"How Water Gets Hot" Drinking Water PPT Courseware

"How Water Gets Hot" Drinking Water PPT Courseware

If the fire is burning outside, how can the water inside get hotter and hotter?

Could it be that the fire heats the pot first, and then the pot heats the water?

Kind tips:

1. Fill in the experimental plan first and receive materials according to the experimental needs.

2. The group divides the work and cooperates, and the experimental equipment is installed before heating.

3. Operate carefully, observe the experimental phenomena carefully, and fill in the record form.

4. Pay attention to safety and be careful not to burn your hands.

I found it……

Heat always travels from the hotter end to the cooler end.

Thermal conduction is a heat transfer method that transfers heat from one object to another object, or from one part of an object to another part, through direct contact.

After the bottom of the pot is heated, it first transfers heat to the water in the lower part of the pot. So how does the water in the upper part of the pot become hot? Take a guess.

Based on the observed phenomena, how does the water in the upper part of the pot become hotter?

After the bottom of the kettle is heated, it first transfers heat to the water in the lower part of the kettle. The water at the bottom absorbs the heat of the kettle. When the water at the bottom is heated, it will rise, and the cold water above will flow over to replenish it. This cycle repeats. , the water above becomes hotter.

Based on the above experimental discussion, how does the water in the pot transfer heat? Write down the results of the discussion.

Water will flow when heated, and water transfers heat by convection.

Now can you tell me how the water in the pot becomes hot?

When the bottom of the container is heated, the heat at the bottom is transferred to the water at the bottom. The heated water at the bottom will rise, and the cold water around and above will come to replenish it, and then it will be heated and rise again. This will cause the cold water and hot water to continuously flow relative to each other, resulting in In the form of convection, the water in the container becomes hot through convection.

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