What a testable question is
A testable question is a question that you can answer with an investigation and data.
Which plant food is the best?
Not testable
"Best" is an opinion. You cannot measure an opinion.
Does the amount of plant food change the height of a plant?
Testable
You can change the amount of plant food and measure the height.
Investigation: a test that you plan and do to collect data. Data: facts and measurements that you collect.
Change a vague question into a testable question
Variable: a thing that can change in an investigation.
Try it
Sort 8 questions: testable or not testable?
- Read the question in the box.
- Ask: "Can I change 1 thing and measure the result?"
- Click Testable or Not testable.
Read the question. Then click Testable or Not testable.
Quick check
Answer 5 questions. You see your score at the end.