water cycle presented by darlene devendorf ocmboces science center graphic: (texas a&m univ)
TRANSCRIPT
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Water Cycle
Presented by Darlene DevendorfOCMBOCES Science Center
Graphic: http://water.tamu.edu/index.html (Texas A&M Univ)
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Where Is Water? p.13
Where is water in our world?
Is water always liquid in our world?
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Where is water in NYS?
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Where is water in the USA?
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Where is water in the USA?
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Where is water in N. America?
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Where is water in the world?
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Google Maps or EarthInstall Google Earth 3-D Plugin
Google Maps - Baldwinsville
Google Earth 5
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Is water always liquid in our world?
My Name
Can I change the state of this liquid to a solid? How?
6 oz. Paper cupOr
1 oz. plastic cup
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Where Is Water – Session 2Bring in cups from freezer.
Water freezes to a solid at 32 °F.Solid water or ice floats in liquid water.Solid water is found on solid ground and floating on ponds, lakes, oceans …
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Water Chart
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Water in Soil p. 23Where else can water be found on Earth?
DEMO:Sponge
Water in 1-pint container
Compare the sponge before and after it is placed in water. Where is the water now?
absorbed
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Water in soil.SOIL
6-oz. cup
8 oz. cup
1. Poke holes in the bottom of 6 oz. cup with a pencil (4 – 5)
2. Place soil in 6 oz. cup3. Observe soil properties4. Place 150 cc of water in grad.
Tumbler5. Hold 6 oz. cup with soil over
the 8 oz. cup. Pour 150 cc into the soil.
6. Observe water movement.7. When water has stopped
moving, measure the amount of water in the 8 oz. cup.
Where else on Earth is there water? How does it get into the soil?
measure the mass
(how much matter there is)
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Water Chart p. 27
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Water in Plants p. 31Bridge: Review where we have located water in our world so far. Ask, “Where else in our world may there be liquid water stored?
Students are going to use their powers of inference and reasoning to explore the presence of water in plants. They will do this by:
1.Placing cut pieces of fruits and /or vegetables on to a sheet of white paper. Outlining the pieces on the paper.* Don’t forget the piece of dry sponge.2.Making observations over a few days as to any changes in the shape or size of the pieces.3.Making inferences in order to draw a conclusion as to why any changes occur.
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How can we infer that there is water in plants?Is there water in other living things, like people?
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Water Chart p. 35
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Bridge: Where did the water go when we dried out the fruits/vegetables?
(Assess class for knowledge of terms: gas, water vapor, evaporate, change state)Apply: What would happen to the water in a towel that we hug to dry out?
What would happen to the water in glass that we left out on a counter?
Each team of students: (Pair – square?)2 thermometers2 plain tumblersMasking tape (for labeling)
For class: Room temperature waterLight source
Place one in lighted place. Place one in dark(er) place.
Evaporating Water p.39What do we call the process where a liquid changes to a gas?
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Evaporating Water p. 39
KEY CONCEPT: Energy is needed for water to change state from a liquid to a gas, increasing the energy powers more liquid water to go to the gas state --- leading to:“The Sun’s energy drives the evaporation part of the water cycle.”
Temperature: measures the amount of energy , at room temp. there is a level of energy as measured by the temperature.
Each team of students: (Pair – square?)2 thermometers2 plain tumblersMasking tape (for labeling)
For class: Room temperature waterLight source
Place one in lighted place. Place one in dark(er) place.
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Evaporating Water p. 39
Temperature: measures the amount of energy , at room temp. there is a level of energy as measured by the temperature.
Each team of students: (Pair – square?)2 thermometers2 plain tumblersMasking tape (for labeling)
For class: Room temperature waterLight source
Place one in lighted place. Place one in dark(er) place.
KEY CONCEPT: Energy is needed for water to change state from a liquid to a gas, increasing the energy powers more liquid water to go to the gas state --- leading to:“The Sun’s energy drives the evaporation part of the water cycle.”
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Puddle Watching p.45Observe a puddle after a rainfall or create a puddle to observe. Observe one or two that are in different places.
Outline the puddle each day. Take a digital picture? Make a prediction.
What is the temperature like near the puddle? Are the days sunny or cloudy? Is the puddle in the sun or in the shade?
Compare the puddle from Day 1 to Day 5. Compare the two puddles.
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Water Chart p. 49
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More Water Into The AirWhere else in the world does evaporation occur besides from
standing water?
Bridge from previous activities esp. Act. 3 and 4 -Potted plant (not recently watered): Look at soil around plant, add some water to soil, discuss where the water goes when poured into the soil.
Give each team of students a sheet of white paper, small 1-oz. plastic cup of water and tumbler of potting soil.
Have the students moisten the soil with the water (add more if needed).
Write names on white paper and dump the soil onto the paper. Spread the soil out.
Place the samples under a light source (and some not in the light?). Observe the soil the next day.
Think about: Where are you going to place the soil samples?Do this on a Friday afternoon?
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More Water Into The AirWhere else in the world does evaporation occur besides from
standing water?
This next part can be done with an indoor plants or with outdoor plants, shrubs, trees…
Are there a variety of classroom, offices … around that school that have plants? (This activity should not harm the plant.)
Placing the plant in a sunny window or under a light will help the process.
How did the water get into the bag?
Can we infer that it came from the plant? Yes
There are droplets of liquid, is the plant leaking liquid water?No, water is evaporating from the plant into the air in the bag.
Think about it. (Bridge to Act. 8)
When you see water on the inside of a window or the outside of a glass, where did it come from?Hmmm, let’s find out.
Transpiration = evaporation of water from plants
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More Water Into The AirWhere else in the world does evaporation occur besides from
standing water?
This next part can be done with an indoor plants or with outdoor plants, shrubs, trees…
Are there a variety of classroom, offices … around that school that have plants? (This activity should not harm the plant.)
Placing the plant in a sunny window or under a light will help the process.
How did the water get into the bag?
Can we infer that it came from the plant? Yes
There are droplets of liquid, is the plant leaking liquid water?No, water is evaporating from the plant into the air in the bag.
Think about it. (Bridge to Act. 8)
When you see water on the inside of a window or the outside of a glass, where did it come from?Hmmm, let’s find out.
Transpiration = evaporation of water from plants
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Water Chart p. 58
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Condensing Water p.69What do we call the process where a gas changes to a liquid?
Each team of students:2 Plain tumblersGraduated tumblerRed colored ice waterVery warm tap water
1. Observe empty dry tumbler (answer qu. 1)2. Put very cold (red) ice water into tumbler3. Make observations (answer qu. 2 – 5)4. *Modification: Fill second tumbler with very
warm water, pour cold water out of the first tumbler into the graduated tumbler and then pour the warm water in. Answer qu. 6.
Where else in the world does this occur? Relate to previous plant activity.
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Water Chart p. 74
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A Model Cloud p. 77What process causes clouds to form?
Steps:
1.Fill a tumbler with warm water, let it stand for several minutes.2.Place ice on the lid. Pour MOST of the water out of the tumbler. Place the lid on top. 3.Open the lid a crack, enough to drop in a lit match.4.Place the black paper behind the tumbler and make your observations.
Each team of students:TumblerLidWarm waterGraduated tumblerIceBlack paper rectangle
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Water Chart p. 81
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A Terrarium p. 91Where can water be found in a terrarium?How might water move within the terrarium?How does this compare to the natural world?
Watersheds?
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Summing Up the Water Cycle
precipitation
run off & ground water
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Evaporating and Condensing p. 99
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The Water Cycle p. 107
Alaska Mts.
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Applying the Water Cycle ConceptsGrand Tetons, WY
Mount Marcy, NY
Evaporation off a lake
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The Water Cycle
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Notes
• Act. 7 – Set up container with cobalt paper.• Act. 8 – Condensing water (distribute warm
water while teachers are doing condensation activity.