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16 November, 11:10

Fill-in-the-blank

Word Box (one term per response - no repeating, but you will not use every term):

*Metabolism

*Covalent

Electrons

Hydrogen ions

*Protons

*Ionic

*Controlled Experiment

18. An experiment in which only one variable is changed is a (an)

_experiment

19. The combination of chemical reactions through which an organism builds up or breaks down

materials as it carries out its life processes is called

20. Neutrons and

are found in the nucleus of an atom.

21. A chemical bond formed by the transfer of electrons is a (an)

bond

22. The pH scale is a measurement system that indicates the concentration of

in a solution

+3
Answers (1)
  1. 16 November, 11:24
    0
    Answer and Explanation:

    18. An experiment in which only one variable is changed is a (an) controlled experiment.

    19. The combination of chemical reactions through which an organism builds up or breaks down materials as it carries out its life processes is called metabolism.

    20. Neutrons and protons are found in the nucleus of an atom.

    21. A chemical bond formed by the transfer of electrons is a (an) ionic bond.

    22. The pH scale is a measurement system that indicates the concentration of hydrogen ions in a solution.
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