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Observing the Sun and the Moon
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.
Troublesome Triangles
Many natural systems appear to be in equilibrium until suddenly a critical point is reached, setting up a mudslide or an avalanche or an earthquake. In this project, students will use a simple simulation game to investigate the properties of such systems.
Age 7 to 11
Challenge Level
What shapes can you see in your flag?
Are the shapes regular or irregular?
Can you describe their angles? Can you estimate them? Can you measure them?
Does the flag have any lines of reflective symmetry?
Does it have rotational symmetry?
Does it matter which way up you hang it?
Can you find any parallel lines........ or perpendicular lines?
NRICH is part of the family of activities in the Millennium Mathematics Project.