Download The Four Seasons

The Four
Seasons
Spring
• the sun shines more
• baby animal
• plants and trees wake
up
• spring showers
Summer
• Long, hot days.
• fruit and vegetables
• bees and butterflies fly
flower to flower.
Fall
• leaves
• rain
• animals get ready for
winter
Winter
• winter is cold
• People dress warmly
• animals
Weather
Temperature
•
•°F (Fahrenheit)
•°C (Celsius)
Relative Humidity
• The relative humidity tells us how “full” the
air is at the time of measurement.
• For example, 90% relative humidity means
that at that moment the air is holding 90% of
the maximum amount of water it could.
Cloud Cover Symbols
High and Low Pressure Areas
• High pressure
causes air to sink
• Usually results in
several days of clear
sunny skies
• Air rises in low
pressure areas and
forms water
droplets
• Usually results in
rain and storms
Air Masses
There are two types of air masses:
1. Continental Polar air masses
2. Maritime Tropical air masses
Fronts
A front is the boundary separating air masses
of different densities
 Fronts extend both vertically and
horizontally in the atmosphere