These are gear wheels. Can you see the teeth or cogs? How do they work?
If the smallest gear turns clockwise, which way do the others turn? Which gear wheel turns fastest?
Added:
27th Feb 2009
Subjects:
Design and Technology, Science
Key Stages:
Key Stage 1, Key Stage 2, Key Stage 3, Key Stage 4
Keywords:
Gears Pulley Cogs
Related Links:
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3 Gear wheels on the threshing machine
