Identifying Parts of an Investigation:

Name________________________________________ Period___________

Preview Questions:

What is the main purpose of this experiment?

What will you graph?

What is on the X axis?

What is on the Y axis?

What factors are constant in the experiment? (how are the plants treated the same)

What are the variables? ( how are the plants treated differently)

What is the control in the experiment? (what plants are not treated?)

What is your hypothesis? (What do you think is going to happen?)

Plant Height (cm)
Week	Fertilizer A	Fertilizer B	Fertilizer C	Fertilizer D
1	0	0	0	0
2	2	4	1	1
3	5	8	5	4
4	9	13	8	7
5	14	18	12	10
6	20	24	15	13
7	27	31	19	16
8	36	39	22	20

Finish the graph by completing the data for fertilizer C and D and completing the labels for the graph.

A gardener was interested in helping her plants grow faster. When she went to the nursery, she found three fertilizers available for her plants. One of the fertilizers, fertilizer A, was recommended to her. However, she decided to conduct a test to determine which of the three fertilizers, if any, helped her plants grow the fastest. The gardener planted four seeds, each in a separate pot. She used the same type of pot and the same type of soil in each pot. She fertilized one pot with fertilizer A, one with fertilizer B, and one with fertilizer C. She did not fertilize the fourth pot. She placed the four pots near one another in her garden. She made sure to give each plant the same amount of water each day. She measured the height of the plants each week and recorded her data. After eight weeks of careful observation and record keeping, she had the following table of data.

Mary Frederick

2010-09-27

HP