Lake Turnover Process
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- Lake turnover is a seasonal process where layers in lakes mix due to temperature changes. - In the fall, upper layers of water cool and sink, displacing lower layers. - Winter causes ice to form, layering the lake. Spring melting mixes the layers again. - Warm summer temperatures cause layering once more until fall mixing.
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Lake Turnover Process
- 1. • Activity! Lake Turnover Question. – Please describe in three sentences how a lake changes throughout the year. Copyright © 2010 Ryan P. Murphy
- 4. • RED SLIDE: These are notes that are very important and should be recorded in your science journal. Copyright © 2010 Ryan P. Murphy
- 5. -Nice neat notes that are legible and use indentations when appropriate. -Example of indent. -Skip a line between topics -Don’t skip pages -Make visuals clear and well drawn.
- 6. • RED SLIDE: These are notes that are very important and should be recorded in your science journal. • BLACK SLIDE: Pay attention, follow directions, complete projects as described and answer required questions neatly. Copyright © 2010 Ryan P. Murphy
- 8. • Available Sheet: Properties of Water. – Note: This will be due at the end of Part III. – Bring to class everyday.
- 9. • Activity! How does cold water behave? – Drop a colored ice cube into a glass of water and record what happens in your science journal. Copyright © 2010 Ryan P. Murphy
- 10. • Answer! Cold water sinks. The colder blue water from the ice cube sank to the bottom. – Cold water sinks…But what happens to really cold water? Copyright © 2010 Ryan P. Murphy
- 11. • Answer! Cold water sinks. The colder blue water from the ice cube sank to the bottom. – Cold water sinks…But what happens to really cold water? Copyright © 2010 Ryan P. Murphy
- 12. Lower Density of Ice: Water forms aLower Density of Ice: Water forms a crystal lattice when it freezes which is lesscrystal lattice when it freezes which is less dense than water…Ice Floats!dense than water…Ice Floats! Copyright © 2010 Ryan P. Murphy
- 13. • Animation of water molecules forming a crystal lattice (ice). – Molecules attach to each other with + and – bonds. They do not move quickly around when in the solid state. • http://www.youtube.com/watch?v=RIW65QLWs
- 14. • What if ice sank? How would the world be different as we know it? Copyright © 2010 Ryan P. Murphy
- 15. • Answer! The world would be a much different place. Copyright © 2010 Ryan P. Murphy
- 16. • Ice would form and then sink to the bottom. On the next cold day / night more ice would form and sink. Copyright © 2010 Ryan P. Murphy
- 17. • This process would continue until the lake was frozen solid. Copyright © 2010 Ryan P. Murphy
- 18. • This process would continue until the lake was frozen solid. Copyright © 2010 Ryan P. Murphy
- 19. Copyright © 2010 Ryan P. Murphy
- 20. • Aquatic organisms would die, the planets climate would shift dramatically as the ice at the poles would accumulate. – Life as we know it would change for the worse. Copyright © 2010 Ryan P. Murphy
- 21. • What’s a Turnover?
- 22. • What’s a Turnover? • Answer: A dish made by folding a pastry over some filling.
- 23. • What’s a turnover?
- 24. • What’s a turnover? • Answer: A turnover is when the team with the ball loses possession of the ball, which is then gained by the other team.
- 25. • What’s a turnover? • Answer: A turnover is when the team with the ball loses possession of the ball, which is then gained by the other team.
- 26. • What’s a turnover? • Answer: A turnover is when the team with the ball loses possession of the ball, which is then gained by the other team.
- 27. • What’s a Turnover? • Answer: Measures how long a fund holds on to the stocks it buys. The longer a mutual fund holds on to a stock and the less trading the fund does, the lower the turnover will be…
- 28. • What’s a Turnover? • Answer: Measures how long a fund holds on to the stocks it buys. The longer a mutual fund holds on to a stock and the less trading the fund does, the lower the turnover will be…
- 30. • What’s turnover? • Answer: The rate at which an employer gains and loses employees.
- 31. • What’s Lake Turnover?
- 32. • What’s Lake Turnover? • Answer:
- 33. • What’s Lake Turnover? • Answer:
- 34. • What’s Lake Turnover? • Answer:
- 35. • What’s Lake Turnover? • Answer:
- 36. • What’s Lake Turnover? • Answer:
- 37. • What’s Lake Turnover? • Answer:
- 38. • What’s Lake Turnover? • Answer:
- 39. • What’s Lake Turnover? • Answer:
- 40. • What’s Lake Turnover? • Answer:
- 41. • What’s Lake Turnover? • Answer: A process where the layers that form in a lake are mixed seasonally.
- 42. • Lake Turnover… – Fall - Air temperatures drop, and the upper layers of water get cold. – Wind and chop mix the upper layers as well • These get colder, denser, heavier, and sink. – Colder water displaces the water the lake bottom forcing the lower layers to the surface. – Winter - Ice forms layer over water. Lake becomes layered – Spring – Melting ice causes water to sink and mixes layers – Summer – Warm temperatures cause layering .
- 43. • Lake Turnover… – Fall - Air temperatures drop, and the upper layers of water get cold. – Wind and chop mix the upper layers as well • These get colder, denser, heavier, and sink. – Colder water displaces the water the lake bottom forcing the lower layers to the surface. – Winter - Ice forms layer over water. Lake becomes layered – Spring – Melting ice causes water to sink and mixes layers – Summer – Warm temperatures cause layering .
- 44. • Lake Turnover… – Fall - Air temperatures drop, and the upper layers of water get cold. – Wind and chop mix the upper layers as well. • These get colder, denser, heavier, and sink. – Colder water displaces the water the lake bottom forcing the lower layers to the surface. – Winter - Ice forms layer over water. Lake becomes layered – Spring – Melting ice causes water to sink and mixes layers – Summer – Warm temperatures cause layering . Cold Wind
- 45. • Lake Turnover… – Fall - Air temperatures drop, and the upper layers of water get cold. – Wind and chop mix the upper layers as well. • Upper water layer gets colder, denser, heavier, and sink. – Colder water displaces the water the lake bottom forcing the lower layers to the surface. – Winter - Ice forms layer over water. Lake becomes layered – Spring – Melting ice causes water to sink and mixes layers – Summer – Warm temperatures cause layering .
- 46. • Lake Turnover… – Fall - Air temperatures drop, and the upper layers of water get cold. – Wind and chop mix the upper layers as well. • Upper water layer gets colder, denser, heavier, and sink. – Colder water displaces the water the lake bottom forcing the lower layers to the surface. – Winter - Ice forms layer over water. Lake becomes layered – Spring – Melting ice causes water to sink and mixes layers – Summer – Warm temperatures cause layering .
- 47. • Lake Turnover… – Fall - Air temperatures drop, and the upper layers of water get cold. – Wind and chop mix the upper layers as well. • Upper water layer gets colder, denser, heavier, and sink. – Colder water displaces the water the lake bottom forcing the lower layers to the surface. – Winter - Ice forms layer over water. Lake becomes layered – Spring – Melting ice causes water to sink and mixes layers – Summer – Warm temperatures cause layering .
- 48. • Lake Turnover… – Fall - Air temperatures drop, and the upper layers of water get cold. – Wind and chop mix the upper layers as well. • Upper water layer gets colder, denser, heavier, and sink. – Colder water displaces the water the lake bottom forcing the lower layers to the surface. – Winter - Ice forms layer over water. Lake becomes layered – Spring – Melting ice causes water to sink and mixes layers – Summer – Warm temperatures cause layering .
- 49. • Lake Turnover… – Fall - Air temperatures drop, and the upper layers of water get cold. – Wind and chop mix the upper layers as well. • Upper water layer gets colder, denser, heavier, and sink. – Colder water displaces the water the lake bottom forcing the lower layers to the surface. – Winter - Ice forms layer over water. Lake becomes layered – Spring – Melting ice causes water to sink and mixes layers – Summer – Warm temperatures cause layering .
- 50. • Lake Turnover… – Fall - Air temperatures drop, and the upper layers of water get cold. – Wind and chop mix the upper layers as well. • Upper water layer gets colder, denser, heavier, and sink. – Colder water displaces the water the lake bottom forcing the lower layers to the surface. – Winter - Ice forms layer over water. Lake becomes layered – Spring – Melting ice causes water to sink and mixes layers – Summer – Warm temperatures cause layering .
- 51. • Lake Turnover… – Fall - Air temperatures drop, and the upper layers of water get cold. – Wind and chop mix the upper layers as well. • Upper water layer gets colder, denser, heavier, and sink. – Colder water displaces the water the lake bottom forcing the lower layers to the surface. – Winter - Ice forms layer over water. Lake becomes layered – Spring – Melting ice causes water to sink and mixes layers – Summer – Warm temperatures cause layering .
- 52. • Lake Turnover… – Fall - Air temperatures drop, and the upper layers of water get cold. – Wind and chop mix the upper layers as well. • Upper water layer gets colder, denser, heavier, and sink. – Colder water displaces the water the lake bottom forcing the lower layers to the surface. – Winter - Ice forms layer over water. Lake becomes layered – Spring – Melting ice causes water to sink and mixes layers – Summer – Warm temperatures cause layering .
- 53. • Lake Turnover… – Fall - Air temperatures drop, and the upper layers of water get cold. – Wind and chop mix the upper layers as well. • Upper water layer gets colder, denser, heavier, and sink. – Colder water displaces the water the lake bottom forcing the lower layers to the surface. – Winter - Ice forms layer over water. Lake becomes layered – Spring – Melting ice causes water to sink and mixes layers – Summer – Warm temperatures cause layering .
- 54. • Lake Turnover… – Fall - Air temperatures drop, and the upper layers of water get cold. – Wind and chop mix the upper layers as well. • Upper water layer gets colder, denser, heavier, and sink. – Colder water displaces the water the lake bottom forcing the lower layers to the surface. – Winter - Ice forms layer over water. Lake becomes layered – Spring – Melting ice causes water to sink and mixes layers – Summer – Warm temperatures cause layering .
- 55. • Lake Turnover… – Fall - Air temperatures drop, and the upper layers of water get cold. – Wind and chop mix the upper layers as well. • Upper water layer gets colder, denser, heavier, and sink. – Colder water displaces the water the lake bottom forcing the lower layers to the surface. – Winter - Ice forms layer over water. Lake becomes layered. – Spring – Melting ice causes water to sink and mixes layers – Summer – Warm temperatures cause layering .
- 56. • Lake Turnover… – Fall - Air temperatures drop, and the upper layers of water get cold. – Wind and chop mix the upper layers as well. • Upper water layer gets colder, denser, heavier, and sink. – Colder water displaces the water the lake bottom forcing the lower layers to the surface. – Winter - Ice forms layer over water. Lake becomes layered. – Spring – Melting ice causes water to sink and mixes layers
- 57. • Available Sheet: Properties of Water. – Note: This will be due at the end of Part III. – Bring to class everyday.
- 58. • Lake Turnover… – Fall - Air temperatures drop, and the upper layers of water get cold. – Wind and chop mix the upper layers as well. • Upper water layer gets colder, denser, heavier, and sink. – Colder water displaces the water the lake bottom forcing the lower layers to the surface. – Winter - Ice forms layer over water. Lake becomes layered. – Spring – Melting ice causes water to sink and mixes layers – Summer – Warm temperatures cause layering.
- 59. • Please draw the following in your journal. – (About ½ Page)
- 66. Epilimnion
- 67. Epilimnion
- 68. • Epilimnion: The upper layer in a layered lake. Copyright © 2010 Ryan P. Murphy
- 70. • Thermocline: A layer within a body of water where the temperature changes rapidly with depth. Copyright © 2010 Ryan P. Murphy
- 75. Epilimnion Thermocline Low Oxygen because isolated from oxygen sources.
- 76. • Cold water fish such as trout and salmon enjoy the colder temperatures and oxygen levels of the thermocline. Copyright © 2010 Ryan P. Murphy
- 77. • Cold water fish such as trout and salmon enjoy the colder temperatures and oxygen levels of the thermocline. Copyright © 2010 Ryan P. Murphy
- 78. • Cold water fish such as trout and salmon enjoy the colder temperatures and oxygen levels of the thermocline. Copyright © 2010 Ryan P. Murphy
- 80. • Hypolimnion - The bottom and most dense layer of water in a lake. Non-circulatory and remains cold throughout the year Copyright © 2010 Ryan P. Murphy
- 82. • Activity! Creating Lake Turnover in a Jar.
- 83. • Activity! Creating Lake Turnover in a Jar. – Teacher will have ice cold water (blue food coloring) – Very hot water (red food coloring) – Pour in cold water first. – Then use Petri dish as cover and pour the hot on top of the cold without mixing the layers.
- 84. • Activity! Creating Lake Turnover in a Jar. – Teacher will have ice cold water (blue food coloring) – Very hot water (red food coloring)
- 85. • Activity! Creating Lake Turnover in a Jar. – Teacher will have ice cold water (blue food coloring) – Very hot water (red food coloring) – Pour in cold water first.
- 86. • Activity! Creating Lake Turnover in a Jar. – Teacher will have ice cold water (blue food coloring) – Very hot water (red food coloring) – Pour in cold water first. – Then use Petri dish as cover and pour the hot on top of the cold without mixing the layers.
- 87. • Activity! Set-up of Lake Turnover. Cold Hot Device to prevent mixing Remove after.
- 88. • Activity! Lake Turnover. – Please observe the layering of the Lake in summer (Start) – Teacher will ask students to blow on top layers. (Early Fall) – Teacher will add ice cubes (Early Winter) – Same effect occurs with Spring
- 89. • Activity! Lake Turnover – Please sketch the following in your journal. Summer Stagnation Fall Turnover Winter Stagnation Spring Turnover Copyright © 2010 Ryan P. Murphy
- 90. Summer Stagnation Fall Turnover Winter Stagnation Spring Turnover Copyright © 2010 Ryan P. Murphy
- 91. Summer Stagnation Fall Turnover Winter Stagnation Spring Turnover Copyright © 2010 Ryan P. Murphy
- 92. Summer Stagnation Fall Turnover Winter Stagnation Spring Turnover Copyright © 2010 Ryan P. Murphy
- 93. Summer Stagnation Fall Turnover Winter Stagnation Spring Turnover Copyright © 2010 Ryan P. Murphy
- 94. Summer Stagnation Fall Turnover Winter Stagnation Spring Turnover Copyright © 2010 Ryan P. Murphy
- 95. Summer Stagnation Fall Turnover Winter Stagnation Spring Turnover Copyright © 2010 Ryan P. Murphy
- 96. Summer Stagnation Fall Turnover Winter Stagnation Spring Turnover Copyright © 2010 Ryan P. Murphy Layers form under ice
- 97. Summer Stagnation Fall Turnover Winter Stagnation Spring Turnover Copyright © 2010 Ryan P. Murphy
- 98. Summer Stagnation Fall Turnover Winter Stagnation Spring Turnover Copyright © 2010 Ryan P. Murphy
- 99. • Activity! Lake Turnover Question. – Please describe in three sentences how a lake changes throughout the year. Copyright © 2010 Ryan P. Murphy
- 100. • Possible Answer: Throughout the year, a lake goes through many changes. In the summer the lake has three distinct layers. Colder temperatures and wind in the fall mix the layers. After the ice forms across the lake, winter layers form. The melting ice mixes the layers in the spring. The lake returns to it’s summer layering when the temperatures warm. Copyright © 2010 Ryan P. Murphy
- 101. • Possible Answer: Throughout the year, a lake goes through many changes. In the summer the lake has three distinct layers. Copyright © 2010 Ryan P. Murphy
- 102. • Possible Answer: Throughout the year, a lake goes through many changes. In the summer the lake has three distinct layers. Colder temperatures and wind in the fall mix the layers. Copyright © 2010 Ryan P. Murphy
- 103. • Possible Answer: Throughout the year, a lake goes through many changes. In the summer the lake has three distinct layers. Colder temperatures and wind in the fall mix the layers. After the ice forms across the lake, winter layers form. Copyright © 2010 Ryan P. Murphy
- 104. • Possible Answer: Throughout the year, a lake goes through many changes. In the summer the lake has three distinct layers. Colder temperatures and wind in the fall mix the layers. After the ice forms across the lake, winter layers form. The melting ice mixes the layers in the spring. Copyright © 2010 Ryan P. Murphy
- 105. • Possible Answer: Throughout the year, a lake goes through many changes. In the summer the lake has three distinct layers. Colder temperatures and wind in the fall mix the layers. After the ice forms across the lake, winter layers form. The melting ice mixes the layers in the spring. The lake returns to it’s summer layering when the temperatures warm. Copyright © 2010 Ryan P. Murphy
- 106. • Possible Answer: Throughout the year, a lake goes through many changes. In the summer the lake has three distinct layers. Colder temperatures and wind in the fall mix the layers. After the ice forms across the lake, winter layers form. The melting ice mixes the layers in the spring. The lake returns to it’s summer layering when the temperatures warm. Copyright © 2010 Ryan P. Murphy Learn more about lake turnover at… http://www.islandnet.com/~see/weather/elements/turnlakes.htm
- 107. • You can now complete this page.
- 109. • Video Link! Lake Turnover (Optional) – http://www.youtube.com/watch?v=uSFSNTI67wc
- 112. Areas of Focus within the Water Molecule Unit: Locations of Water on the Planet, Importance of Water, Groundwater, Groundwater Pollution, The Water Molecule, Properties of Water, Polarity, Cohesion, Adhesion, Capillary Action, High Specific Heat, Water has a Neutral pH, Lower Density of Ice. Water is the Universal Solvent, Mixtures Full unit can be found at… http://sciencepowerpoint.com/Water_Molecule_Unit.html
- 118. • Please visit the links below to learn more about each of the units in this curriculum – These units take me about four years to complete with my students in grades 5-10. Earth Science Units Extended Tour Link and Curriculum Guide Geology Topics Unit http://sciencepowerpoint.com/Geology_Unit.html Astronomy Topics Unit http://sciencepowerpoint.com/Astronomy_Unit.html Weather and Climate Unit http://sciencepowerpoint.com/Weather_Climate_Unit.html Soil Science, Weathering, More http://sciencepowerpoint.com/Soil_and_Glaciers_Unit.html Water Unit http://sciencepowerpoint.com/Water_Molecule_Unit.html Rivers Unit http://sciencepowerpoint.com/River_and_Water_Quality_Unit.html = Easier = More Difficult = Most Difficult 5th – 7th grade 6th – 8th grade 8th – 10th grade
- 119. Physical Science Units Extended Tour Link and Curriculum Guide Science Skills Unit http://sciencepowerpoint.com/Science_Introduction_Lab_Safety_Metric_Methods. html Motion and Machines Unit http://sciencepowerpoint.com/Newtons_Laws_Motion_Machines_Unit.html Matter, Energy, Envs. Unit http://sciencepowerpoint.com/Energy_Topics_Unit.html Atoms and Periodic Table Unit http://sciencepowerpoint.com/Atoms_Periodic_Table_of_Elements_Unit.html Life Science Units Extended Tour Link and Curriculum Guide Human Body / Health Topics http://sciencepowerpoint.com/Human_Body_Systems_and_Health_Topics_Unit.html DNA and Genetics Unit http://sciencepowerpoint.com/DNA_Genetics_Unit.html Cell Biology Unit http://sciencepowerpoint.com/Cellular_Biology_Unit.html Infectious Diseases Unit http://sciencepowerpoint.com/Infectious_Diseases_Unit.html Taxonomy and Classification Unit http://sciencepowerpoint.com/Taxonomy_Classification_Unit.html Evolution / Natural Selection Unit http://sciencepowerpoint.com/Evolution_Natural_Selection_Unit.html Botany Topics Unit http://sciencepowerpoint.com/Plant_Botany_Unit.html Ecology Feeding Levels Unit http://sciencepowerpoint.com/Ecology_Feeding_Levels_Unit.htm Ecology Interactions Unit http://sciencepowerpoint.com/Ecology_Interactions_Unit.html Ecology Abiotic Factors Unit http://sciencepowerpoint.com/Ecology_Abiotic_Factors_Unit.html
- 120. • The entire four year curriculum can be found at... http://sciencepowerpoint.com/ Please feel free to contact me with any questions you may have. Thank you for your interest in this curriculum. Sincerely, Ryan Murphy M.Ed