OBJECTIVES OF TODAY’S ACTIVITY TOPIC: Circulation in the Atmosphere and Oceans After today’s activity, you will be able to: Describe how energy drives movement and change in the hydrosphere and atmosphere. You should also be able to predict circulation in the atmosphere and hydrosphere may change due to global warming. Both groups
CASUAL PRINCIPLES 1. Gravitational energy, thermal energy, and/or chemical energy drive all movement and change of matter on Earth. 3. Matter moves and changes to return a system to equilibrium. 5. Temperature is a measure of the movement of molecules. Higher temperature means molecules are moving faster. 6. When molecules move faster, the density of most substances decreases. Water is anomaly because liquid water is more dense than ice. 7. Buoyancy causes materials to rise or fall due to the relative density of materials. Both groups
Demonstration: Circulation Videos about temperature-drive circulation of fluids. http://www.youtube.com/watch?v=Ci5P5yy0xlg http://www.youtube.com/watch?v=QBVMm9i-pvo&feature=fvw http://www.youtube.com/watch?v=7xWWowXtuvA&feature=related Both groups
Background: Temperature and Density Circulation: The movement of material due to differences in those materials. Q. How will temperature cause differences in density? A. Increasing temperature causes molecules to move faster, spread out and for the density of decrease. http://blank005.tripod.com/geology/graphic/tectonics/beaker.gif
Background: Atmospheric Circulation Q. What happens in the atmosphere when one place is heated more than another place? Experimental group http://alphacentauriobservatory.com/images/Hadley%20Cell%20Circulation.jpg A. Air in the warmer regions will rise due to the decreased density, and colder places will sink due to increased density.
Background: Density of Saline Water Q. What happens to the density of water if salt is added? Experimental group http://www.science-experiments.info/egg%20floating%20experiment.gif A. Salt water is more dense than fresh water because there are NaCl molecules mixed with the H2O.
Background: Haline Circulation Q. What will happen in a system where there is lower density fresh water and higher density salt water? Experimental group Salt water sinks and fresh water stays in the upper layer.
Source: Lava Lamp There are features of the lava lamp that correspond to the basic principles we use to explain movement and change. http://www.traderscity.com/board/userpix4/3091-lava-lamp-glitter-wax-motion-magma-1.jpg Lava lamp Principle Hot and cold regions Heat from light bulb Two fluids Spherical and cylindrical masses of circulating fluid Experimental group
Target: Atmospheric Circulation There are features of the atmosphere that correspond to the basic principles we use to explain movement and change. Atmosphere Principle Hot and cold regions Heat from the ground Hot and cold air Hadley cells Experimental group
Alignment: Comparing Lava Lamp & Atmosphere There are features of the lava lamp and atmospheric circulation that correspond to the basic principles we use to explain movement and change. Lava lamp Atmosphere Principle Hot and cold regions Heat from light bulb Heat from the ground Two fluids Hot and cold air Spherical and cylindrical masses of circulating fluid Hadley cells Experimental group
Differences: Comparing Lava Lamp & Atmosphere There are features of the lava lamp and atmospheric circulation that don’t correspond to the basic principles we use to explain movement and change. Lava Lamp Difference Atmosphere Electricity Light bulb Solar radiation Ground Experimental group
Group work & Homework: Circulation Part 2 : Thermohaline Circulation Work in your groups to reason out the relationship between atmosphere and ocean circulation. Fill out the Group Worksheet to turn in at the end of class. Part 3: Homework If you complete your group work, you may start the homework. Please work on your own. This means your answers should be generally unique from other students. Turn in the homework using ANGEL.