04 The hydrosphere
Water distribution on Earth
Earth's water
Spheres showing:
(1) All water (sphere over western U.S., 860 miles in diameter)
(2) Fresh liquid water in the ground, lakes, swamps, and rivers (sphere over Kentucky, 169.5 miles in diameter), and
(3) Fresh-water lakes and rivers (sphere over Georgia, 34.9 miles in diameter).
Credit: Howard Perlman, USGS; globe illustration by Jack Cook, Woods Hole Oceanographic Institution (©); Adam Nieman.
MITOSIS AND MEIOSIS
MITOSIS AND MEIOSIS
MITOSIS AND MEIOSIS
Water scarcity
Watch the video and answer these 5 questions:
What do some people (women and girls in particular) do for water? They walk hours and miles (km) per day to get fresh water.
Every 15 seconds, a child dies due to water-born illness. TRUE or FALSE? Yes, it is TRUE.
Globally, domestic water use accounts for what percentage of consumption? The global domestic water use accounts for only 8% of the total water consumption.
What are the two most water-using entities in the world? Agriculture and industry. Agriculture consumes 70% while industry uses 22%.
What do you do to conserve water? Do you think that's enough? The answer is free and personal but we all need to value water as a public common good.
WATER is our most precious resource
Properties of water:
Powerful solvent
Heat absorption
Anomalous expansion (ice floats!)
Cohesion and adhesion.
MITOSIS AND MEIOSIS
WATER CYCLE
KEY CONCEPTS
2 water cycle basic ideas:
Could we be drinking the same molecule of water that was drunk by a dinosaur millions of years ago?
Reason your answer.
USES OF WATER
MITOSIS AND MEIOSIS
WATER GLOBAL CRISIS
Explained ...
World's Water Crisis
World's Water Crisis
FULL EPISODE | Netflix
Which African city is in danger of water shut down?
List other 4 cities facing a water crisis in the future.
What is the percentage of liquid freshwater in the planet?
Which country is richer in terms of water, Kuwait or Canada?
Where does Mexico city obtain most of its water?
How many liters of water do we need to produce a cotton T-shirt?
How is meat consumption linked to water scarcity?
What is considered the petroleum of the next century?
Name 3 cities irrigates by the Colorado River:
What is the difference mentioned between petroleum and water?
Do you know the meaning ofthese words:..?
AQUIFER-
CATTLE-
SEWAGE-
-ANSWERS -
How to save WATER!
About SAVING WATER
WATCH AND ANSWER
State two drawbacks of constructing a dam.
They are too expensive and can displace many local people.
THINK:
Write 3 saving water actions that you can take at home on a local level.
Which type of measures results in more efficience saving water, simple everyday actions like the ones mentioned in the previous questions or actions to promote savin water in industry and farming? WHY?
Urban Water Cycle
Urban water cycle PLANNING Activity
Make a drawing to represent the URBAN WATER CYCLE, make sure to include the following labeled drawings in it.
LABELS
River
City
Waste Water Treatment Plant - WWTP (depuradora)
Drinking Water Treatment Plant - WTP (potabilizadora)
Water collection
Pump
Water deposit (or water tower)
Pipes for (draw arrows to represent the flow of water)
Raw water
Drinking water (potable water)
Sewage or waste water.
Treated water
Activity: you have to recreate the situation above using the different pieces of paper you’ve been given. It does not have to be exactly the same, use your imagination.
Key points:
- Show where the water for drinking water treatment is taken.
- Show where that water is treated (sewage and drinking water) and write in a few words what is the aim of each of the processes.
- Use different colours for drinking/potable water, raw water, sewage water and treated water.
- Show with arrows the whole process.
Human impacts on water.
-Chapter 23-
"Good morning," said the little prince.
"Good morning," said the merchant.
This was a merchant who sold pills that had been invented to quench thirst. You need only swallow one pill a week, and you would feel no need of anything to drink.
"Why are you selling those?" asked the little prince.
"Because they save a tremendous amount of time," said the merchant. "Computations have been made by experts. With these pills, you save fifty-three minutes in every week."
"And what do I do with those fifty-three minutes?"
"Anything you like . . ."
"As for me," said the little prince to himself, "if I had fifty-three minutes to spend as I liked, I should walk at my leisure toward a spring of fresh water."
