Maggie read that some plants grow better if the soil is acidic. She can't believe that a plant can grow when exposed to acid. Maggie decides to test if the plants she has will grow better when acid is added to the soil. She puts potting soil in tow planting containers and transplants two of her geraniums that seem about the same size into the pots. She puts the pots in the same location so that they both get the same sunlight each day, are at the sametemperature and she makes sure they get the same amount of water. However, Maggie puts a tablespoon of vinegar*in the water she gives to one of the plants. She measures the growth of the plants every week for five weeks and records the results in a data the table below:
Week
Height of Plants with Vinegar (cm)
Height of Plants without Vinegar (cm)
1
10.0
10.0
2
12.4
11.5
3
14.8
13.0
4
18.0
15.7
5
21.4
17.8
*NOTE: Vinegar is a weak acid Complete each of the following:
Identify Maggie's hypothesis: when plants are exposed to acidic soil the plant will not grow taller
Identify the independent variable: How much acid is in the soil.
Identify the dependent variable: How much the plant grows.
Identify the other variables Maggie needs to consider/control during this experiment: Amont of sunlight, amount of acid, amount of water, type of plant, more plants, type of acid, temperature of acid, temperature of enviroment, type of soil, if plant is in a pot or is it wild, how healthy the plant is, and weather conditions.
Identify the control group in this experiment: Geraniums not getting the acid.
Identify the experimental group: The geraniums recieving the acid.
What conclusions might Maggie draw from this data? Acidic soil does help plants grow.
What recommendations might you suggest for further study or for improvement? Use more Geraniums. Also test different plants to find out if it works for more plants.
Maggie read that some plants grow better if the soil is acidic. She can't believe that a plant can grow when exposed to acid. Maggie decides to test if the plants she has will grow better when acid is added to the soil. She puts potting soil in tow planting containers and transplants two of her geraniums that seem about the same size into the pots. She puts the pots in the same location so that they both get the same sunlight each day, are at the same temperature and she makes sure they get the same amount of water. However, Maggie puts a tablespoon of vinegar* in the water she gives to one of the plants. She measures the growth of the plants every week for five weeks and records the results in a data the table below:
Complete each of the following: