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Matter Cycling: Carbon, Oxygen, and Water in Organisms
Worksheet
Grade Level
Grade 7
7.30 Matter Cycling: Carbon, Oxygen, and Water in Organisms
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Scientists briefly expose grass to carbon dioxide containing a harmless tracer. Two days later, where would tracer carbon most likely be found?
A
In the air immediately, with no chance to enter living tissues
B
In the grass first and then in insects that ate the grass
C
Only in groundwater because plants cannot store carbon
D
Only in sunlight reflected from the leaves
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