Elementary Science

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Elementary Science

• Science Focus Lesson SC.5.E.7.1
• Water Cycle

Polk County Public Schools
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SC.5.E.7.1

• Benchmark Create a model to explain the parts of
  the water cycle. Water can be a gas, a liquid, or
  a solid and can go back and forth from one state
  to another.
• Essential Question
• What causes water to change states throughout
  the water cycle?
• Vocabulary
• evaporation water vapor
• condensation precipitation

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States of Water

• Solids have a fixed volume and shape. Their
  particles are tightly packed and vibrate but,
  they stay in place. Examples of Solid water
  include ice, snow, hail, and sleet
• Liquids have a fixed volume but their shape
  changes to fit the shape of the container they
  are in. Their particles are close together, they
  vibrate and change place. Liquid water
  examples- dew, ocean water, lake water, mist, and
  rain.

• Gases have no fixed volume or fixed shape. Their
  particles are well
• separated without order, they vibrate and move
  freely and quickly from
• place to place. Gasexamplessteam, humidity
  in air and water vapor

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What is the Water Cycle?

• The WATER CYCLE describes the continuous movement
  of water on and above the surface of the Earth.
• Water can change states among liquid, gas, and
  solid at various stages of the water cycle.
• The water that was here during the time of the
  dinosaurs is the same water that is here today.

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Click on Diagram to access Interactive Water
Cycle Web Site
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Summarizing

• Using the information that you have learned
  describe the different states of water and give
  at least one example of each.
• Using the information you learned about the water
  cycle write as many facts as you can remember
  about the cycle and the water in it.

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What is Evaporation?

• Evaporation occurs when the sun heats up water in
  rivers, lakes, puddles, ponds or the ocean and
  turns it into vapor or steam. The water vapor or
  steam leaves the river, lake, puddle, pond or
  ocean and goes into the air.
• Plants lose water out of their leaves and when
  this water evaporates it is called transpiration.

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What is Condensation?

• Water vapor in the air gets cold and changes
  back into liquid, forming clouds. This is called
  condensation.
• You see condensation anytime you have a cold
  glass of water and on a hot day, water forms on
  the outside of the glass.  The water doesnt leak
  through the glass!  The water on the outside of
  the glass comes from the air.  Water vapor in the
  warm air turns back into liquid when it touches
  the cold glass.

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What is Precipitation?

• Precipitation occurs when so much water has
  condensed that the air cannot hold it anymore. 
  The clouds get heavy and water falls back to the
  earth in the form of rain, hail, sleet or snow.
• Rain is a liquid form of precipitation
• Hail, sleet, and snow are solid forms of
  precipitation

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What is water Collection?

• When water falls to the earth as precipitation,
  it collects before it evaporates- this is
  collection.
• It may create a puddle then start the cycle over
  again quickly
• It may soak into the soil and become part of the
  ground water and aquifer be used by plants then
  evaporate to start the cycle over again
• Or it may run downhill and collect in the
  oceans, lakes, rivers or swamps where the cycle
  start up again

What is the largest water collection on Earth?
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The Oceans are the largest water collections on
Earth
97 of the water on Earth is in the ocean
75 of the Earth is covered with Water
The oceans are the source of more than 85 of
evaporation on Earth
More than ½ of all precipitation occurs over the
ocean
Because of all of these reasons the ocean is very
important to the water cycle.
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Summarizing

1. Turn to your shoulder partner.
2. Partner A explain evaporation.
3. Partner B explain condensation.
4. Partner A give an example of solid and liquid
   precipitation.
5. Partner B explain why the ocean is so important
   to the water cycle.

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Guided Practice

• Talk to your shoulder partner about the answer to
  each question. Read the question carefully and
  read all answer choices.

When the Sun heats up the puddle of water in your
backyard and turns it into water vapor, this
process is known as ________.

1. Condensation
2. Evaporation
3. Precipitation
4. Collection

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B
The answer is
Evaporation is occurring when the Sun heats up
the puddle of water in your backyard and turns it
into water vapor.

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Guided Practice
As time goes by, and water goes through the water
cycle again and again, the amount of water on
Earth _______.

1. Increases
2. Decreases
3. Stays the same
4. Goes up and down

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C
The answer is
The amount of water that is on Earth now is the
same amount that has always been here. It is
also the same water that has always been on
Earth. The water cycle just cleans the water.

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Summarizing

• Pass a piece of paper around the table. Each
  group member adds a detail that answers the
  question. Keep the paper moving
  until time is called- see how many
  ideas your group can generate!
• Essential Question
• What are the parts and function of the water
  cycle and how does water change state?

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Check Your Understanding

• Number your paper from 1-3, select the answers
  that you think are correct
• The water cycle begins with ________. a.
  Condensationb. Evaporationc. Precipitationd.
  Trick question-the water cycle has no beginning
  or end

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Check Your Understanding

• 2. When you look outside and it is raining, the
  water falling down is in what stage of the water
  cycle?a. Evaporationb. Collectionc.
  Condensationd. Precipitation

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Check Your Understanding

• 3. Why do water droplets form on your ice cold
  glass of water?
• a. Your glass is leaking
• b. Evaporation occurred
• c. Precipitation occurred
• d. Condensation occurred

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Check Your Answers

• D
• D
• D

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Summary Question

• In your science journal explain what causes the
  water to change states throughout the water cycle.