Weather - Day 2 Observable Weather Conditions

Weather Day 2 - Observable Weather Conditions

SC.5.E.7.3: Recognize how air temperature, barometric pressure, humidity, wind speed and direction, and precipitation determine the weather in a particular place and time.

Multiple Choice

According to the weather reports, where is a thunderstorm most likely happening?

• Tallahassee

• Tampa

• Orlando

• Miami

​Observable Weather Conditions

​I. Air temperature is the temperature of the air.

• Temperatures between 70° and 75° Fahrenheit are called “room temperature.”

• Air temperature is a very important factor of the weather​

• 32 degrees Fahrenheit is the freezing point​

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Multiple Choice

What temperature is BELOW FREEZING?

• below 80 degrees Fahrenheit

• below 32 degrees Celsius

• below 32 degrees Fahrenheit

• below 80 degrees Celsius

​II. Barometric pressure is the pressure, or weight, of the atmosphere in a particular place.

• There are two kinds of air pressure to be familiar with:

1. High pressure means clear, sunny skies.

• ​Don't move much

2. Low pressure means stormy weather.

• move around more​

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• ​Three conditions effect air pressure.

1. Water vapor makes the air moist. Moister air has a lower air pressure—drier air has higher air pressure

2. Temperature- when air gets warmer the pressure goes down and when it gets colder the pressure goes up

3. Altitude- air pressure goes down at higher altitudes because the air is thinner

​Rising air pressure means clearer weather is coming. Falling air pressure means unsettled or wet weather is coming.

Multiple Choice

Moister air has a _______ air pressure

• higher

• lower

• serious

• lack of

Multiple Choice

When it gets colder the pressure goes _________.

• everywhere

• nowhere

• down

• up

Multiple Choice

Areas of high pressure tend ____________.

• to move quite a bit

• not to move very much.

• to go away quickly

• to be rare

Multiple Choice

Rising air pressure means ________ weather is coming

• clearer

• unsettled

• wet

• stormy

Multiple Choice

___________ tend to move around more.

• High Pressure Systems

• Low Pressure Systems

​III. Humidity is the amount of water vapor in the air.

• Humidity is measured using a hygrometer.

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​The humidity in an air conditioned room is usually between 50% and 60%. When you go outside during the summer, the humidity in Florida is much higher. Florida is surrounded on three sides by ocean water, and that warm, moist air from the ocean is felt on your skin as humidity. At 100% humidity, the air can’t hold any more water vapor, and water vapor will begin to condense onto all surfaces like plants, houses, cars... even you. This often happens at night as dew.

Multiple Choice

At 100% humidity, the air can’t hold any more water vapor, and water vapor will begin to condense onto all surfaces like plants, houses, cars... even you. This often happens at night as ___________.

• rain

• snow

• dew

• water vapor

​I. Wind speed is measured using a tool called an anemometer.

• The wind speed is recorded in miles per hour.

• Wind direction is the direction the wind is blowing from.

  • A WIND VANE measures wind direction​

• Wind occurs because of changes in air pressure!​

​If it is early morning and the wind is blowing toward you from the direction of the rising Sun, the wind direction is east. The wind is coming from the east.

Multiple Choice

Wind _______ is measured using a tool called an anemometer.

• direction

• speed

• force

• movement

​Each of these factors help us to describe the weather in a particular place and time. Temperature, pressure, humidity, wind speed and direction, and precipitation are all observable weather conditions.

Multiple Choice

A student made weather observations and recorded them on the whiteboard at the front of the classroom. The first observation that she listed on the board was made using an anemometer. Which weather factor did she measure using an anemometer?

• temperature

• wind speed

• humidity

• air pressure

Multiple Choice

What does a barometer measure?

• air pressure

• temperature

• wind speed

Multiple Choice

Air pressure is _

• The weight of the air below us.

• The weight of the air above us.

Multiple Choice

_ areas have clear weather.

• Low-pressure

• High-pressure

Multiple Choice

When you increase your altitude, the air pressure 

• increases
• decreases
• stays the same

Multiple Choice

Winds are caused by differences in

• precipitation
• humidity
• air pressure
• turbulence

Multiple Choice

Clouds are made up of tiny drops of ______ or ice. The moisture in the cloud affects the weather.

• dust
• water
• cloud particles
• precipitation