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Transcript
The major cause of rain production is moisture moving along three-dimensional zones of temperature and moisture contrasts known as weather fronts. If enough moisture and upward motion is present, precipitation falls from convective clouds
(those with strong upward vertical motion)
such as cumulonimbus
(thunder clouds)
which can organize into narrow rain bands.
A drizzling Prezi
made by :-
Nivedita Sai
Niveditha sakthivel
Mansi tyagi
Rain
- In dry, hot places, rain sometimes evaporates before it hits the ground. Environmentalist Edward Abbey describes "phantom rain" this way: "You see curtains of rain dangling in the sky while the living things wither below for want of water. Torture by tantalizing, hope without fulfillment. Then the clouds dissipate into nothingness."
A little cloud weighs about the same as 100 elephants, and a thunderstorm cloud can weigh as much as 200,000 elephants!
On Venus, and other moons and planets, rain is made of sulfuric acid or methane. Even stranger: on a planet 5,000 light years away, scientists found raindrops made of iron rather than water.
Facts on Rain
- One droplet of rain stays in Earth’s atmosphere for about 10 days.
- Rain isn’t a teardrop shape, it’s actually ovular.
In one glass of water, there are about 8,000,000,000,000,000,000,000,000 (8 septillion water molecules.)
In a one hundred year period, a water molecule spends 98 years in the ocean, 20 months as ice, about 2 weeks in lakes and rivers, and less than a week.
- Rain starts off as ice or snow crystals at cloud level.
- Heavy rain is classified as being more then 0.30 inches (7.61mm) of rain an hour.
- In some deserts, rain is so uncommon that the natives to not have a word for it.
Rain as a resource
Action Checklist
Rain is liquid in the form
of droplets that have condensed from atmospheric water vapor
and then precipitated -
that is become heavy
enough to fall under gravity
- Collect rain runoff from your roof in a rain barrel or cistern.
- Create swales (low areas) or terraces to catch, hold, and filter stormwater.
- Where possible, direct downspouts and gutters to drain onto a well-drained area in the lawn or plant beds where rain will soak into the soil rather than run off the yard.