Question

Johnny Beanseed did a plant experiment using bean plants in pots with different amounts of water each day. He wondered how much water to give the plants each day. Johnny used 4 plants for each amount of water, meaning he had 4 trials. After 6 weeks, he measured the plant height.

Answer the questions below:
A) he independent variable (tip I = I change) is:
B) The dependent variable is:
C) give 2 or more examples of things that should be constant in his experiment:
D) Here are Johnny’s measurements for plant height with 4 ounces of water per day:
8, 8.5, 9 and 9 ½ centimeters (cm). The mean is: ______ cm
E) Johnny’s little brother said that the mean for the above question is 11.7 cm. Explain why this answer is wrong:

Answer 1

Answer:A) The independent variable in Johnny's experiment is the amount of water given to the plants each day.

Explanation:

i took the test and got an 80

Answer 2

A) The independent variable in Johnny's experiment is the amount of water given to the plants each day.

B) The dependent variable is the height of the bean plants after 6 weeks of being given different amounts of water each day.

C) Examples of things that should be constant in Johnny's experiment are:

• The type of bean plant used in the experiment
• The size of the pots used for each plant
• The type of soil used for each plant
• The amount of sunlight and temperature each plant received
• The location of the plants in the room

D) The mean height of the bean plants with 4 ounces of water per day is 8.75 cm.

E) Johnny's little brother is wrong because the mean height of the bean plants is actually 8.75 cm, not 11.7 cm. It's important to use the actual measurements taken from the experiment to calculate the mean, rather than making up a number that is not supported by the data.