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