When we want to know what kind of weather we are having we just go to our phones and find the weather channel. In the old days, following the weather was a bit more fun. They used barometers. My grandparents owned a barometer like this. Every morning I would watch my grandfather thunk the glass and he would turn and tell us that it "looks like a great day for going to the beach" or he would turn around and say, " oh? Looks like rain today, guess we get to stay inside and read". Should have heard my sisters and I groan at that forecast! Barometers measure atmospheric pressure... Atmospheric pressure and barometric pressure is simply the weight of air at ground level. Mr Torricelli discovered that air has weight. If there is more air above you the pressure is greater on you! If you go higher up on a mountain or in an airplane, the air above you is less and there is less pressure on top of you! So...what does barometric pressure or atmospheric pressure have to do with weather? On the weather map we see a large "H" and a large "L". These symbols show where there are massive amounts of air, the H is for high pressure air mass and the L is for low pressure air mass. These masses of air can be hundreds of miles wide. High pressure masses show vertical down drafts of air. The air is cooled and it is dropping down to the ground. When the air warms up again it rises and those air masses show lower pressure as they lift off the ground. When they lift, the air usually condenses and then precipitates bringing rainy weather. These High and Low pressure masses move across the Earth due to winds, the rotation of the Earth and the angle of the Earth compared to its place in space as it revolves around the Sun. That kind of complicates things and weather forecasters try to predict weather the best they can, and using a barometer helps out a whole bunch! Barometers have evolved over the hundreds of years they have been used. And all those years using a barometer has been very handy for those of us who care about the weather....
20 Comments
squidward
4/15/2019 12:25:09 pm
wow
Reply
Alice
4/15/2019 03:48:41 pm
I love the picture of the " IT'S THAT SIMPLE"
Reply
OLIVER ROPER
4/15/2019 04:19:09 pm
RIP in the chat for Alice and Squidward I claim the FIRST! Hahahahah Hahahahah Hahahahah Hahahahah Hahahahah Hahahahah Hahahahah Hahahahah Hahahahah Hahahahah Hahahahah Hahahahah Hahahahah Hahahahah 👌and!Hehehe
Reply
Michael Mandaa
4/15/2019 06:52:31 pm
U know I DO NOT CARE U ARE FIRST!!!!!
Reply
Zach
4/15/2019 04:33:58 pm
I claim second! Barometers are cool but I think it is easier to just look it up on your phone or computer.
Reply
Jackson Baird
4/15/2019 04:49:32 pm
It's a dogo.
Reply
danny araya
4/15/2019 04:55:07 pm
third rip jakson
Reply
nobody aka danny araya
4/15/2019 04:56:29 pm
emoji fest🥇⚽🏀🆚😘😗🧗♀️🏂🚬🍻☢🍺💣👌🤞🥅📣💫✔🐱🏍🤦♀️🙌😁😜🎶😎🤣🚓🚓🚓🚓🚐🚡🚠😊😂🕎🐱👤👩🎓🍗👍😺🎭🎞
Reply
4/15/2019 04:57:09 pm
That puppy was pretty cute, but not as cute as my puppy(toast)!!!
Reply
Michael Mandaa
4/15/2019 05:07:26 pm
I wonder who Squidward is, wink wink
Reply
Sebastian Lei
4/15/2019 05:58:59 pm
I claim fourth and that dog looked really funny.
Reply
Michael Mandaa
4/15/2019 06:36:37 pm
I anm da fifh
Reply
Maddie
4/15/2019 06:40:12 pm
I feel like barometers would be more accurate than the weather. One night I checked to see what the weather was and it said clear night. My mom then said, I think it is supposed to rain. It rained that night.
Reply
Audrey
4/15/2019 08:07:46 pm
That little pug was so cute!!
Reply
Aaron
4/15/2019 08:19:17 pm
I am sixth!!!!
Reply
4/15/2019 09:34:18 pm
i am da last, anything under this comment will be falcon punched by Arthur reed, To be saved click this arrow
Reply
Michael Mandaa
4/15/2019 09:34:57 pm
you can't be saved
Reply
Andrew
4/15/2019 09:47:10 pm
I claim 0 you yeeters meters are cool.
Reply
Michael Mandaa
4/15/2019 09:55:08 pm
u hav ben falcon punched by Arthur read. HEHEHehehehehehehe
Reply
Brailyn
4/16/2019 12:06:01 pm
The picture with the barometer is cool because it shows the water pressure and the the air pressure
Reply
Leave a Reply. |
Mrs. TaylorI love science! Everything about the world is interesting and never boring. I love to study plants, animals, insects, and people. My favorite subjects are my students who are the most unique organisms on the planet! Categories |