Make a hygrometer. Drawing, description

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Make a hygrometer. Children's Science Lab

Children's Science Lab

Directory / Children's Science Lab

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For experience you need:

2 identical thermometers;
cotton wool;
rubber bands;
an empty yogurt cup;
water;
a large cardboard box without a lid;
spoke.

Make a hygrometer

1. Poke two holes in the wall of the box with a knitting needle at a distance of 10 cm from each other.

2. Wrap two thermometers with the same amount of cotton and secure with rubber bands.

3. Tie a rubber band around the top of each thermometer and thread the rubber bands through the holes at the top of the box. Insert a knitting needle through the rubber eyelets, as shown in the figure, so that the thermometers hang freely.

4. Place a glass of water under one thermometer so that the water wets the cotton wool (but not the thermometer).

5. Compare thermometer readings at different times of the day. The greater the temperature difference, the lower the humidity.

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