Question

1. what is a state variable (also called a compartment) in a system? (slide 3)

a) a process that moves energy b) a type of ecosystem
c) a place where resources are stored d) a feedback loop

1. which of the following is an example of an open system? (slide 6)

a) a sealed jar with no holes b) the gulf of mexico
c) a rock sitting on the ground d) a closed aquarium

1. throughput in a system refers to: (slide 5)

a) the amount of energy and matter stored in the system
b) the energy that is lost from the system
c) the amount of energy and matter moving in, through, and out of the syste
d) the number of animals in the system
9.what happens in a negative feedback loop? (slide 7)
a) the process or component increases endlessly
b) energy stops flowing
c) the system stays exactly the same
d) the process or component is diminished or reduced

1. mangrove forests are an example of: (slide 9)

a) emergent properties b)closed systems
c) negative feedback d) state variables

Explanation:

• Question 6: A state variable (compartment) in a system is a place where resources are stored. For example, in an ecosystem model, a forest could be a compartment (state variable) that stores carbon.
• Question 7: An open - system exchanges matter and energy with its surroundings. The Gulf of Mexico exchanges water (matter) with the ocean and has energy exchanges (e.g., sunlight for photosynthesis). A sealed jar, a rock, and a closed aquarium are more closed or isolated in terms of matter exchange.
• Question 8: Throughput refers to the flow of energy and matter in, through, and out of a system. It is not about storage (a), lost energy (b) which is related to entropy in some cases, or the number of animals (d).
• Question 9: In a negative feedback loop, the process or component is diminished or reduced. For example, in body temperature regulation, if the body gets too hot (a stimulus), sweating (a response) cools the body (diminishes the heat stimulus).
• Question 10: Mangrove forests have emergent properties. Emergent properties are characteristics of a system that arise from the interactions of its components. Mangrove forests provide habitat, protect coastlines (properties that come from the interaction of trees, soil, water, etc. in the system), while they are not closed systems (they exchange with the ocean and atmosphere), not just a negative feedback mechanism, and not just a state variable.

Answer:

1. c) A place where resources are stored
2. b) The Gulf of Mexico
3. c) The amount of energy and matter moving in, through, and out of the system
4. d) The process or component is diminished or reduced
5. a) Emergent properties