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Water Cycle Prezi
Transcript of Water Cycle Prezi
The continuous movement of water from water sources into the air, onto and over land, into the ground, and back to the water sources.
What are the steps?
Occurs when rain, snow, sleet, or hail falls from the clouds onto the Earth’s surface.
It is the primary connection in the water cycle that provides for the delivery of atmospheric water to the Earth.
Most precipitation falls as rain.
The downward movement of water from the land surface into soil or porous rock.
Water can be filtered and cleaned as it passes through the soil or rock.
Is water, usually from precipitation, that flows across land and collects in rivers, streams, and eventually the ocean.
The process by which plants release water vapor into the air through their leaves.
Transpiration accounts for approximately 10% of all evaporating water.
Occurs when liquid water changes into water vapor.
Approximately 80% of all evaporation is from the oceans.
Evaporation is more intense in the presence of warmer temperatures.
Occurs when water vapor cools and changes back into liquid droplets.
This is how clouds form.
The dew point is the temperature to which air must cool to be completely saturated.
Water vapor needs a place to condense on, like grass or a glass
Relative Humidity: is the amount of moisture the air contains compared with the maximum amount it can hold at a particular temperature.
When air holds all of the water it can at a given temperature it is said to be saturated.
The higher temperature, the more water the air can hold.
How to calculate relative humidity:
Actual water in the air / Maximum water the air can hold at that temperature x 100 = relative humidity
Suppose that 1 m³ of air at a certain temperature can hold 24 g of water vapor. However, you know that the air actually contains 18 g of water vapor. Calculate the relative humidity.
Example: 18 / 24 x 100 = 75%
Watch the NOAA Water Cycle Video:
Relative Humidity vs Dew Point video
Watch this video comparing relative humidity to the dew point:
The End :)
You can add the prefix/suffix of precipitation and altitude to the cloud type to classify the clouds more specifically.
Cumulonimbus – thunderstorm producing cumulus cloud
Altostratus – a middle level stratus cloud
We classify clouds not only by type (cumulus, stratus, cirrus) but also by precipitation and altitude.
Precipitation (can be prefix or suffix)
Nimbus/Nimbo means that precipitation might fall from the cloud.
Altitude (these are all prefixes)
Strato – low clouds
Alto – middle clouds
Cirro – high clouds
Classification of clouds
Why do clouds float?
The cloud is less dense than the air around it.
Even though clouds have tons of water, that is spread out over a large area.
Why do clouds turn gray?
If the clouds get thick enough or high enough all the light above does not make it through, hence the gray or dark look.
Cumulus – fluffy
Stratus – cover/layers
Cirrus - feathery
3 Main Types of clouds
It is a collection of millions of tiny water droplets or ice crystals.
As water vapor rises and cools, it becomes saturated (full).
It then condenses onto tiny dust or smoke particles as water droplet or ice. When there are millions of these, a cloud forms
What is a cloud?
Cirrostratus – a high level stratus cloud
Stratocumulus – a low level cumulus cloud
Nimbostratus – light rain producing stratus cloud
Thin and feathery
May indicate bad weather is coming.
Cirrus: Latin word for a tuft or curl of hair.
Form in layers
Cover large areas
Lower altitude clouds
Stratus: Latin word that means "to spread out in layers."
Puffy white clouds
Usually fair weather clouds
Cumulus: Latin word for a heap or a pile
Why are clouds white?
Clouds are white because they reflect the light of the sun.
Clouds reflect all the colors the exact same amount so they look white.
Precipitation Producing clouds
Watch this video on clouds and cloud formation:
this Study Jams slide show on clouds. When you are done,
take the test
Write your score
on the last page of your study guide: