Water Cycle Key Stage 2 Science Homework

The water cycle is an amazing process and we touched on it when discussing evaporation a couple of weeks ago.

Today we are going to have a go a creating our very own Mini water cycle.

It shows how evaporation occurs, where condensation occurs and precipitation (rain). It is so simple and very clever.

As a reminder of the water cycle I have included a diagram for you that you can print out, label and colour if you wish.

Water Cycle Sheet

The arrow from the se to the sun – evaporation

The arrow from the sun to the clouds – condensation

The arrow from the Clouds to the mountains – precipitation

Now to make your water cycle – you will need:

A plastic bowl (mixing bowl size)

Cling film

A mug

String

Water

It is best to do this outside in a sunny place.

1. Place the mug in the bottom of the bowl

2. Add water around the mug so that it come up to 2/3rd of the mug – if you can draw on the bowl mark where the water level is.

3. Cover the bowl tightly in clingfilm and fasten in place with the string.

4. Watch what happens!

The science Bit

You should find that you can see condensation drops of water on the top of the cling film and that the water level have lowered proving that evaporation has taken place. The condensation droplets are the clouds. They will be dripping back into the bowl but you should find that some of the water is now in the cup (your mountains) demonstrating precipitation!

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[in Spanish]

KidZone Science
The Water Cycle

© Contributed by Leanne Guenther

Run and get a glass of water and put it on the table next to you.  Take a good long look at the water.  Now -- can you guess how old it is?

The water in your glass may have fallen from the sky as rain just last week, but the water itself has been around pretty much as long as the earth has!

When the first fish crawled out of the ocean onto the land, your glass of water was part of that ocean.  When the Brontosaurus walked through lakes feeding on  plants, your glass of water was part of those lakes.  When kings and princesses, knights and squires took a drink from their wells, your glass of water was part of those wells.

And you thought your parents were OLD

The earth has a limited amount of water.  That water keeps going around and around and around and around and (well, you get the idea) in what we call the "Water Cycle".

This cycle is made up of a few main parts:

• evaporation (and transpiration)
• condensation
• precipitation
• collection

Evaporation is when the sun heats up water in rivers or lakes or the ocean and turns it into vapor or steam. The water vapor or steam leaves the river, lake or ocean and goes into the air.

Do plants sweat?

Well, sort of....  People perspire (sweat) and plants transpire.  Transpiration is the process by which plants lose water out of their leaves.  Transpiration gives evaporation a bit of a hand in getting the water vapor back up into the air.

Water vapor in the air gets cold and changes back into liquid, forming clouds. This is called condensation.

You can see the same sort of thing at home...  Pour a glass of cold water on a hot day and watch what happens.  Water forms on the outside of the glass.  That water didn't somehow leak through the glass!  It actually came from the air.  Water vapor in the warm air, turns back into liquid when it touches the cold glass.

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.

When water falls back to earth as precipitation, it may fall back in the oceans, lakes or rivers or it may end up on land.  When it ends up on land, it will either soak into the earth and become part of the “ground water” that plants and animals use to drink or it may run over the soil and collect in the oceans, lakes or rivers where the cycle starts

all over again.

Water Cycle Activity Pages.

Print these out and use them as posters or coloring pages.  Sheets 2 thru 4 have some suggested activities you can do at home to demonstrate the Water Cycle.

Sheet 1  -  (color)   or   (B&W)

Sheet 2  -  (color)   or   (B&W)

Sheet 3  -  (color)   or   (B&W)

Sheet 4  -  (color)   or   (B&W)

Sheet 5  -  (color)   or   (B&W)

Check out the Spanish version of the Water Cycle >