Measuring Air Pressure

Measuring Air Pressure Science 8 Unit 1 – Topic 7

Read the following instructions carefully.

1. Save this file in your folder as “Air Pressure”. 2. Place your name as a header on the right. 3. Place the date as a footer on the bottom right.

Go to “It’s a Breeze” at http://kids.earth.nasa.gov/archive/air_pressure/. Answer the following questions. Make your answers bold.

a) When it’s compressed, air is said to be : b) Weather forecasters measure air pressure with a: c) Barometers are used to measure the current air pressure at a particular location in: d) Earth's atmosphere is pressing against each square inch of you with a force of: e) Why doesn't all that pressure squash you? f) Air pressure can tell us about what kind of weather to expect as well. If a high pressure system is on its way, often you can expect: g) If a low pressure system is coming, then look for:

Go to “The Mercurial Barometer” at http://kids.earth.nasa.gov/archive/air_pressure/barometer.html Answer the following questions. Make your answers bold.

h) Air pressure is measured by observing the height of the column of: i) At sea level, air pressure will push on the mercury at the open end and support a column of mercury about: j) If you used water instead of mercury, you would need a glass tube over: k) As atmospheric pressure increases, the mercury is: l) When the atmospheric pressure decreases, the mercury flows:

Use the barometer on the page to answer the following questions (move your mouse over the lines on the barometer.)

m) What kind of weather should you expect at 900mb? n) What kind of weather should you expect at 920mb? o) What kind of weather should you expect at 940mb? p) What kind of weather should you expect at 960mb? q) What kind of weather should you expect at 980mb? r) What kind of weather should you expect at 1000mb? s) Using the above results, you can conclude that higher pressure results in what type of weather?

Go to “It’s a Breeze” at http://kids.earth.nasa.gov/archive/air_pressure/. Answer the following questions. t) Why do your ears pop?

Ride a Balloon 10,000 Meters - http://kids.earth.nasa.gov/archive/air_pressure/balloon.html u) When will an air balloon burst?

Air Travellers http://www.omsi.edu/visit/physics/air/science/pressure/ v) Pressure is: w) When an object is surrounded by a gas or liquid: x) If the diver drops deeper in the water: Click on “More Science” at the bottom of the page. y) The pressure of a gas or liquid can be increased by: z) When the volume of an ideal gas is decreased to half its original size:

THAT IS THE END OF THIS ASSIGNMENT! CONGRATS!