Analyze and explain how energy flows and matter cycles through systems and how energy and matter are conserved through a variety of systems.
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Q 1/5
Score 0
In an ecosystem, energy flows from the Sun to producers and then to consumers, with about 90% of energy lost as heat at each level. Which statement correctly describes how this energy loss relates to the conservation of energy?
30
Energy is converted back into matter by the consumers to ensure that the total mass of the ecosystem remains the same.
Energy is destroyed during the metabolic processes and therefore cannot be conserved within the biological system.
Energy is transformed into thermal energy and released into the environment, so the total amount of energy remains constant.
Energy is recycled from the tertiary consumers back to the producers to restart the flow of energy through the food web.
Q 2/5
Score 0
In a closed food web, if a primary consumer eats a producer, which statement best explains how the Law of Conservation of Mass applies to this system?
30
The total mass increases as the consumer grows larger and adds new biological material to the local ecosystem over time.
The total mass of the matter is the same because the atoms are rearranged into the consumer's body or released as waste.
The total mass changes because the chemical energy stored in the producer is destroyed when the consumer digests the food.
The total mass decreases because energy is lost as heat to the surrounding environment during the process of digestion.
5 questions
Q.
In an ecosystem, energy flows from the Sun to producers and then to consumers, with about 90% of energy lost as heat at each level. Which statement correctly describes how this energy loss relates to the conservation of energy?
1
30 sec
8.5(E)
Q.
In a closed food web, if a primary consumer eats a producer, which statement best explains how the Law of Conservation of Mass applies to this system?
2
30 sec
8.5(E)
Q.
Which of the following best explains how matter is conserved in a forest ecosystem when a fallen tree decays over several years?
3
30 sec
8.5(E)
Q.
Which of the following scenarios best demonstrates the cycling of matter and the conservation of mass within a closed terrestrial system?
4
30 sec
8.5(E)
Q.
In a food pyramid, the amount of available energy decreases as it moves from the producers to the top predators. According to the Law of Conservation of Energy, what happens to the energy that is not passed on to the next trophic level?
