Water Long Version

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Water Long Version

  1. 1. How do people use water? <ul><li>With your table partner / group read the following and be prepared to report on how people use water: </li></ul><ul><ul><li>Agriculture (p 16) </li></ul></ul><ul><ul><li>Industry (p 17) </li></ul></ul><ul><ul><li>Transportation (p 17) </li></ul></ul><ul><ul><li>Recreation (p 18) </li></ul></ul><ul><ul><li>Home (p 17) </li></ul></ul>
  2. 2. Water: A Vital Resource 6 th Grade Science KMS
  3. 3. How do people use water? (video clip)
  4. 4. Why is water so important to life? (p 19 -20) 0.037% of 3% Water vapor 0.34 % of 3% Lakes and Rivers 11 % of 3% Deep Groundwater 12% of 3% Shallow Groundwater 76 % of 3% Ice 97% Salt Water 1000 100% Earth ml % Type of Water
  5. 5. How much fresh water do we have? <ul><li>With your group complete the “Sharpen your Skills Activity” p. 20 </li></ul>.0011 0.037% of 3% Water vapor .1020 0.34 % of 3% Lakes and Rivers 3.30 11 % of 3% Deep Groundwater 3.60 12% of 3% Shallow Groundwater 22.8 76 % of 3% Ice 970 97% Salt Water 1000 100% Earth ml % Type of Water
  6. 6. What is the structure of water? <ul><li>Hydrogen (a gas by itself) </li></ul><ul><li>Oxygen (a gas by itself) </li></ul><ul><li>2 H atoms + 1 O atom </li></ul><ul><li>Polar molecule (like a small magnet) </li></ul>
  7. 7. What is a water molecule? (video clip)
  8. 8. Surface Tension <ul><li>Tightness across surface of water </li></ul><ul><li>Water molecules “stick together” like magnets </li></ul><ul><li>Ex. (drops of water, paper clip floating, “cupside down” demo) </li></ul>
  9. 9. Surface Tension <ul><li>From a height of about 10 cm drop one drop of one liquid on your wax paper watch what happens when it hits the wax paper, move the wax paper around to make the drop follow the path. </li></ul><ul><li>Follow the same steps with a different liquid. </li></ul><ul><li>Record your observations and draw a picture of the differences. </li></ul><ul><li>Try to float a paper clip on the water and one other liquid </li></ul>
  10. 10. Capillary Action <ul><li>Water molecules attraction to each other + attraction to surrounding materials </li></ul><ul><li>Water can act against gravity </li></ul><ul><li>Ex. (water in plants, pores in bricks, paper towel) </li></ul>
  11. 11. States of Water <ul><li>Solid- </li></ul><ul><ul><li>Molecules (Mlc) close-together </li></ul></ul><ul><ul><li>Water forms “set” structure </li></ul></ul><ul><ul><li>Vibrating in place (cold) </li></ul></ul>
  12. 12. States of Water <ul><li>Liquid </li></ul><ul><ul><li>Mlc move more freely </li></ul></ul><ul><ul><li>Water takes shape of container </li></ul></ul><ul><ul><li>Mlc medium speed & temp. </li></ul></ul>
  13. 13. States of Water <ul><li>Gas </li></ul><ul><ul><li>Mlc move very freely </li></ul></ul><ul><ul><li>Spread out & fill space </li></ul></ul><ul><ul><li>Move fast (Hot) </li></ul></ul>
  14. 15. Density <ul><li>Each box has the same volume. If each ball has the same mass, which box would weigh more? Why? </li></ul>
  15. 16. Density <ul><li>The box that has more balls has more mass per unit of volume (DENSITY) </li></ul><ul><li>Density= Mass/Volume </li></ul><ul><li>Density = grams/milliliter </li></ul><ul><li>http://www.edinformatics.com/math_science/density.htm </li></ul>
  16. 17. Density Practice <ul><li>A certain rock has a mass of 4 g and a volume of 2 ml what is the density? </li></ul>
  17. 18. Soda Comparison: Diet vs Regular <ul><li>The mass of a can of soda is _____ the volume of the can of soda is ________ the density is _________ </li></ul><ul><li>The mass of a can of diet soda is _____ the volume of the can of diet soda is ________ the density is _________ </li></ul>
  18. 19. Soda Comparison Regular Soda Diet Soda Density Volume Mass
  19. 20. Density Hypothesis <ul><li>Your group will receive a vial with salt water and a vial with fresh water. Write a hypothesis about what you think will happen when both are placed in a tank of water. </li></ul>
  20. 21. Density <ul><li>The mass of a vial of fresh water is _____ the volume of the vial of fresh water is ________ the density is _________ </li></ul><ul><li>The mass of a vial of fresh water is _____ the volume of the vial of fresh water is ________ the density is _________ </li></ul>
  21. 22. Density Activity Fresh Water Salt Water Density Volume Mass
  22. 23. Density <ul><li>Based on your calculations, do you want to change your hypothesis? </li></ul>
  23. 24. Factors that Effect Density <ul><li>Dissolved solids (Salt, Minerals, etc.) </li></ul><ul><li>Temperature </li></ul><ul><ul><li>Hot water is less dense </li></ul></ul>
  24. 25. Calculate and Determine Which of the Following Could Be The Same Substance 13ml 39g D 4ml 2g C 40ml 200g B 2ml 6g A Density Volume Mass Substance
  25. 26. Answers 3 g/ml 13ml 39g D 0.5 g/ml 4ml 2g C 5 g/ml 40ml 200g B 3 g/ml 2ml 6g A Density Volume Mass Substance
  26. 27. Water Properties: Solvent <ul><li>Solvent </li></ul><ul><ul><li>A liquid that dissolves another substance </li></ul></ul><ul><li>Solute </li></ul><ul><ul><li>Substance that is dissolved (Salt, Sugar, etc.) </li></ul></ul>
  27. 28. Solvent Activity <ul><li>Measure 100 ml of water into each of 4 beakers </li></ul><ul><li>Add 5ml of each of the following to each of the 4 beakers: Salt, Sand, Powdered Drink Mix, Oil </li></ul><ul><li>Write a hypothesis stating which substances water will dissolve the best/worst </li></ul>
  28. 29. Solvent Activity <ul><li>Draw a picture and describe the results </li></ul>

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