Question

question 1 (1 point)
match the right vocabulary word with the right definition.

column a

1. ____ the factor that the researcher deliberately changes or manipulates to test its effects
2. ____ the specific group in an experiment that is exposed to the independent variable or treatment being tested
3. ____ factors that are kept exactly the same across all groups to ensure a fair test and isolate the cause.
4. ____ the measurable outcome or result that changes in response to the manipulation.
5. ____ a group that receives no treatment or a placebo; serves as a baseline for comparison.

column b
a. dependent variable
b. controlled variables (constants)
c. experimental group
d. control group
e. independent variable

question 2 (1 point)
to obtain the most robust data possible, researchers should manipulate multiple independent variables simultaneously within a single experimental setup
∘ true
∘ false

question 3 (1 point)
the dependent variable answers the question: what am i observing or measuring in response to the change?
∘ true
∘ false

question 4 (1 point)
if controlled variables (constants) are not properly managed, it becomes impossible to determine if the result was caused by the independent variable or an external factor
∘ true
∘ false

question 5 (1 point)
scenario 1: fertilizer test
a botanist wants to determine if a new brand of fertilizer causes tomato plants to grow taller than a standard brand. she treats five plants with the new fertilizer and five plants with the standard fertilizer. all plants receive the same amount of water and sunlight.
what is the independent variable in this experiment?
∘ a. the amount of water given
∘ b. the height of the tomato plants
∘ c. the type of fertilizer used
∘ d. the amount of sunlight received

Explanation:

Question 1

1. The factor manipulated by the researcher is the Independent Variable (e).
2. The group exposed to the independent variable is the Experimental Group (c).
3. Factors kept the same are Controlled Variables (Constants) (b).
4. The measurable outcome is the Dependent Variable (a).
5. The group with no treatment is the Control Group (d).

Manipulating multiple independent variables simultaneously in an experiment makes it hard to determine which variable caused the result, so it's not ideal for valid data. Thus, the statement is False.

The dependent variable is what is measured in response to changes in the independent variable, so the statement is True.

Answer:

1. e. Independent Variable
2. c. Experimental Group
3. b. Controlled Variables (Constants)
4. a. Dependent Variable
5. d. Control Group

Question 2