Earth Science

7. Compare the readings of a real, commercially-available barometer outside with those of a
   barometer inside. (Alternatively, use the newspaper or web-based weather forecasts to obtain true
   pressure readings).

DATA TABLE:

Day

Home Made Barometer

Reading

Actual Barometer

Reading

Description of Day’s

Weather

1

2

3

4

5

Questions:

1. Explain how this barometer works:


2. Why is it important to make sure that the balloon is affixed tightly (no air leaks) to the coffee can?


3. Study the data you have collected. What is the relationship between the...
   a. your barometer readings and actual barometer readings?

b. current weather conditions and your barometer readings?

4. If you were to redesign the barometer, what improvements would you make and why?