Module 01.03
Part 1- Scenario 2
Katherine wants to investigate if the time of day a plant is watered affects the growth of the plant. She hypothesizes that a plant watered in the morning will grow faster than a plant watered at other times of the day.
1) Identify the specific independent and dependent variables that will be involved in an experiment to test this hypothesis. Independent variables: The time of day the plants were watered (examples include: sunrise, noon, sunset) Dependent variables: The resulting height of each plant
2) List at least five variables that should be controlled during the experiment. For each variable identified, give a specific suggestion for how it can be controlled during the experiment.
1) The amount of light the plants receive. This can be controlled by placing each pot on the same table, ensuring they receive the same amount of sunlight.
2) The amount of potting soil in the pots. This can be controlled by measuring an equal amount of soil for each pot.
3) The amount of seeds the pots contain. This can be controlled by placing an equal amount of seeds in each pot. For example, three seeds placed in each pot.
4) The amount of water the plants receive. This can be controlled by measuring a precise amount of water, using a tool such as a beaker, ensuring that each plant gets the same amount of water every day.
5) The size of the pots. This can be controlled by using identical pots for each plant.
Part 2
Purpose: Melatonin is a hormone made by the pineal gland, a small gland in the brain. Melatonin helps control your sleep and wake cycles. If one has difficulty sleeping, they can purchase melatonin as a natural supplement from a drug store. The question I am going to attempt to answer is: Is melatonin effective in helping people sleep? Research: I would research more about the supplement melatonin and the average amount needed to produce effective results. Two practical resources I could use are my psychiatrist as well as my
Katherine wants to investigate if the time of day a plant is watered affects the growth of the plant. She hypothesizes that a plant watered in the morning will grow faster than a plant watered at other times of the day.
1) Identify the specific independent and dependent variables that will be involved in an experiment to test this hypothesis. Independent variables: The time of day the plants were watered (examples include: sunrise, noon, sunset) Dependent variables: The resulting height of each plant
2) List at least five variables that should be controlled during the experiment. For each variable identified, give a specific suggestion for how it can be controlled during the experiment.
1) The amount of light the plants receive. This can be controlled by placing each pot on the same table, ensuring they receive the same amount of sunlight.
2) The amount of potting soil in the pots. This can be controlled by measuring an equal amount of soil for each pot.
3) The amount of seeds the pots contain. This can be controlled by placing an equal amount of seeds in each pot. For example, three seeds placed in each pot.
4) The amount of water the plants receive. This can be controlled by measuring a precise amount of water, using a tool such as a beaker, ensuring that each plant gets the same amount of water every day.
5) The size of the pots. This can be controlled by using identical pots for each plant.
Part 2
Purpose: Melatonin is a hormone made by the pineal gland, a small gland in the brain. Melatonin helps control your sleep and wake cycles. If one has difficulty sleeping, they can purchase melatonin as a natural supplement from a drug store. The question I am going to attempt to answer is: Is melatonin effective in helping people sleep? Research: I would research more about the supplement melatonin and the average amount needed to produce effective results. Two practical resources I could use are my psychiatrist as well as my