Monday, October 19, 2015 HOMEWORK: Make 10 vocab flash cards: direct evidence, indirect evidence, pressure, Alfred Wegner, Pangaea, convection current, heat transfer, convection, conduction, and radiation Quiz on Earth's interior on Wed 10/21 OBJECTIVE: I will be able to explain Alfred Wegner’s ideas about continents. I will be able to describe different types of heat transfer DO NOW: Turn in Earths Interior HW. No HW=Pink Slip! Use notes to make 9 vocab flash cards: crust, continental crust, oceanic crust, mantle, lithosphere, asthenosphere, mesosphere, outer core, inner core

Earth’s Interior HW

Alfred Wegner and Convection Currents –Doc# Alfred Wegner - a German polar researcher, geophysicist and meteorologist Wegner’s Hypothesis: All the continents were once joined together in a single landmass and have since drifted apart. The continents were joined together about 300 million years ago in a supercontinent called Pangaea. I will be able to explain Alfred Wegner’s ideas about continents. I will be able to describe different types of heat transfer

Alfred Wegner and Convection Currents –Doc# What do you think of Wegner’s theory? Why do you think many people doubted his hypothesis? Do you think Wegener’s hypothesis seems possible? I will be able to explain Alfred Wegner’s ideas about continents. I will be able to describe different types of heat transfer

Alfred Wegner and Convection Currents –Doc# There are three types of heat transfer: radiation, convection, and conduction. I will be able to explain Alfred Wegner’s ideas about continents. I will be able to describe different types of heat transfer

Alfred Wegner and Convection Currents –Doc# Heat is constantly being transferred inside Earth When an object is heated, the particles that make up the object move faster = more energy The movement of energy from warmer objects to cooler objects is called heat transfer I will be able to explain Alfred Wegner’s ideas about continents. I will be able to describe different types of heat transfer

Alfred Wegner and Convection Currents –Doc# Heat Transfers Radiation – transfer of energy that is carried in rays (ex. sun warming skin) Convection – heat transfer by the movement of a fluid (ex. air currents) Conduction – heat transfer between materials that are touching (ex. feet on hot sand) I will be able to explain Alfred Wegner’s ideas about continents. I will be able to describe different types of heat transfer

Alfred Wegner and Convection Currents –Doc# conduction radiation conduction convection What other examples of heat transfer can you think of? radiation I will be able to explain Alfred Wegner’s ideas about continents. I will be able to describe different types of heat transfer

Alfred Wegner and Convection Currents –Doc# Convection current – the movement of a fluid, caused by differences in temperature, that transfers heat from one particle to another Heating and cooling of a fluid , changes in fluid’s density, and the force of gravity combine to set convection currents in motion I will be able to explain Alfred Wegner’s ideas about continents. I will be able to describe different types of heat transfer

Heating and cooling Change in density Force of gravity CONVECTION CURRENT

Alfred Wegner and Convection Currents –Doc# Heat from the core and the mantle cause convection currents in the mantle There are also convection currents in the outer core – causing Earth’s magnetic field I will be able to explain Alfred Wegner’s ideas about continents. I will be able to describe different types of heat transfer

Convection Currents in the Mantle Cold from Crust cools the rock. The rock becomes more dense and sinks in the Mantle. Crust Mantle COLD is more dense so it sinks. HEAT is less dense so it rises. Mantle Outer Core Heat from Outer Core warms the rock. The rock becomes less dense and rises in the Mantle.

Lava Lamps and Convection Currents Create a diagram of a lava lamp. Label the parts of the lamp. Illustrate the movement of the wax and label the direction of its movement. Explain the reason for the movement of the wax in the lava lamp.

Lava Lamps and Convection Currents Create a model that explains how a lava lamp is a convection current. How does the movement of the wax in a lava lamp compare to the movement of the rock in the mantle? (HINT: What three things set convection currents into motion?) I will be able to explain Alfred Wegner’s ideas about continents. I will be able to describe different types of heat transfer

Lava Lamps and Convection Currents Heating and cooling of a liquid Change in density of the liquid Force of gravity I will be able to explain Alfred Wegner’s ideas about continents. I will be able to describe different types of heat transfer

Lava Lamps and Convection Currents I will be able to explain Alfred Wegner’s ideas about continents. I will be able to describe different types of heat transfer