The Moon causes high tides. During which season are the tides the highest? What is the phase of the Moon when tides are highest? When the Moon is full, the tides will be at their highest.
I gave my students this multiple choice question: Which is a hypothesis that can be easily tested?

Only one answer is correct among these 4 choices:
- The Moon causes high tides.
- During which season are the tides the highest?
- What is the phase of the Moon when tides are highest?
- When the Moon is full, the tides will be at their highest.

Could you tell me which one is correct?

When the Moon is full, the tides will be at their highest.