The document provides an assignment to investigate the impact of fertilizer amounts on plant growth. To properly conduct this investigation, the following factors would need to be controlled: the amount of water given to each plant, keeping track of the fertilizer amounts given to each plant, starting with plants of the same size, and keeping all plants in a similar location. Variables like the amount of fertilizer and location of the plants would need to be manipulated, while the dependent variable of plant height would be measured.
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Friction
1. Your teacher has given you the following assignment: Investigate the
impact on plant growth of adding various amounts of fertilizer to potted
plants. Think about what you would need to do to be certain that the
fertilizer was having an impact on plant growth. Then answer the items
below.
Write “yes” for each of the items below that would be part of your plan
to investigate plant height and fertilizer. Write “no” for each of the
items below that would not help you investigate plant height and
fertilizer.
1. Put one plant in a sunny windowsill and one in a dark corner.
2. Give plants the same amount of water.
3. Give different plants different amounts of fertilizer without keeping
track of which plant got extra fertilizer.
4. Use some new plant seeds and some old plants that have been growing
for months.
5. Start with plants that are the same size.
6. Keep all plants in a similar location.
7. Carefully note amounts of fertilizer each plant is given.
8. Keep one plant fertilized but with no water.
No
Yes
No
No
Yes
Yes
Yes
No
