1. Do Now:
Using the words below, write a quick note to your alien friend from Pluto.
Troposphere
Air pressure
Stratosphere
Ozone Layer
CFC’s

2. Announcements Homework packet due on Friday
Quiz on Friday over layers of the atmosphere and water cycle
Formative test on Wednesday next week
Announcements

4. Water cycle game
Writing your journey
Case study: Massachusetts
Agenda

5. We need to understand that every drop of water on the planet has been here since its’ beginnings.
Water cycle is never ending and is constantly recycling.
Why?

6. 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.
Water cycle game

7. 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.

8. Write up activity You’re going to be writing using a RAFT prompt.
Role: Water molecule
Audience: Your Pluto alien friend
Format: Travel brochure T:
Write up activity

9. Include A brief description of your personal journey
Other “sites” you can see while touring the Water cycle
This is if you didn’t visit all the sites
How best to journey through the water cycle.
This is going to be different and totally up to you! Remember, the water cycle is a journey that takes COUNTLESS ways.
Include

10. Some Questions to Ponder….
Do we have more or less water than 1,000 years ago?
Where does water go after it rains?
How much water is there on Earth?
Some Questions to Ponder….

11. Do We Have More or Less Water Than 1,000 Years Ago?
Actually, we have always had the EXACT same amount of water.
In fact, we have the SAME water as forever ago! That means we’re drinking the same water that the dinosaurs drank!
Do We Have More or Less Water Than 1,000 Years Ago?

12. What is the water cycle?

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

14. Let’s start with evaporation
What is 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
Let’s start with evaporation

15. 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?
Transpiration

16. 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
Does water have to be a liquid before it can evaporate?

17. 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”
What happens to the water vapor once it evaporates into the air?

18. “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
“When it rains, it pours…”

19. Where does all that precipitation go?
As precipitation falls, much of it seeps into the ground
This is called infiltration
Where does all that precipitation go?

20. 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!
So how is it a cycle?