In an experiment, which variable is deliberately changed by the researcher?
- A. Controlled variable
- B. Dependent variable
- C. Independent variable
- D. Random variable
GED • Science
Practice interpreting experiments, evidence, charts, and scientific information in focused sessions.
Start free. No card required to create an account.
Easy to start
Select a GED subject, session size, and difficulty.
Answer focused questions at your own pace.
See your score, then review every question, answer, and explanation to choose what deserves attention next.
Try the format
See a short example. Your account keeps practice results together so patterns become easier to spot.
Independent variable. The independent variable is deliberately changed to observe its effect on the dependent variable.
Targeted content
Work on a subject or skill instead of opening another random exercise list.
Use your history to find patterns and choose your next review.
AI assists practice and feedback while the learning goal stays in focus.
Clear plans
Free
Plus
Premium / 3-Month Pass
Paid plan names, prices, limits, and renewal terms are proposals under validation and will be displayed before checkout.
Frequently asked questions
The test emphasizes scientific reasoning and interpreting information as well as core concepts.
Yes. Practice includes data, graphics, and experimental reasoning.
Yes. The experience is designed to support focused daily practice.
Your next step can be small
A focused session can turn a study goal into a routine.