Local Wind
What causes wind?
Unequal heating of the Earth's surface.
The air at the _________ rises because it heats up and then travels north where it cools and sinks.
equator
What do we call a stream of water that flows in the oceans?
current
What is the state of the atmosphere at a specific time and place?
weather
A barometer measures ____________-
air pressure
The apparent curving of the global winds due to the Earth's rotation is called the
Coriolis Effect
The _____ are responsible for the movement of much of the weather across the United States and Canada, blowing from the west to the east.
prevailing westerlies
Benjamin Franklin discovered that the water below the ocean's surface is colder than the water on the ocean's surface. What is the reason for this?
cold water is more dense than warm water
The amount (percentage) of water vapor present in the air at a certain temperature is called
humidity
The weather instrument shown in the picture is a(n) ______, which measures _______.
wind vane, wind direction
In the figure below, what type of air pressure is over the water?
high pressure
Cold air is more dense so it take up more space than warm air; therefore, it has ______ pressure.
higher
What is the name of the warm ocean current that impacts Eastern USA?
Gulf Stream
When the humidity in the air is 100% what occurs?
condensation (clouds, fog, dew)
Which instrument could tell you that conditions are right for flying a kite?
anemometer
At night during a land breeze, what type of pressure is over the water?
low pressure
Which wind belt located near the equator moves tropical weather systems, such as hurricanes?
trade winds
What is the name of the ocean current bringing cold water down along the coast of California?
California Current
Name 4 factors of weather.
temperature, wind, air pressure, humidity, precipitation, clouds
Tommy is trying to decide is he needs to wear a jacket to the park today. What weather instrument would be most helpful for him to make this decision?
thermometer
Why does the cool air over the water move towards the land where the warm air is rising?
the ocean is colder and has high pressure and moves towards the warm land that has low pressure
The narrow belt of strong winds that blows near the top of the troposphere, and it helps move weather across the United States is the _______.
jet stream
Where do cold currents originate from (come from)?
the poles
High pressure = what type of weather?
Low pressure = what type of weather?
happy highs (clear, dry)
lame lows (rain, storms)
If laundry that was hung outside to dry is still damp after several hours, what is most likely the explanation?
high humidity