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7th Grade Science Unit 3.5 till 4.5

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  • What is an organism?
    A living thing.
  • What does replication mean?
    Making copies of itself.
  • What is chemical energy?
    Energy stored in food, batteries, and fuels like coal and wood.
  • What is the definition of movement?
    The ability of organisms to change position or shape.
  • What is special about a liger?
    It is infertile and cannot reproduce.
  • What is gravitational potential energy?
    Energy stored when objects are raised against gravity.
  • What is the role of vaccines in viral infections?
    To help prevent illnesses by stimulating the immune system to recognize and fight viruses.
  • What does "fertile" mean?
    Being able to produce offspring.
  • What is RNA in a virus?
    A substance containing coded instructions for making more viruses.
  • What is useful energy?
    Energy transferred in the desired form, like light from a lamp.
  • How do biologists use keys?
    To help them identify organisms.
  • What is protein?
    A chemical that is a necessary part of the cells of all living things.
  • What is dissipated energy?
    Energy that spreads out and becomes less useful, like heat that cannot be reused.
  • What is respiration?
    Breaking down food to provide energy.
  • How do you construct a dichotomous key?
    Think of a way to split organisms into groups, divide each group into two, and repeat until each organism can be identified.
  • What is nutrition?
    Feeding; taking in substances needed for growth or energy.
  • What is sensitivity?
    The ability of an organism to notice and respond to changes.
  • What is a virus?
    An extremely small structure made of a protein coat surrounding RNA.
  • How do living organisms use sensitivity?
    To notice and respond to changes in their environment.
  • What is thermal energy?
    Heat energy transferred to colder objects.
  • What is elastic potential energy?
    Energy stored when objects are stretched or compressed.
  • What is the definition of excretion?
    Getting rid of waste materials, such as carbon dioxide.
  • What happens during respiration?
    Food is broken down to release energy for the organism.
  • What is a specimen?
    A sample.
  • What are the seven characteristics of living organisms?
    Feeding, respiration, growth, movement, sensitivity, excretion, and reproduction.
  • What does "infertile" mean?
    Unable to produce offspring.
  • What is the definition of growth?
    A permanent increase in size.
  • What does it mean to reproduce?
    The ability of organisms to produce young.
  • What does "dichotomous" mean?
    Branching into two.
  • What is an electron microscope used for?
    To see viruses because they are very small.
  • How do biologists identify organisms using keys?
    By asking a series of yes/no questions based on characteristics.
  • What is the difference between useful and wasted energy?
    Useful energy is transferred in the desired form, while wasted energy dissipates as heat or sound.
  • What is energy?
    The capacity to do work or produce change.
  • How do viruses replicate?
    They invade living cells, use the cell's machinery to replicate, and burst out to infect more cells.
  • What does "cannot" mean?
    Means is not possible
  • What is an example of energy transfer in power stations?
    Chemical energy → Thermal energy → Kinetic energy → Electrical energy.
  • What is the definition of species?
    A group of organisms that can reproduce with others in the same species.
  • What is kinetic energy?
    Energy due to movement.
  • What is variation?
    Differences between individuals of the same species.
  • What does "identical" mean?
    Exactly the same.
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