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18. |
a. a plant |
d. DNA |
h. chemicals |
l. an experiment |
p. a telescope |
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b. a microscope |
e. electricity |
i. a scientist |
m. mold |
q. the Earth |
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c. fire |
f. a satelite |
j. a battery |
n. bacteria |
r. a meteor |
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g. a planet |
k. an atom |
o. a magnet |