Gears are very important mechanisms that make machines move. Gears can speed up or slow down mechanisms depending on their size. You can hear some complex machines and gearings in these Minutes. Listen to the materials moving across each other – it can help you work out what materials the gears are made from.

What do the Minutes tell you about the machines involved?

What machines do you use that have gears like these?

Why are gears being used here?