Download File - Ms. D. Science CGPA

Weather Patterns
Table of Contents
Precipitation
6.1
Essential Question How do Meteorologist
Predict Weather?
What are the Common Types of
Precipitation?
Clouds
Cloud Types
There are many
different types of
clouds.
Vocabulary 6.2
1. Precipitation- Any form of water that falls from clouds and
reaches Earth’s surface as rain, snow, sleet, or hail.
2. Rain Gauge- An instrument used to measure precipitation
What Are the Common Types of Precipitation?
Any form of water that falls from clouds and reaches Earth’s surface is
precipitation.
Common types of precipitation include:
rain, sleet, freezing rain, snow, and hail.
Rain
Prevailing winds move air masses (water vapor)
Rain is the most common.
(They come in different sizes!!!)
• Drops of water are called rain if they are at least 0.5 millimeters
in diameter. (L)
•
Smaller drops of water are called drizzle (M)
• Even smaller ones are called mist. (S)
Precipitation
Water Droplets
Cloud droplets condense to become larger droplets.
Instrument to Measure Rain
Funnel
(10x more than a tube alone)
Measuring Rain
An open-ended can or tube that collects
rainfall is called a rain gauge.
measure by:
• Dipping ruler into the water
• or by reading a scale
• To get the actual depth, you divide by
ten.
#cm/10
Precipitation
Rain Gauge
The rain gauge, measuring in
centimeters, collects ten times
the actual depth of rain that
falls.
Freezing Precipitation
There are four types of freezing precipitation:
•
sleet
Snow
freezing rain
Hail
Freezing rain is rain that freezes when it hits a cold surface.
When clouds are colder, water vapor can convert directly into ice crystals,
forming snow.
Forms of Precipitation
Sleet
• When raindrops fall through a layer of air colder than 0°C
• they can freeze into ice particles.
• Ice particles smaller than 5 millimeters in diameter
Hailstones
• Round pellets of ice larger than 5 mm in diameter
Hail
•
•
forms only inside cumulonimbus clouds during thunderstorms.
It forms when strong updrafts repeatedly carry ice pellets
through cold regions of a cloud, adding another layer of ice
each time.
Precipitation
Freezing Precipitation
What would be the air and ground temperature ranges for each type of
precipitation?
Resources
Song
http://www.kidsknowit.com/educational-songs/play-educationalsong.php?song=Snowflake,%20Snowflake
Types of Precipitation
http://www.kidsgeo.com/geography-for-kids/0114-precipitationtypes.php
Video
http://www.youtube.com/watch?v=snsVdIVG4CI