Friday, March 23, 2012
Competency
4c – DOK 2
8th Grade –
Lesson 8.5
Name: ____________________________________ Period: ____
Examine weather forecasting and describe how meteorologists use
atmospheric features and technology to predict the weather.
I can differentiate between cold fronts, warm fronts, and stationary
fronts. I can predict the weather in a region based on these fronts.
Page
5
Unit 8 – Weather: Fronts
Quick Review:
The following diagram shows the dominant trait of brown fur in
deer, B. The recessive allele will give deer with white fur. Use this
diagram to answer the following questions.
1. How many total males are shown? 3
2. How many females will have brown fur? 2
3. How many males will have white fur? 0
4. What is the chance that the offspring of individuals 3 and 4
in Generation II will have brown fur? 100%
5. What is the chance that the offspring will be carriers for the
white fur trait? 50%
Key Points on Fronts:
1. A large amount of air with about the same temperature and humidity = air mass
a. Covers thousands of square miles.
b. Can be warm or cool and wet or dry. Depends on where it comes from.
c. Warm air masses hold more water vapor than cold air.
1) Your skin is drier in the winter because the air is drier.
2. When two air masses with different characteristics meet = front
a. The type depends on which mass is moving more quickly and its characteristics.
b. Most changes in weather occur at fronts.
3. We will discuss three different types of fronts: cold, warm, stationary fronts
a. A fourth, called an occluded front, is less commonly seen.
4. Cold Front
a. A quickly moving cold air mass pushes under a warm air mass causing it to rise
quickly.
b. When warm air rises, it cools and water vapor condenses, forming large clouds.
Heavy rain, thunderstorms, and snowstorms happen at cold fronts.
c. As a cold front passes, the temperature decreases and weather clears.
5. Warm Front
a. A quickly moving warm air moves over a colder air mass and begins to rise.
b. The warm air mass rises slowly, forming smaller clouds which bring light rain.
c. As a warm front passes, the temperature increases and weather clears.
6. Stationary Front
a. Two air masses meet but neither is strong enough to lift the warmer air. The air
masses stop moving; they are stationary.
b. Wind and light rain will occur and can last for several days.
7. Symbols
Cold Front
Warm Front
Stationary Front
Friday, March 23, 2012
Competency
4c – DOK 2
8th Grade –
Lesson 8.5
Name: ____________________________________ Period: ____
Examine weather forecasting and describe how meteorologists use
atmospheric features and technology to predict the weather.
I can differentiate between cold fronts, warm fronts, and stationary
fronts. I can predict the weather in a region based on these fronts.
Page
5
Unit 8 – Weather: Fronts
Quick Review:
The following diagram shows the dominant trait of brown fur in
deer, B. The recessive allele will give deer with white fur. Use this
diagram to answer the following questions.
1. How many total males are shown?
2. How many females will have brown fur?
3. How many males will have white fur?
4. What is the chance that the offspring of individuals 3 and 4
in Generation II will have brown fur?
5. What is the chance that the offspring will be carriers for the
white fur trait?
Key Points on Fronts:
1. A large amount of air with about the
and
=
a. Covers
of square miles.
b. Can be
or
and
or
. Depends on where it
.
c. Warm air masses hold
than cold air.
1) Your skin is drier in the
because the air is
.
2. When two air masses with different characteristics meet =
a. The
depends on which mass is moving more
and its
.
b. Most
in weather occur at fronts.
3. We will discuss three different types of fronts:
,
,
fronts
a. A fourth, called an
front, is less commonly seen.
4.
Front
a. A quickly moving cold air mass pushes
a warm air mass causing it to
.
b. When warm air rises, it
and water vapor
, forming large
. Heavy
,
, and
happen at cold fronts.
c. As a cold front passes, the temperature
and weather
.
5.
Front
a. A quickly moving warm air moves
a colder air mass and begins to
.
b. The warm air mass rises
, forming
clouds which bring
.
c. As a warm front passes, the temperature
and weather
.
6.
Front
a. Two air masses meet but neither is
to lift the warmer air.
The air masses
; they are
.
b.
and
will occur and can last for
.
7. Symbols
Front
Front
Front
Friday, March 23, 2012
Name: ____________________________________ Period: ____
Fronts: Guided Practice
1. What are the characteristics of an air mass that forms off the coast of Alaska?
2. The temperature changes from 68° F to 63° F. What type of front has passed?
3. A meteorologist predicts that a warm front is about to pass through. Predict how the
weather will change.
4. Nashville, Tennessee is experiencing light wind with rain showers on-and-off for two days.
What type of front is over Nashville?
Fronts: Independent Practice
Answer the following questions as a scientist would. Explain WHY using COMPLETE sentences!
1. What are the characteristics of an air mass that forms over central Mexico and Texas?
2. Two different air masses are meeting. What term is used to describe the edge where they
meet?
3. A meteorologist describes a cold front. Describe what is occuring.
4. As the front in #3 moves past, how will the weather change?
5. A quickly moving warm air mass runs into a slow moving cold air mass. What type of front
is this?
6. As the front in #5 moves past, how will the weather change?
7. A slow moving warm air mass runs into a slow moving cold air mass. What type of front is
this and how will the weather change?
8. A warm air mass is always found above a cold air mass when they meet. Why?