Multiple Choice
What is the primary goal of the Law of Conservation of Mass in a chemical reaction?
2. Atoms & Elements
Law of Conservation of Mass
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In the context of the Law of Conservation of Mass, which of the following substances is not recycled but rather is lost from ecosystems?
A
Water
B
Energy
C
Carbon dioxide
D
Nitrogen
Verified step by step guidance1
Understand the Law of Conservation of Mass: This law states that mass is neither created nor destroyed in a chemical reaction. In the context of ecosystems, this means that elements like carbon, nitrogen, and water are recycled through various processes.
Identify the substances listed: Water, carbon dioxide, and nitrogen are all substances that are part of biogeochemical cycles in ecosystems. These cycles ensure that these substances are reused and recycled.
Consider the role of energy in ecosystems: Unlike matter, energy is not recycled in ecosystems. It flows in one direction, typically entering as sunlight and leaving as heat after being used by organisms.
Recognize the difference between matter and energy: Matter (such as water, carbon dioxide, and nitrogen) is recycled, while energy is lost as heat and not recycled.
Conclude that energy is the correct answer: In the context of the Law of Conservation of Mass, energy is not recycled in ecosystems, unlike the other substances listed.
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