Slide 2:
Compasses -They tell you the direction you’re going or the direction you need to go like on a map.
-It is also called Mariner Compass.
-The directions on a compass are North, South, East and West.
-An early form of the compass was invented in china around 1044.
-The familiar mariner's compass was invented in Europe around 1190, from whence later originated the liquid magnetic compass.
-The red sundial always points North.
-You can also get North-West, North-East, South-West, and South-East by combining two directions.
Slide 3:
Barometer -A Barometer is used to measure atmospheric pressure.
- It can measure the pressure exerted by the atmosphere by using water, air, or mercury.
-Some types of Barometers are water-based, Mercury, Barographs and Aneroid.
-A barometer is commonly used for weather prediction, as high air pressure in a region indicates fair weather while low pressure indicates that storms are more likely.
-The first barometer is thought to have been built unintentionally by Gasparo Berti, sometime between 1640 and 1643.
Slide 4:
-Evangelista Torricelli, who is generally credited with inventing the barometer, went on to build the first instrument with mercury in 1643. One more thing on Barometers!
Slide 5:
and now... Answer some questions to help learn even more!!!
Slide 6:
What does a Barometer tell you? A. Tempature C. Atmospheric Pressure B. Whether there will
be a tornado
Slide 7:
C
Slide 8:
What does a Compass tell you? A. Tempature C. Wind Speed B. Direction
Slide 9:
B
Slide 10:
Thanks for watching!!!