Warm-Up What do you do when you’re thirsty and you want some water? Is this the same for everyone around the world? 2) Do you think that the majority of the Earth contains usable water? Explain why or why not.

All the Water in the World How much of this represents all the freshwater in the world? How much of this is frozen and inaccessible to humans? How much of this can plants, animals, and humans use? All the Water in the World All the water in the world All the FRESH water in the world (3%) All the FRESH water in the world that is not frozen in glaciers or icecaps All the FRESH water in the world that is available for humans and plants to use

Less than 1% of Earth’s water supply is ready for human use

CYCLES What is a cycle? A cycle is a repeating event or process What are some cycles in our lives? What cycles have we learned about this semester?

What are the different places water can go as it moves through and around the Earth?

What is the WATER CYCLE? Water constantly moves among the oceans, the atmosphere, the solid Earth, and the biosphere. This unending circulation of Earth’s water supply is the water cycle.

The Water Cycle The continuous circulation of Earth’s water supply. Water moves among the oceans, atmosphere, solid Earth and the biosphere The energy source for the water cycle comes from the sun

The Water Cycle WC is balanced meaning that the average annual precipitation over Earth EQUALS the amount of water that evaporates. (What goes up comes down) Evaporation exceeds precipitation over water and precipitation exceeds evaporation over land

Vocab find!! Use the textbook to find the definition of your assigned words. 10

Vocabulary Words Evaporation Condensation Transpiration Sublimation Infiltration Runoff Precipitation

1 3 6 2 5 4 7

How does surface effect the water cycle? How will water act differently in the ball field and in the parking lot??? 14

WATER CYCLE BALANCE How does the law of conservation of matter relate to the water cycle? Water is never created or destroyed. It just cycles through different forms in what we call the water cycle.

WATER CYCLE BALANCE Because water is never created or destroyed, the water cycle is balanced. Balance in the water cycle means that the average annual precipitation over Earth equals the amount of water that evaporates

WATER CYCLE BALANCE There are local imbalances Ex: over the ocean, more water evaporates than precipitates Ex: over land, more water precipitates than evaporates

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FAST FACT The average person in the United States uses anywhere from 80-100 gallons of water per day. Flushing the toilet actually takes up the largest amount of this water.

Circle the events where water moves WITH gravity: Infiltration Precipitation Runoff Evaporation Transpiration Circle the events where water moves AGAINST gravity:

Water Cycle Rap http://www.youtube.com/watch?v=F9Yi4dAzHsc Quietly listen to rap and fill in your lyrics as we go

Homework Draw your version of the water cycle. Label and define all steps in the process

EXIT TICKET ___1. Which of the following processes in the water cycle goes against gravity? a. Infiltration c. Run-off b. Evaporation d. Erosion ___2. Which of the following water cycle processes is most likely to occur on a steep slope? ___3.  Where is the 3% of Earth’s freshwater found? a. Oceans c. Glaciers b. Lakes d. Clouds  ___4. Where is 97% of Earth’s water located? ___5. What process is represented by letter C on the diagram? b. Transpiration d. Erosion The diagram to the right is a cross sectional view of rainwater through zone A? (4.04) Runoff Saturation Infiltration Precipitation