All living systems obey the laws of conservation of mass and energy. These laws state that mass and energy cannot be __________ nor destroyed. Chemical reactions, such as photosynthesis and cellular respiration, demonstrate the law of conservation of mass, as the mass of the reactants equals the mass of the __________, and the total number of __________ of each element is the __________ on both sides of the chemical equation. Ecosystems demonstrate the law of conservation of energy. The total amount of energy in the system is constant, however, the energy available in a food chain/web decreases as you move through trophic levels due to the transfer of __________ energy to the environment.

All living systems obey the laws of conservation of mass and energy. These laws state that mass and energy cannot be transformed nor destroyed. Chemical reactions, such as photosynthesis and cellular respiration, demonstrate the law of conservation of mass, as the mass of the reactants equals the mass of the products, and the total number of atoms of each element is the same on both sides of the chemical equation. Ecosystems demonstrate the law of conservation of energy. The total amount of energy in the system is constant; however, the energy available in a food chain/web decreases as you move through trophic levels due to the transfer of thermal energy to the environment.

Explanation: The laws of conservation state that mass and energy can change forms but cannot be created or destroyed. In chemical reactions, the number of atoms remains unchanged, demonstrating that mass is conserved. In ecosystems, while the total energy remains constant, some energy is lost as heat, which is why energy decreases at higher trophic levels.

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