Hydrosphere What is the Hydrosphere? The sum of all the water on the planet Life cannot exist on any other planet but can on earth because of what? Water
Water Water is only liquid in what range? Above 32 degrees Fahrenheit and below 212 Fahrenheit What two factors control the temperature of our planet? The sun and the atmosphere
Facts to Memorize The vast majority of the earth’s water supply is contained in the oceans as saltwater The vast majority of earth’s freshwater supply is stored in icebergs and glaciers The largest source of liquid freshwater is groundwater
The Hydrologic Cycle What is the Hydrologic Cycle? The process by which water is continuously exchanged between earth’s various water sources
Hydrologic Cycle Water gets into the atmosphere predominately by Evaporation and Transpiration Transpiration = Evaporation of water from plants – water evaporating off its leaves Evaporation takes water out of the oceans, lakes, rivers, and streams, while transpiration takes water from the soil
Evaporation Evaporation: the change of state in a substance from a liquid to a gas. For evaporation to take place, energy is required. The energy can come from any source: the sun, the atmosphere, the earth, or objects on the earth such as humans.
Transpiration Transpiration is the evaporation of water from plants through stomata. Stomata are small openings found on the underside of leaves that are connected to vascular plant tissues. In most plants, transpiration is a passive process largely controlled by the humidity of the atmosphere and the moisture content of the soil. Transpiration depletes soil moisture
Precipitation What is precipitation? Water falling from the atmosphere as rain, snow, sleet, or hail What is surface runoff? When precipitation falls on land and replenishes soil moisture OR it can run along the surface of the land into an ocean, lake, river, or stream
Let’s Review Precipitation can happen in what ways? What are the two ways water can return to the sky? How are clouds formed? What is soil moisture? What is surface runoff?
Experiment 5.1 Get out your Lab Report and a pencil Need two volunteers