Identifying Manipulated and Responding Variables - Free Printable

Problem Analysis:

The task involves identifying the manipulated variable and the responding variable in each scenario. Let's break down each scenario step by step.

#### Definitions:
1. Manipulated Variable: This is the variable that the experimenter changes or controls to observe its effect on another variable.
2. Responding Variable: This is the variable that is measured or observed to see how it responds to changes in the manipulated variable.

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Solution:

#### Scenario 1:
- You spray mosquito repellent on one arm and count how many mosquitoes bite you.
- Manipulated Variable: Whether mosquito repellent is sprayed on the arm (presence or absence of repellent).
- Responding Variable: The number of mosquito bites.

#### Scenario 2:
- A mouse is given a drug and then runs a maze. The time it takes to complete the maze is compared to the time it took for it to complete the maze without the drug.
- Manipulated Variable: Whether the mouse is given the drug (presence or absence of the drug).
- Responding Variable: The time it takes for the mouse to complete the maze.

#### Scenario 3:
- You place different colored liquids in a hummingbird feeder and count how many hummingbirds visit.
- Manipulated Variable: The color of the liquid in the hummingbird feeder.
- Responding Variable: The number of hummingbirds that visit the feeder.

#### Scenario 4:
- You give one plant fertilizer and compare how tall it grows to a plant that has not been fertilized.
- Manipulated Variable: Whether the plant receives fertilizer (presence or absence of fertilizer).
- Responding Variable: The height of the plant.

#### Scenario 5:
- Listening to crickets, you count how many chirps you can hear at different temperatures.
- Manipulated Variable: The temperature.
- Responding Variable: The number of cricket chirps heard.

#### Scenario 6:
- You place two fish in different sized tanks, after a month, you measure the length of the fish.
- Manipulated Variable: The size of the tank.
- Responding Variable: The length of the fish.

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Final Answer:

For each scenario, the manipulated and responding variables are as follows:

1. Manipulated Variable: Presence/absence of mosquito repellent
Responding Variable: Number of mosquito bites

2. Manipulated Variable: Presence/absence of drug
Responding Variable: Time to complete the maze

3. Manipulated Variable: Color of liquid
Responding Variable: Number of hummingbirds visiting

4. Manipulated Variable: Presence/absence of fertilizer
Responding Variable: Height of the plant

5. Manipulated Variable: Temperature
Responding Variable: Number of cricket chirps

6. Manipulated Variable: Size of the tank
Responding Variable: Length of the fish

$$
\boxed{
\begin{array}{ll}
\text{1. Manipulated: Presence/absence of repellent, Responding: Number of bites} \\
\text{2. Manipulated: Presence/absence of drug, Responding: Time to complete maze} \\
\text{3. Manipulated: Color of liquid, Responding: Number of hummingbirds} \\
\text{4. Manipulated: Presence/absence of fertilizer, Responding: Height of plant} \\
\text{5. Manipulated: Temperature, Responding: Number of cricket chirps} \\
\text{6. Manipulated: Size of tank, Responding: Length of fish}
\end{array}
}
$$