1

2 Midterm Test We will test over Unit 3 on this Friday 3/3/17.

3

4 Water Cycle Project

5 Pre-AP Project Each student will create a model of the water cycle which can be used to teach a fellow blind student. You will be graded on the following: It must be made exclusively out of recycled items. Must be an effective tool to teach a blind person. (Must be able to identify each “part” via touch and use no visual cues) No liquids are allowed in class. Must include the following parts of the water cycle, and be able to explain each: Evaporation Condensation Precipitation Run Off Infiltration Sublimation Transpiration Due Tuesday 3/7/17

6 6th Grade Science ProjectDevelop a poster that details all the parts of the water cycle.. Must be an effective tool to present/teach from. No liquids allowed in class. Must include a representation the following parts of the water cycle, and an explanation of each: Evaporation Condensation Precipitation Run Off Infiltration Sublimation Transpiration. Due Monday 3/6/17

7

8 Ecosystem Cycles: Water Cycle

9 Condensation Condensation Precipitation Precipitation Transpiration Evaporation Surface Run-off Seepage Ground Water

10 The Water Cycle Water cycles between the oceans, atmosphere and land. All living organisms require water. A. Water enters the atmosphere as water vapor, a gas, when water evaporates from the ocean or other bodies of water. Evaporation—the process by which water changes from a liquid to a gas. B. Water can also enter the atmosphere by evaporating from the leaves of plants— Transpiration.

11 The Water Cycle C. Precipitation--rain, snow, sleet, or haila. The sun heats the atmosphere. b. Warm, moist air rises and cools. c. Eventually, the water vapor condenses into tiny droplets that form clouds. (Condensation) d. When the droplets become large enough, the water return to Earth’s surface.

12 The Water Cycle D. Run-off—Precipitation runs along the surface of the ground until it enters a river or a stream that carries the run-off back to an ocean or lake. E. Seepage—Rain also seeps into the soil, some of it deeply enough to become ground water. Water in the soil enters plants through the roots, and the water cycle begins anew.

13 The Water Cycle F. Sublimation—is the transition of a substance directly from the solid to the gas phase without passing through the intermediate liquid phase. In this phase solid ice particles immediately go into a gaseous state.

14 Condensation Condensation Precipitation Precipitation Transpiration Evaporation Surface Run-off Seepage Ground Water

15

16 Water Cycle Going Deeper

17 Evaporation During evaporation liquid water (usually on the surface) turns into a gas. The water molecule moving fast enough that it breaks away from the liquid and gets into a gaseous form. The molecule moves upward in the atmosphere because it is moving faster making it less dense.

18 Evaporation When water evaporates, only the water molecules move into the atmosphere. This means if it had other materials in it (dust, minerals, etc.) they would be left behind.

19 Transpiration Plant cells can lose the water found in their central vacuole. This water then moves into the atmosphere. If the water is not replaced, the central vacuole can no longer support the cell and the cell begins to lose its shape. This is what causes a plant to wilt. (Succulent)

20 Succulents Succulent plants are plants that have certain adaptations that allow them to live in environments with little water. They have developed waxy outer coatings on their leaves to reduce the amount of water loss through transpiration

21 Condensation When the water molecules move higher and higher into the atmosphere the temperature becomes colder. This causes the water molecules to slow down. They then begin to attach to particles, like dust, in the air. As the molecules attach they move from a gas into a liquid. This is what forms a cloud. https://www.youtube.com/watch?v=-YySltYzvtU

22 Precipitation The water droplets in liquid or solid form continue to build upon one another. Soon this falls to the earth and we know it as precipitation. Water doesn’t fall where it came from. Otherwise the majority of rain would fall over the oceans. Instead clouds get moved my winds. This is what allows regions who do not have any bodies of water to receive some in the form of precipitation. (Desert examples)

23 Prevailing Winds

24 Desert

25 Runoff As liquid water moves along the ground it moves materials into the local bodies of water. Along the way it picks up other material such as minerals and other soil deposits. https://www.youtube.com/watch?v=L9dpXa_Iemo (Ocean salt)

26 Infiltration Water doesn’t just run along the ground, some of it makes its way into the ground. In doing so it causes the water table to be raised. Which means more and more water is available to wells. (Wells)

27 Water Table

28 Water Table

29

30

31 https://www.youtube.com/watch?v=al-do-HGuIk

32 Water Cycle Questions The water molecule is in which state(s) of matter during the different phases of the water cycle Evaporation Condensation Precipitation Transpiration Sublimation A water molecule needs energy in order to change its state of matter. Where does the energy come from? What would happen to the water cycle if the pull of Earth’s gravity doubled? Illustrate the water cycle. Includes these key words: Evaporation, Condensation, Precipitation, Run Off, Transpiration, Infiltration, and Sublimation . (DOK3) Explain what a water table is, and how its affected by the water cycle.