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On Monday we learned about a vulnerability in the encryption technology that effects most of the internet, called Heartbleed. Our team grabbed their lab coats and leaped into action to patch the vulnerability on our site.

We are happy to announce SteveSpanglerScience.com is no longer vulnerable.

While we believe we have kept out all the bad guys, we want to make sure our customer's information is safe. We are requiring that all of our customers change their password for their accounts on SteveSpanglerScience.com.

To do so, click the link below and enter in the email address associated with your account. Once you receive an email to that account, follow the simple instructions to reset your password.

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If you have any questions about the vulnerability please email security@SteveSpangler.com

As this did effect most of the internet, we also recommend that you change your passwords on all of the websites you visit.

Thank you for being an amazing customer!

-- The SteveSpanglerScience.com Team

Questions? Give us a Call: 1-800-223-9080

Galileo Thermometer & Barometer

This unique thermometer and barometer combination is amazing.


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Item #: WTHM-700

Usually ships the next day.

Recommended for age 8 and up with adult supervision.

Availability: In stock

Galileo Thermometer & Barometer

This unique thermometer and barometer combination is perfect for the weather enthusiast or someone who just loves science. This functional and attractive decoration features a thermometer based on Galileo's (1564-1642) discovery that the density of fluid expands and contracts depending on temperature. The density of the liquid in each sphere varies slightly and as the actual room temperature fluctuates, the glass spheres will rise or fall. The water level in the barometer rises and falls with the changing of the air pressure. Now you can forecast the weather in the most elegant way. Recommended for children ages 10 and up.

**Not intended for outdoor use.**

What's Included?
  • Galileo Thermometer
    • 11" tall x 2" base x 1.5" middle diameter
    • Floating bulbs that measure 64º, 68º, 72º, 76º, and 80º Fahrenheit 
  • Globe barometer
    • 4.5" tall x 3" base x 3.5" middle diameter
  • Wooden base
    • 9" x 4.75"
  • 20 mL plastic syringe 
  • Instruction and information manual
How Does It Work?

The basic concept behind a Galileo Thermometer is that as the temperature of the air outside the thermometer changes, the temperature of the water does, as well. As the temperature of the water changes, expanding as it gets warmer or contracting as it gets cooler, the density of the water changes, too. Sense the density in the bulbs cannot change (they're completely full with water and oil), they will float or sink depending on the water's density. The bulb that sinks the most indicates the approximate current temperature.

What Does It Teach?

The relationship between the water's ever changing density and the unchanged density of the bulbs is a great display of density. Density is a measure of how much matter is in a fixed area and is calculatable by mass ÷ volume. The Galileo Thermometer is also a great way to observe how temperature effects air pressure as well as density.

Customer Reviews

Galileo thermometer Review by Russell Kohnken

seems to work well. feels fragile. (Posted on 4/22/13)

Beautiful and educational Review by COinCO

We have enjoyed our barometer and thermometer very much. Works perfectly. (Posted on 4/6/13)

wonderful Review by Lisa Tunney

I loved this product, it was everything I expected when I ordered it. Since it was a gift, my nephew, who collects these type of thermometers also loved it and did not have one like it! I was so pleased it came in time for Christmas and everything worked out. Thank you! (Posted on 2/17/13)

Conversations Starter Review by Paul

This thermometer/barometer set has been fantastic. It is highly accurate and an awesome conversation starter. I have had everyone from students to adults ask about the set. An awesome and decorative teaching tool! (Posted on 2/10/13)

Makes weather pretty... Review by Zarah

This is a really beautiful item! It also is very scientific - it encompasses temperature, density, air pressure and weather. I love it! (Posted on 12/20/12)

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Warning - Choking Hazard