DO NOW!S EPTEMBER 26 1.How do you think you did on Monday’s quiz? 2.If you don’t think you did...

DO NOW!SEPTEMBER 261. How do you think you did on Monday’s quiz?2. If you don’t think you did well, what can you

do better for next time?3. If you think you did well, how will you

continue to be successful in the future?4. Do you think we have MORE or LESS water on

earth than we did when you were born? 1,000 years ago? What about 200 million years ago?

LEQ #4

• Do we have MORE or LESS water on earth than we did when the earth was formed?

Think, Pair, ShareThe glass of water you’re about to drink

Deserves a second thought, I think.For Avogadro, oceans and those you followAre all involved in every swallow.The molecules of water in a single glassIn number, at least five times, outclassThe glasses of water in stream and sea,Or wherever else that water can be.The water in you is between and betwixt,And having traversed is thoroughly mixed,So someone quenching a future thirstCould easily drink what you drank first!The water you are about to tasteNo doubt represents a bit of wasteFrom prehistoric beast and bird—A notion you may find absurd.The fountain spraying in the parkCould well spout bits of Joan of Arc,Or Adam, Eve, and all their kin;You’d be surprised where your drink has been!Just think! The water you cannot retainWill some day hence return as rain,Or be held as the purest dew.Though long ago it passed through you!

Written by Verne N. Rockcastle

What do you think this poem is telling you?

Take 2 minutes to discuss with your partner.

Get ready for your mind to be…BLOWN!

Key Point #1

• Every DROP of water on the planet has been here since its beginnings!

That means we’re drinking the same water that the dinosaurs drank!

Key Point #2

The water cycle is never ending and constantly recycling.

Key Point #3

• Water movement depends on ENERGY from the sun and gravity.

Key Point #4

• Movement occurs when the water is in VAPOR form.

Water cycle game

• You’re going to become water molecules moving through the water cycle.

• Around the room, you will see station labels and dice.

• You will see that on the station labels that there is a number attached to it.

• When it is your turn, you will roll the dice and then go to the station number that you rolled.

• In order to roll, you must first line up single file.

• When I tell you to, the first person will roll.

• If you travel to the next station as a liquid, then you will take the person behind you in line and you will move as a pair.

• If you move as a vapor, then you will move alone.

• If you roll a stay, then go to the back of the line and stay at the location.

What is the water cycle?

• In very simple terms, the water cycle is the journey that water takes from land to the sky and back again!

Let’s start with evaporation

- Evaporation is the process of water molecules changing from a liquid state to a gas state- This gas state of water is called water vapor* The sun’s heat causes evaporation

from streams, rivers and oceans

Transpiration

• Transpiration is the process of water being evaporated from the leaves and stems of plants

* Try this at home: Place a plastic bag over part of a potted plant at home. Place it out in the sun for a day. Take the bag off. Do you think the bag will be wet or dry? Why?

Does water have to be a liquid before it can evaporate?

• No, sometimes in special cases, water can change from being a solid into a gas directly (no melting!)

• This is called sublimation

What happens to the water vapor once it evaporates into the air?

• Condensation is the process of water changing from a gas (water vapor) back to its liquid form

• Clouds are made from condensed water droplets

• Condensation is also what causes your glass of lemonade to “sweat”

“When it rains, it pours…”

• When condensed water vapor starts to build up in clouds, eventually the millions of tiny droplets start to combine and get too heavy for the clouds

• These droplets fall as precipitation

• Precipitation includes rain, snow, sleet and hail

Where does all that precipitation go?

• As precipitation falls, much of it seeps into the ground

• This is called infiltration

So how is it a cycle?• Because these

processes never stop.• For example, after

infiltrating into the groundwater, water may flow into a stream where water can be evaporated once more!