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Hydrosphere for Tillman
Transcript of Hydrosphere for Tillman
What other words can you think of with "sphere" in them? (Hint: "Sphere" is at the end of the words.) The Hydrosphere Define Water 3/4 of the Earth is covered with water.
Where is most of the water found?
Pacific is the largest ocean. All of the Waters of the Earth make up the Hydrosphere. Check In! (Talk to your partner- then share with the class)
How much of the Earth is NOT covered in water? (Percentage?)
What does that say about life on Earth? "Salinity is a measure of how salty water is."
The ocean may be more salty here and less salty there.
What does this say about how salt effects water? Who has swam in the ocean?
Did you taste the water? Experiment Time! Explain your Results: write in your science notebooks
Infer: Suppose you weigh a spoonful of water from each layer. Which would be the heaviest? the lightest? Why- explain your thinking.
What do you think will happen throughout the rest of the day to you experiment? Predict through words or illustration what you think the water will look like in 2 hours. In 5 hours. Check in! Oceans have different temperatures: Sometimes warm, hot, or cold.
Cold water with high salinity = heavier than warmer water or water with less salinity. Temperature and Resources: Check In!
Why do you think the ocean water has different temperatures base on your experiment? (Talk with your partner) Where does the salinity come from?
Oceans get salt from rivers. Rivers dissolve small amounts of salts from rocks and soil and carry the salts to the ocean.
Most of this salt is sodium chloride- common table salt. When water evaporates from the ocean, the dissolved salts are left behind in the water. Salinity Carefully use the stopper to add in a 4 mm layer of blue water to the cup of clear water. Next carefully add the red water with the stopper so that there is a 4 mm layer. To one glass of water add 1/2 spoonful of salt and 5 drops of blue food coloring.
To another glass, add 5 drops of red food coloring.
To the final glass, add 2 spoonfuls of salt. What happened? 3 Volunteers from our audience! Journal:
In your own words, explain what the hydrosphere is.
How does salinity and temperature affect water? (use evidence from our experiment in your explanation.
How has your definition of water changed since the beginning of class? 1st Volunteer: 2nd Volunteer: 3rd Volunteer: 1 more
to clean up 5 at a time may come see. Please wait to be called.