Daily and Seasonal Weather Changes

Lesson 22

What is weather?

Weather is the condition of the outside air or temperature at a

particular time or place.

Weather is always changing.

How do meteorologists forecast the weather?

Weather forecasting is a prediction of what the weather will be like in an hour, tomorrow, or next week.

Weather forecasting involves a combination of computer models, observations, and a knowledge of

trends and patterns.

By using these methods, reasonably accurate forecasts can be made up

to seven days in advance.

Weather can change from day to day, and can change hourly in

some instances.

Many factors are measured to describe and predict weather

conditions.

The Elements which effect weather are:

Air temperature Air pressure

Humidity Wind

Clouds or fog Precipitation

Meteorologist will measure these elements to determine what

weather we will have.

What are some basic weather instruments used to measure

weather?

https://www.youtube.com/watch?v=Acp2AWpB93w

Let’s learn about some of the weather tools meteorologist use.

A Thermometer measures

air temperature

.

An anemometer measures wind speed. One type is made of cups

that catch the wind.

As wind blows the cups, they spin. The dial on the

anemometer shows the

wind speed.

A barometer measures air pressure. It tells whether the pressure is rising or falling.

Rising pressure (high pressure) means it will be sunny and dry. Falling pressure (low pressure)

means there will be precipitation.

Rain gauge measures how much rain has fallen over a period of

time.

A weather vane lets you know the direction of the

wind.

Is weather and climate the same thing?

No. Climate is the weather of a particular area over a long period of time, not just a particular day.

There are different climate zones all over the world.

The main differences between different climate zones is

precipitation and temperature.

Those two things make the plant and animal life of that particular

climate different.

Climate is the overall weather pattern of those two elements

over time.

Weather changes day to day, but climate deals with the big picture.

Watching the weather changes day to day gives us clues to the

future.

By collecting and comparing daily weather data you can

begin to predict the likelihood of

a particular weather condition occurring.

Why don’t you try recording the weather in your

area. Keep records of the air

temperature, types of clouds,

types of precipitation and if the wind was strong or light

each day.

Make a weather chart and keep recording your

observations for a month. Do you

see any patterns in the weather?

If you recorded your observations over a year you would start to see

trends. You would see how the seasons effect the weather.

Weather is always changing, which makes weather a fun subject to

study.

Let’s review what we have learned about weather.

Answer the attached

questions on the worksheet entitled

L#22 Daily and seasonal weather

changes.

In our next

lesson we will learn about

pressure systems

and fronts.

Good Job Today!

And remember to….

See you next time!