Question

For which of these questions could a testable hypothesis be developed? Check all that apply.

Does the width of a rubber band affect how far it will stretch?
How does the thickness of a material affect insulation?
Which of Nikola Tesla’s inventions was the coolest?
Do all objects fall to the ground at the same speed?
Which laboratory experiment is the most fun?

Answer 1

Testable:
- Does the width of a rubber band affect how far it will stretch?
- Yes. You can make a measurable hypothesis (e.g., "Wider rubber bands stretch less/more distance under a fixed load than narrower ones"), manipulate width, control load, and measure extension.
- How does the thickness of a material affect insulation?
- Yes. You can form a hypothesis (e.g., "Increasing thickness of X material reduces heat transfer rate"), vary thickness, and measure temperature change or heat flux.
- Do all objects fall to the ground at the same speed?
- Yes. You can test this (e.g., "In air, objects of different mass but similar shape fall at similar speeds; in a vacuum they fall at the same rate"), control for shape and air resistance, and measure fall times.

Not testable as written (subjective):
- Which of Nikola Tesla’s inventions was the coolest?
- "Coolest" is subjective; not a testable scientific hypothesis unless you define objective criteria (e.g., public popularity by votes).
- Which laboratory experiment is the most fun?
- "Most fun" is subjective; you could survey participants and quantify "fun" by ratings, but as stated it's not a direct testable scientific question.

If you want, I can help write specific, testable hypotheses and brief experimental plans for any of the testable questions.