50+ dependent variables worksheets on Quizizz | Free & Printable - Free Printable

Let’s go through each question one by one. We’re looking for independent and dependent variables.

Remember:
- The independent variable is what you change or control in an experiment.
- The dependent variable is what you measure — it *depends* on the independent variable.

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Question 1:
*How long you sleep affects your test score. Identify the dependent variable.*
→ You’re changing how long you sleep (that’s independent).
→ Your test score changes because of that — so it’s the dependent variable.
✔ Answer: B) test score

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Question 2:
*Vitamin could extend a person’s life expectancy. The dependent variable is ______.*
→ You’re giving different amounts of vitamin (independent).
→ Life span is what you’re measuring — it depends on the vitamin.
✔ Answer: A) life span

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Question 3:
*“Do tomatoes grow faster under fluorescent, incandescent, or natural light?” What is the independent variable?*
→ You’re choosing the type of light — that’s what you’re changing.
→ Rate of growth is what you measure.
✔ Answer: A) type of light

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Question 4:
*You want to test which soil will help grass grow the tallest. The height of the grown grass is the ______ variable.*
→ Soil type = independent (you choose it).
→ Height of grass = what you measure → dependent.
✔ Answer: A) dependent

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Question 5:
*“Which brand of bubblegum will have the biggest bubble?” The size of the bubble is the ______ variable.*
→ Brand = independent (you pick the brand).
→ Size of bubble = what you measure → dependent.
✔ Answer: A) dependent

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Question 6:
*Your friends invite you to a party... staying out too long will affect how well you do on your geometry test... Your exam score is the ______ variable.*
→ Time at party = independent (you decide how long to stay).
→ Exam score = what gets affected → dependent.
✔ Answer: A) dependent

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Question 7:
*Say you want to know whether caffeine affects your appetite. The presence/absence of a given amount of caffeine would be the ______ variable. How hungry you are would be the ______ variable.*
→ Caffeine = what you change → independent.
→ Hunger level = what you measure → dependent.
✔ Answer: B) independent, dependent

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Final Answer:
1. B
2. A
3. A
4. A
5. A
6. A
7. B