Exam 2: Science, Matter, Energy, and Systems

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The forms of an element with the same atomic number and different mass numbers are known as ____________________.

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isotopes

According to the first law of thermodynamics,energy input is

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C

Forms of an element having the same atomic number but different atomic mass numbers are called

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C

Humans intervene in the phosphorus cycle in all of the following ways except

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The number of protons in the nucleus of an atom equals to its ____________________.

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The smallest unit of matter into which an element can be divided and still retain its chemical properties is a(n)____________________.

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The water cycle,hydrogen cycle,phosphorus cycle,and oxygen cycle are all ____________________ cycles.

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An important feature of reliable science is skepticism.

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The place where an organism lives is its

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Which of the following statements about human alteration of the nitrogen cycle is false?

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The organisms that are classified as primary consumers are the

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  -How much energy would potentially be available if a fifth trophic level was added to the pyramid? -How much energy would potentially be available if a fifth trophic level was added to the pyramid?

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The part of Earth where living organisms are found is called the

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Solar energy can be direct or produce other indirect sources of energy. Give three examples of indirect sources of solar energy.

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The level of organization in Ecology from the smallest to the largest unit is

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Which of the following is not part of the scientific method?

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Humans interfere with the natural nitrogen cycle by logging activities.

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____________________ is a measure of how useful a form of matter is to humans as a resource.

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A community of different species interacting with one another and with energy and matter is called a(n)____________________.

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____________________ is the terrestrial ecosystem in which you would find the fewest decomposers.

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