Transcript winds_notes

Winds
What causes
winds?
What changes
air pressure?
 Difference in air pressure
 Horizontal movement of air
 High pressure moves to low
pressure
 Unequal heating off air
 Warmer expands = less dense
= less air pressure
 Cooler expands = more dense
= higher air pressure
How is wind
measured?
 Direction – wind vane
 Named for where they come from.
Ex. Blows south comes from north
 Measured with anemometer
 Wind turns cups
What is the
wind-chill
factor?
 Cooling effect from wind
 Stronger wind = cooler the feeling
What are
local winds?
 Unequal heating of air in small
area
 Often occurs where land is by
large body of water.
Land Breeze – Nighttime
Draw this picture then take notes
1. Land cools faster than water – cools air above  cool air move out to
sea pushes warm air up
2. Water stays warmer than land – air stays warmer  warm air rises
Sea Breeze – Daytime
Draw this picture then take notes
1. Water is warms slower than land – cooler air above  cool air
moves towards land pushes warm air up.
2. Land warms faster than water – warm air rises  pushes warm air
up
Just a different picture for you to look at!!
NOTICE!!
Sea Breeze
Wind comes
from the sea
Land Breeze
Wind comes
from the land
Other Local Winds
Draw pictures then take notes
Daytime
Air warms  rises
breeze up the mt.
Nighttime
Air cools  sinks
breeze down the
mountain
What is a
monsoon?
 South and Southeast Asia
 A large Sea Breeze in the
summer
Literacy
Do Now: 3/21
1. Open a Science Text Book to page 758.
Today
~ Read pages 754 out loud in class
~ Complete the Observation and Inference
worksheet – will be collected today.
When you finish the worksheet you may read quietly
or work on homework.
HW: I did not leave the quiz – it will be Monday so,
study the scientific method, observation and
inference definitions