Answer:
D: There is no wind on the moon
Answer:
a. double-blind experiment
Explanation:
A double-blind study <em>is done when the participants and experimenters do not know who is receiving which treatment in order to prevent bias.</em> We can conclude this is the correct answer because the results are being shared anonymously.
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Answer:
From the soil.
Explanation:
Soil has non-organic and organic matter, therefore it is beneficial to the plant. The non-organic part of the soil is sediment, which has many minerals that the plant can use to its advantage.
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