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StandardsS 6.2d Students know
earthquakes, volcanic eruptions, landslides and floods change human and wildlife habitats
Thunderstorms Small storm with heavy precipitation and frequent
thunder and lightning
Thunderstorms form in large cumulonimbus clouds (Thunderheads)
Form in the spring and summer
Form on hot, humid days
Lightning: areas of positive and negative electrons charges build up
Thunder: lightning bolt can head the air to 30,000 *C. The headed air expands suddenly and explosively. Thunder is the sound of that explosion
Thunderstorm DamageFlood low lying areas
Ligthning strikes the ground
It can start forest fires
Creates a powerful electric shock when it strikes a human or animalUnconsciousness, serious burns, or heart failure
Floods can wash away habitats for animals and humans
Thunderstorm SafetyThe safest place is indoors
Do not touch telephones, electrical appliances or plumbing fixtures
Usually safe to stay in a car with a hard top
Electricity will flow over the car and to the ground and not touch you
Avoid: where lightning might strike, objects that conduct electrical currents and bodies of water
TornadoesRapidly whirling, funnel shaped clouds that
reaches down from a storm cloud to touch Earth’s surface
Over water it is called a waterspout
Usually brief but can be deadly
Touch the ground for 15 minutes
Wind speeds is the most intense in a tornado
Tornado FormationDevelop in thick cumulonimbus clouds- same
clouds that bring thunderstorms
Spring and early summer
800 tornadoes occur in the US every year. It is called tornado alley
Tornados occur in every state, even California!
The safest place to be during a tornado is a storm shlter or basement of a well built building
SnowstormsMost precipitation begins in clouds as snow. If
the air is colder than 0*C all the way to the ground, the precipitation falls as snow.
Occur in high elevation for California
California: depends on snow for fresh water when it melts in the spring and summer.
Imagine: being caught in a snowstorm when the wind suddenly picks up. Snow is blowing sideways and picks it up from the ground and suspends it in the air. Sound fun?
What to do?IF you are caught in a snowstorm, try to find
shelter from the wind.
Cover exposed parts of your body
Car: keep the car running as long as the exhaust pipe is clear
HurricanesA tropical cyclone that has winds of 119 kilometers per
hour or higher
Atlantic, Pacific and Indian Oceans
Begins over warm ocean water as a low pressure area or tropical disturbance
Becomes a tropical disturbance then becomes a hurricane if it worsens
At the center is a ring of clouds called the “eye” of the storm. The wind gets stronger as the eye approaches and then the weather suddenly changes. The air grows calm and the skies clear. Then it starts again.
Hurricanes Last about a week or more
They bring high waves and severe flooding and wind damage
Storm surge: dome of water from where the hurricane lands
Washing away beaches, destroying buildings, eroding coastlines
If you hear a hurricane warning and are told to evacuate, leave the area immediately.
Checking for Understanding
How can lightning be dangerous?
How can snowstorms be dangerous?
How can hurricanes be dangerous?