Build a mini eco-system, and collect and interpret data on how well the plants grow under different conditions.
Do you know which birds are regular visitors where you live?
Investigate how avalanches occur and how they can be controlled
This problem offers you two ways to test reactions - use them to investigate your ideas about speeds of reaction.
A geographical survey: answer the tiny questionnaire and then analyse all the collected responses...
You may like to read the article on Morse code before attempting this question. Morse's letter analysis was done over 150 years ago, so might there be a better allocation of symbols today?
How does the time of dawn and dusk vary? What about the Moon, how does that change from night to night? Is the Sun always the same? Gather data to help you explore these questions.
How well can you estimate 10 seconds? Investigate with our timing tool.
Can you coach your rowing eight to win?