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rodikova [14]
3 years ago
10

Mark is performing an investigation to determine what type of fertilizer helps a plant grow best. He plants ten plants of the sa

me type in a garden and gives them all the same amount of water and fertilizer each day. However, he gives each plant a different type of fertilizer. Which variable in the experiment should Mark control (or keep constant)? A. location of the plants B. amount of fertilizer given daily C. amount of water given daily D. all of these Reset Submit
Arts
1 answer:
balandron [24]3 years ago
6 0

Answer:

D. All of these

Explanation:

Mark should control (or keep constant) the location of the plants, the amount of water the plants receive daily, and the amount of fertilizer the plants recieve daily. The only variable that should change is the type of fertilizer that is given to each plant.

During a scientific experiment, only variable should be changed by the investigator. All other variables should be kept constant.

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