LET'S MAKE A HYGROMETER

When studying the weather, an easy science activity to do is make a hygrometer, which measures the humidity. This activity is best for homeschoolers because it requires an oven. The activity works great and is easy to do.

MATERIALS

Pine cones
Aluminum foil
Oven
Water
Bowl
Cake pan

PROCEDURE

1. Place pine cones in water in the bowl.
2. Wait 45 minutes. Then draw a picture in
your science journal of the pine cones,
observing their scales.
3. Transfer pinecones to cake pan which you
have lined with foil for protection.
4. With an adult, bake the cones on low heat
in the oven for 30 minutes.
5. Remove pan from oven. Now draw a picture
of the scales in your science journal. Label.

EXPLANATION

A hygrometer measures the humidity (moisture in
the air.) A pine cone makes a good hygrometer.
When the pinecones are wet, the scales close
up. When they are dry, they open.