Water Cycle Presented by Kesler Science Essential Questions

Water Cycle Presented by Kesler Science

Essential Questions: 1. How does water continually cycle among land, oceans, and atmosphere? 2. What forms does water take through this cycle? 3. How is the water cycle affected by the sun and gravity?

Water Cycle Water cycle • Also called the Hydrologic Cycle • Process by which water circulates between the Earth’s oceans, atmosphere, and land • Involves water storage, evaporation, transpiration, condensation, precipitation, and runoff. © Kesler. Science. com

Water cycle Water Storage • Oceans – super storage for the water cycle - holds 96. 5% of Earth’s water • Primary pathway into the water cycle • Oceans, seas, lakes , and rivers provide nearly 90% of the moisture in our atmosphere through evaporation. © Kesler. Science. com

Quick Action – Water Cycle Find a partner you have not worked with before. Each person talk for 30 seconds about what you already know about evaporation. Ready, set, go… What did you learn from your partner? Together write a definition for evaporation. Where does evaporation fit in the diagram of the water cycle? C. B. A. © Kesler. Science. com

Water Cycle Evaporation • Process by which water changes from a liquid to a gas • Primary pathway that water moves from the liquid state back into the water cycle as water vapor © Kesler. Science. com

Water Cycle Evaporation • Heat (energy) from the sun is necessary for evaporation to occur. • Energy breaks bonds that hold water molecules together. • Molecules move fast at boiling point 212 o F • Slow at freezing point 32 o F © Kesler. Science. com

Water Cycle Evaporation • Sublimation – the process of snow and ice changing into water vapor without first melting into water. • Evapotranspiration – water lost to the atmosphere from the ground surface and transpiration of groundwater by plants through their leaves. © Kesler. Science. com Dry Ice - Sublimation

Water Cycle Water Storage Atmosphere • Superhighway used to transport water around the globe • Involves condensation and precipitation © Kesler. Science. com

Quick Action – Water Cycle Talk with a new partner about the terms condensation and precipitation. One of you tell about condensation the other about precipitation. Together write or draw a short explanation of how you think clouds form and produce precipitation. © Kesler. Science. com

Water Cycle Condensation • Process in which water vapor in the air is changed into liquid water. • Loss of energy allows water molecules to bond. • Forms clouds, fog © Kesler. Science. com

Water Cycle Rain formation in clouds How do the Sun and gravity affect the formation of clouds and precipitation? © Kesler. Science. com

Water Cycle Precipitation • Water released from clouds in the form of rain, freezing rain, sleet, snow and hail • Provides the delivery system of atmospheric water to the Earth © Kesler. Science. com

Quick Action – INB Template Water Cycle INB Template 1. 2. 3. 4. © Kesler. Science. com Cut out the Template on the solid lines Glue outside tabs into notebook Opens like windows Write notes underneath window panes

Water Cycle Water Storage Ice, snow, groundwater • Water locked up in its present state for a relatively long period of time • Involves runoff and infiltration © Kesler. Science. com

Water Cycle Runoff • Precipitation that did not get absorbed into soil, or evaporate • Ice caps and glaciers provides runoff from melting • Water moved by gravity makes its way into places that collect water – rivers, lakes, ponds, ocean © Kesler. Science. com

Quick Action – Water Cycle Think back to the last time a strong rain storm came through your town. Talk with a partner about that storm and compile a list of places you saw lots of runoff. Next think about the last time it rained very gently for a short time. Together make a list of places you saw runoff. Were your two list similar? Different? Why do you think they were similar/different? © Kesler. Science. com

Water Cycle Infiltration • The downward process of moving water from the land surface into soil or porous rock • Groundwater - Large amounts of water stored in the ground • Aquifer – another name for groundwater, usually describes water bearing formations © Kesler. Science. com Aquifer

Water Cycle Watershed • The area of land where all the water that falls in it and drains off of, goes into the same place • Can be as small as a footprint or as large as all the land that drains water into the Mississippi River © Kesler. Science. com

Quick Action – Water Cycle Draw a picture of a watershed that represents an area of only one square meter. Include in your picture the source of the water, what it runs off over, what it collects in. Here is a little help. It could be in your backyard, on your street, at the pool, in a garden. Remember watersheds can be as small as a footprint! © Kesler. Science. com

Check for Understanding Can you… 1. Describe how water continually cycles among land, ocean and atmosphere? 2. Identify the forms water takes through this cycle? 3. Describe how the sun and gravity affect this cycle? © Kesler. Science. com