Scientific experiments are specially designed to test explanations for an observed phenomenon. a student decides to conduct an experiment to determine the effect that the amount of time spent in the sunlight has on the overall growth of a plant. the student will conduct the experiment using two identical plants that will only spend different amounts of time in the sunlight. all other aspects needed for growth will remain identical for each. in the experiment described, what would the amount of water given to each plant be considered?
a.
an observation
b.
a dependent variable
c.
an independent variable
d.
a control or constant
select the best answer from the choices provided
a
b
c
d

D. A control or constant

Explanation:

Because the purpose of the study is to determine the effect of the amount of sunlight on the growth of a plant, all other factors must remain the same to ensure that only the sunlight is the only factor that elicited change, if any, on the growth of the plant.

Control or constants are factors tht are the same for all test subjects. In this case, water would be one of them. If the researcher were to make the amount of water given between the plants, it could affect the growth of the plant making it hard to determine whether sunlight was what affected it.

stimulus is a change in the environment that causes an organism to react. the response is the reaction to the stimulus. some examples of stimuli for zebras are drought, to many predators, and bad feeding grounds such as dead grass or plants. zebras respond to stimuli just like all other living organisms

a researcher conducts an experiment on the secretion of a particular hormone in mice. scientists inject mice with a substance that stimulates the production of the hormone. the scientists then test the levels of hormones produced by the mice. the tool used to measure the hormones consistently detects the levels at 10 points lower than the actual hormone levels in the mice. this tool makes measurements, but the measurements aren't .

explanation:

no u