Let's solve both questions step by step, identifying the
independent variable,
dependent variable, and
control variables in each experiment. These are key components of scientific experiments.
---
✔ Question 1: The Zombie Cheerleader Glue Experiment
Scenario Summary:
A cheerleader creates a special glue to prevent zombie body parts from falling off during stunts. She tests it on 100 cheerleaders:
- 50 get
special glue (experimental group)
- 50 get
regular glue (placebo/control group)
After a week, they do a 2-hour game and record how many body parts fall off.
---
####
1) Independent Variable
This is the factor that the experimenter
deliberately changes.
➡️
Type of glue administered (special glue vs. regular glue)
> Why? Because she’s testing whether the *type* of glue affects body part retention.
---
####
2) Dependent Variable
This is what is
measured or observed as a result of the independent variable.
➡️
Number of body parts that fall off during the 2-hour game
> This is the outcome being measured to see if the glue works.
---
####
3) Control Variables (at least 3)
These are factors kept
constant so that only the independent variable affects the results.
✔ 1. Duration of the game – All groups do a full 2-hour game.
✔ 2. Time between glue application and game – All wait one week before the game.
✔ 3. Type of activity performed – All cheerleaders perform the same stunts during the game.
✔ 4. Number of cheerleaders per group – 50 in each group (ensures equal sample size).
✔ 5. Physical condition/age of cheerleaders – Ideally, they should be similar to avoid bias (assumed controlled).
> Any other possible control variables could include: type of uniform, environment (same field), or weather conditions.
---
✔ Question 2: Zombie School Day Length Experiment
Scenario Summary:
Zombie administrators test different school day lengths (2, 4, 6, and 8 hours) to see how it affects discipline issues among zombie students. They count the number of discipline problems after each day length.
---
####
1) Independent Variable
The factor being changed intentionally.
➡️
Length of the school day (2 hours, 4 hours, 6 hours, 8 hours)
> This is what they're experimenting with to see its effect.
---
####
2) Dependent Variable
What is being measured as an outcome.
➡️
Number of discipline issues reported during each day
> This is the response to the different day lengths.
---
####
3) Control Variables (at least 3)
Factors kept constant across all trials.
✔ 1. Type of curriculum/content taught – Same lessons or subjects for all day lengths.
✔ 2. Number of zombie students – Same class size across all days.
✔ 3. Teacher(s) involved – Same teachers teaching each session to avoid variation in teaching style.
✔ 4. Time of day – All sessions occur at the same time of day (e.g., morning) to avoid fatigue differences.
✔ 5. Classroom environment – Same room, lighting, noise levels, etc.
> These controls ensure that only the *length of the day* affects discipline issues.
---
🟩 Final Answers:
---
####
Question 1:
1.
Independent Variable: Type of glue (special vs. regular)
2.
Dependent Variable: Number of body parts that fall off
3.
Control Variables:
- Duration of the game (2 hours)
- Waiting period (one week)
- Type of cheerleading stunts performed
---
####
Question 2:
1.
Independent Variable: Length of the school day (2, 4, 6, 8 hours)
2.
Dependent Variable: Number of discipline issues
3.
Control Variables:
- Class size
- Teachers used
- Curriculum content
- Time of day
- Classroom environment
---
💡
Bonus Tip: In science experiments, identifying these variables helps ensure the results are valid and reliable. The independent variable is what you change, the dependent variable is what you measure, and control variables keep everything else fair.
And yes — teaching zombies must be *very* challenging! 😄
Parent Tip: Review the logic above to help your child master the concept of identifying independent and dependent variables worksheet middle school.
