## Step2

Practical: cold and warmth senses

During the following experiment you will study how cold and warmth senses work.

Material:

- a beaker with cold water (with ice cubes)
- a beaker with warm water (about 40 degrees Celcius)
- a beaker with lukewarm water (about 20 degrees Celcius)
- a thermometer to measure the temperature of the different beakers of water

Method:

- put the index finger of your left hand in the beaker with warm water.
- put the index finger of your right hand in the beaker with cold water.
- wait for 60 seconds
- now put both index fingers in the beaker with lukewarm water

What did you notice when you put both of your fingers in the lukewarm water?

Finish the assignment below: