Transcript Weather - Denton ISD

TEKS 5.8A: Differentiate between weather and climate.
What is weather?
• Weather is all the conditions of Earth’s atmosphere at one time
and place.
• The atmosphere is the layer of gases that surrounds Earth.
• Four factors make up the weather in a place:
• Temperature
• Precipitation
• Air pressure
• Wind
(contd.)
TEKS 5.8A: Differentiate between weather and climate.
• In some places, the temperature stays almost the same. In other
places, it can change quickly.
• Precipitation is water that falls from clouds. Rain, snow, sleet,
and hail are all kinds of precipitation.
1. Identify Give an example of precipitation you
have seen at your home.
(contd.)
TEKS 5.8A: Differentiate between weather and climate.
• Air is made up of tiny particles. These particles have mass and
weight. When they press against another object, they cause air
pressure.
• The more air there is above you, the greater the air pressure.
The higher you go, the less air pressure there is.
Air pressure is
sometimes measured
in inches of mercury.
This diagram shows
how air pressure
drops as you go
higher.
(contd.)
TEKS 5.8A: Differentiate between weather and climate.
• Air that moves across Earth’s surface is called wind.
Differences in air pressure and temperature cause air to move.
• Hot air causes less pressure than cooler air. Lower-pressure air
rises. Higher-pressure air flows in under it.
2. Relate Cause and Effect Explain how air pressure and wind are related.
TEKS 5.8A: Differentiate between weather and climate.
What is climate?
• Climate is the average of weather conditions in a place over a
long time. Climate changes much less than weather.
• Latitude affects climate. Places near the equator are usually
warmer than places far from the equator. This happens because
the energy from the sun is more direct near the equator.
Near the equator,
energy from the sun
strikes Earth most
directly. Near the poles,
the same amount of
energy spreads out
over a larger area.
(contd.)
TEKS 5.8A: Differentiate between weather and climate.
• Landforms affect climate. Mountains are usually cooler than the
areas around them.
• Mountains can affect the amount of precipitation an area
receives.
(contd.)
TEKS 5.8A: Differentiate between weather and climate.
• Oceans affect climate. Water heats up and cools down more
slowly than land. The temperature of the air near an ocean does
not change as much as the air farther inland.
• Ocean currents affect
climate. Warm currents
make the air and climate
near a place warmer.
Cold currents make the
air and climate colder.
3. Differentiate Explain how knowing today’s weather forecast for your town is different from
knowing its climate.