Materials needed: 2 identical beakers, measuring cylinder; hot water; cold water; food colouring or ink; eye-
dropper or teat pipette
Safety: Use hot, but NOT boiling water for this activity.
1. Pour equal amounts of hot water and cold water into two separate beakers.
2. Holding the eye dropper or teat pipette about 1 cm above the surface, put two drops of colouring into
each beaker
-eye dropper
how water
cold water
ink-
3. Observe the beakers for about 5 minutes, and note any differences between them.
Describe how the movement the molecules in hot water must be different from that in cold water to
account for your observations.
State the general conclusions you can draw from this experiment.
Does this conclusion support the idea that heat is the movement of molecules?
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