2. Identify the dependent and independent variables in the following investigati
ID: 140042 • Letter: 2
Question
2. Identify the dependent and independent variables in the following investigations. (Circle the dependent variableand underline the indepen- dent variable.) a. Scientists inject 50 people with an experimental vaccine immediately after exposure to Ebola and 50 different people after a 21-day delay. The number of people who contract Ebola are counted. b. Coral reefs compete for light and space with seaweeds that may cover the coral like a lawn. Scientists measure the percent of coral with seaweed and the rate of coral growth in test plots with and with- out goby fish present. covered c. Researchers use a molecular tool called CRISPR to modify a gene in 35 beagle embryos to test if the modified gene will increase the amount of muscle produced by the dogs.Explanation / Answer
Variables in any investigation used in math and science is the factor that can be changed. Depending upon the experiment, different kinds of variables are found such as
Manipulate/Independent variable
Factor that can be changed by the person doing the experiment; "manipulated variable"
Response/dependent variable.
Factors being measured in an experiment; changes in response to the changes in the independent/manipulated variable; also known as the "response variable".
a.
Independent/manipulated variable: people with an experimental vaccine immediately after Ebola exposure.
Response/dependent variable: people who contract Ebola
b. Independent/manipulated variable: Coral reefs compete for light and space with seaweeds.
Response/dependent variable: percent of coral covered with seaweeds and the rate of coral growth with and without goby fish present.
c. Independent/manipulated variable: Use of molecular tool CRISPR
Response/dependent variable: increase in the amount of muscles produced by the dogs
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