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Design and test a paper helicopter. What is the best design?
Making a scale model of the solar system
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.
This problem offers you two ways to test reactions - use them to investigate your ideas about speeds of reaction.
Can Jo make a gym bag for her trainers from the piece of fabric she has?