UNIT 4 LESSON 4
SEVERE WEATHER AND WEATHER SAFETY (PGS. 195-207)
Take Cover (PGS. 196, 197)
What do we know about thunderstorms?
1.___________________________________ is an intense
local storm that forms strong winds, heavy rain,
lightning, thunder and sometimes hail. It comes from a
cumulonimbus cloud.
2. The three steps to the formation of a thunderstorm:
a. ___________________________ air rising and
Thunder is a result of rapidly expanding air.
1._______________________________ is the sound
created by the rapid expansion of air along a
lightning streak.
How far away is the lightning? For every 3 seconds
between lightning and its thunder, add about 1 km
to the lightning’s distance.
Plan Ahead! (PGS. 198-199)
________________________into a cumulus cloud
What do we know about hurricanes?
b. __________________ particles form and begin to fall
when they are large enough. When they
1._____________________________ is a tropical lowpressure system with winds blowing at speeds of
119km/h (74mph).
fall as ________________________ they bring cold air
with them.
2. Hurricanes can also be called ___________________
c. The storm ___________________ down and ends.
Thunderstorms usually last around 30 min.
and ___________________________________.
Hurricanes need warm water to form and grow.
3. Hurricanes feed off of warm, moist air. They begin
near the equator and are carried toward land by
ocean currents.
4. When the hurricane hits land it slows and
weakens.
5. Hurricanes are rated on the Saphir-Simpson scale.
They range from category 1 to category 5. The
ranges are by wind speed.
Hurricane Sandy damage
Lightning is a discharge of electrical energy.
1.___________________________ is an electrical
discharge that happens between a positively
charged area and a negatively charged area.
Hurricanes can cause extensive damage.
1._________________________ ________________________
is a huge dome of ocean water pushed in front of the
hurricane winds.
2. Storm surge can be the most _____________________
and _______________________________ part of
hurricane.
Hurricane Sandy storm surge heights
Be Prepared (pgs. 202, 203)
What can people do to prepare for severe
weather?
1. List 6 effects of severe weather
1.
2.
3.
4.
Secure Loose Objects (PGS. 200, 201)
What do we know about tornadoes?
1. __________________________________ is a
destructive, rotating column of air that ahs very
high wind speeds and that is sometimes in a funnel
shape.
5.
6.
2. What 3 things can people do to keep safe? (pg.
202)
1.
2. A tornado forms when _______________________
air rising begins to ______________________________.
2.
3. When the “funnel cloud” reaches the ground it is
a tornado.
4. Tornadoes are ranked by the Fujita scale. They
range from F-0 to F-5 by their wind speed.
3.
3. Where should you go to be safe during a
tornado?
4. What should you do to stay safe during a
hurricane?
Use Sun Sense! (pgs. 204, 205)
USE SUNSCREEN!!!
DRINK PLENTY OF WATER!!!