and matter, eg. the heating of the planet

Question 3

what is dynamic equilibrium?

Answer 3

your inputs and outputs means that the system stays in balance

Question 4

what is feedback?

Answer 4

changes in the system that can lead to a further change

Question 5

what is positive feedback?

Answer 5

amplifying change in a system almost like a snow borne effect

Question 6

what is an example of a positive feedback?

Answer 6

the greenhouse effect. the radiation heats our earth, co2 traps the heat, leading to global warming as the planet continues to warm even more heat will be trapped, leading to increasing temperatures

Question 7

what is negative feedback?

Answer 7

when the system changes and this dampens the initial changing, positive effect

Question 8

what is an example of negative feedback?

Answer 8

globe warming and temps rise, more carbon trapped in atmosphere, leading to carbon fertilisation which can increase forest cover, carbon levels to decrease