Coasts as natural systems

What is meant by 'input' in a system?

• Energy and/or matter leaving a system.

• Energy and/or matter entering a system.

• The edge of a particular system.

• Movement between stores/components in a system.

What does 'output' refer to in a system?

• Energy and/or matter entering a system.

• Energy and/or matter leaving a system.

• A section of a system where matter can remain.

• The edge of a particular system.

What is the 'boundary' in a system?

• Energy and/or matter entering a system.

• The edge of a particular system.

• Movement between stores/components in a system.

• A section of a system where matter can remain.

Which of the following best describes an open system?

• Energy and matter are constant.

• Only energy is transferred.

• Energy and matter can be transferred in, through, and out.

• Only matter is transferred.

What happens to stores in a system at equilibrium?

• They increase.

• They decrease.

• They stay the same.

• They disappear.

What is dynamic equilibrium?

• A state where components remain unchanged

• A state where components change to reach balance

• A state of constant imbalance

• A state where no feedback occurs

What is negative feedback?

• Enhancing the original change

• Ignoring the original change

• Lessening and reversing the original change

• Amplifying the system's response

What is the first step in the example of negative feedback provided?

• Increased evaporation from the oceans

• Surface temperature decreases slightly

• More low clouds in the atmosphere

• Surface temperature increases slightly

What effect do more low clouds in the atmosphere have in the feedback loop?

• Increase surface temperature

• Decrease evaporation

• Increase the earth’s albedo

• Decrease the earth’s albedo

What is albedo?

• The absorption of UV rays by the Earth's surface

• The reflection of the sun's UV rays back into the atmosphere

• The emission of infrared radiation from the Earth

• The scattering of sunlight by clouds