name:______________________ period:____________________ date:____________________ 2. scenario: a student is…
name:______________________ period:____________________ date:____________________ 2. scenario: a student is testing which brand of paper towel is the most absorbent. he pours 100 ml of water onto a paper towel from three different brands and measures how much water each towel soaks up. manipulated variable responding variable controlled variables 3. scenario: does the temperature of a tennis ball affect how high it bounces? a student heats one ball to 30°c, cools another to 5°c, and keeps a third at room temperature (20°c). she drops each ball from a height of one meter and measures the bounce height. manipulated variable responding variable controlled variables 4. scenario: a researcher wants to see if the amount of fertilizer affects the number of tomatoes a plant produces. she applies different amounts of fertilizer to four identical tomato plants and counts the number of tomatoes on each plant at the end of the season. manipulated variable responding variable controlled variables
Answer
Explanation:
Scenario 2:
Step1: Identify manipulated variable
The variable the student changes is the brand of paper - towel.
Step2: Identify responding variable
The variable that changes in response is the amount of water the towel soaks up.
Step3: Identify controlled variables
The amount of water poured (100 mL), the surface on which the towel is placed, etc. are controlled.
Manipulated Variable: Brand of paper - towel Responding Variable: Amount of water soaked up Controlled Variables: Amount of water poured, surface on which towel is placed
Scenario 3:
Step1: Identify manipulated variable
The variable the student changes is the temperature of the tennis - ball.
Step2: Identify responding variable
The variable that changes in response is the bounce height of the tennis - ball.
Step3: Identify controlled variables
The drop height (1 meter), the type of tennis - ball, etc. are controlled.
Manipulated Variable: Temperature of tennis - ball Responding Variable: Bounce height of tennis - ball Controlled Variables: Drop height, type of tennis - ball
Scenario 4:
Step1: Identify manipulated variable
The variable the researcher changes is the amount of fertilizer.
Step2: Identify responding variable
The variable that changes in response is the number of tomatoes a plant produces.
Step3: Identify controlled variables
The type of tomato plant, the size of the pot, the amount of sunlight, etc. are controlled.
Manipulated Variable: Amount of fertilizer Responding Variable: Number of tomatoes a plant produces Controlled Variables: Type of tomato plant, size of pot, amount of sunlight
Answer:
Scenario 2: Manipulated Variable: Brand of paper - towel Responding Variable: Amount of water soaked up Controlled Variables: Amount of water poured, surface on which towel is placed
Scenario 3: Manipulated Variable: Temperature of tennis - ball Responding Variable: Bounce height of tennis - ball Controlled Variables: Drop height, type of tennis - ball
Scenario 4: Manipulated Variable: Amount of fertilizer Responding Variable: Number of tomatoes a plant produces Controlled Variables: Type of tomato plant, size of pot, amount of sunlight