Explain How Can Humidity Be Measured By Human Hair

Introduction “How can humidity be measured by human hair?” you may ask. There is a simple way to do it! Create a hygrometer, an instrument for measuring the level of humidity in the air.

Testable Questions:

1.What is a hygrometer?

2.How does it measure humidity?

3.How is hair affected by humidity?

: Hypothesis
I hypothesize that when the air gets very humid, the hair will curl up and move the pointer higher, because when I go out in the summertime, my hair gets frizzy. I also believe that when the humidity is low, the hair will get very straight, and move the pointer lower.
My Experiment:
4/28/2014 2 Comments Humidity…

The Natural Way to Volumize Your Hair!

“How can humidity be measured by human hair?” you may ask. There is
How does it measure humidity?

3. How is hair affected by humidity?

Hypothesis:

I hypothesize that when the air gets very humid, the hair will curl up and move the pointer higher, because when I go out in the summertime, my hair gets frizzy. I also believe that when the humidity is low, the hair will get very straight, and move the pointer lower.

The Tools I used were:

· (1) One Cup Measuring Cup

· (1) Plastic Sheet – flat – 3 inches long x 3 inches wide

· Tape

· (2) Plastic Containers

· Marker

· Styrofoam – 10 inches long x 4 inches wide

· (2) Dimes

· Human Hair - (1) strand curly (1) strand straight. The hair should be (3) inches long. The hair is the “sensing element”!

· Water

· (4) Small Nails

· Sponges

· Hair Dryer

· Rubbing Alcohol

· Q-tips

· Scissors

Procedure:

Gather the Hair!

The first thing I did was pull out three strands of my hair. It is curly and thick. Next, I pulled out three strands of my friend’s hair, which is straight and thin.

Assembling my
I ran the blow drier and the pointer started to move! I kept drying the hair until the pointer stopped moving. This is as far down as the pointer would go, so I marked this location as 0%. It was as dry as could be.

100 Percent!

The Sponge Test:

For 100% I did two tests. First, I placed the hygrometers in plastic containers with wet sponges. Then I sealed the containers and left them to sit. I created humidity inside the containers. I left them and watched to see how the pointers moved. They moved a little bit, but not much and I marked this spot as “sponge test”.

The Shower Test:

I was curious about my results. Why didn’t the pointer move very much? I had to find out. So I performed another humidity test. This time I put the hygrometers in my bathroom and left the shower on very hot water. Then I went back after about 30 minutes and checked on them. The bathroom was very steamy! I marked the spot where the pointer landed this time as “shower test”.

Independent Variable:
The level of Humidity

Dependent Variable:

The Hair which is affected by the humidity.

Controlled Variable:
The Hygrometer, which measures the humidity according to the hair.

How Hair