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Laws of Thermodynamics quiz

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  • What does the First Law of Thermodynamics state about energy?
    It states that energy can be transferred and transformed, but cannot be created or destroyed.
  • Why is the First Law of Thermodynamics also called the principle of conservation of energy?
    Because the total amount of energy in the universe remains constant; it is conserved.
  • How is energy transferred from the sun to animals?
    Energy from the sun is converted to chemical energy by plants through photosynthesis, then transferred to animals when they eat the plants.
  • What organelle in plants is responsible for photosynthesis?
    The chloroplast is responsible for photosynthesis in plant cells.
  • What is entropy?
    Entropy is a measure of disorder or randomness in a system.
  • How does entropy relate to order and disorder?
    Higher entropy means greater disorder, while lower entropy means more order.
  • What is the natural tendency of reactions regarding entropy?
    Reactions tend to move systems toward maximum entropy, or greater disorder.
  • How can living organisms decrease entropy in their systems?
    They input energy to create order, thus decreasing entropy locally.
  • What does the Second Law of Thermodynamics state about energy conversion?
    It states that 100% efficient energy conversion is impossible because some energy is always lost as heat.
  • What happens to energy during each transfer between organisms?
    Some energy is lost as heat, which cannot be used by organisms.
  • How does heat relate to entropy in the universe?
    Heat lost during energy transfers increases the entropy of the universe.
  • What form of energy is heat?
    Heat is a form of kinetic energy transferred between objects with different temperatures.
  • Why can't organisms use all the energy transferred to them?
    Because some energy is always lost as heat during transfers, making it unusable.
  • What happens to the entropy of the universe with every energy transfer?
    The entropy of the universe always increases with every energy transfer.
  • How do plants and animals cycle energy and matter?
    Plants convert solar energy to chemical energy, animals consume plants, and both return nutrients to the environment, cycling energy and matter.