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Chapter 2 Weather Factors Section 2 Heat Transfer
How Heat is Transferred Heat is transferred in 3 ways: radiation, conduction, and convection.
How Heat is Transferred Heat is the energy transferred from a hotter object to a cooler one.
Radiation Radiation is the direct transfer of energy by electromagnetic waves.
Radiation You can’t see it, but you can feel it.
Radiation Examples: sun’s rays, campfire.
Conduction Conduction is the direct transfer of heat from one substance to another substance that it is touching.
Conduction Solids conduct heat better than liquids or gases (molecules are closer together).
Conduction Examples: walking on hot sand, touching a hot pot.
Convection Convection is the transfer of heat by the movement of a fluid.
Convection Examples: steam furnace, boiling water.
Heat Transfer in the Troposphere Radiation, conduction, and convection work together to heat the troposphere.
Heat Transfer in the Troposphere 1. Earth’s surface absorbs solar energy and is heated by radiation.
Heat Transfer in the Troposphere 2. Earth’s surface reradiates heat and warms the lower troposphere by conduction.
Heat Transfer in the Troposphere 3. The heated air molecules move faster making the warm air rise and the cold air sink. This creates convection currents which move heat throughout the troposphere.
. Earth’s surface is heated by radiation. Earth’s surface reradiates heat. Lower atmosphere is heated by conduction. Warm gases rise, cool gases sink = convection. HEATING THE TROPOSPHERE
The Greenhouse Effect When Earth’s surface is heated, it radiates some of the energy back into the atmosphere.
The Greenhouse Effect Most of this energy can’t travel back into space so is absorbed by gases in the atmosphere.
The Greenhouse Effect These heated gases form a “blanket” around Earth that holds heat in the atmosphere.
The Greenhouse Effect Greenhouse effect is the process by which gases hold heat in the air.
The Greenhouse Effect The greenhouse effect is a natural process that keeps Earth’s atmosphere at a comfortable temperature for most living things.
Methods of Heat Transfer Definitions Examples Comparison to heat transfer on Earth that effects weather.
Chapter 2 Weather Factors
The Transfer of Heat Energy.
ENERGY FROM THE SUN Chapter 14.3 Pages Energy in the Atmosphere The sun is the source of ALL energy in our atmosphere. Three things that can.
Solar Energy and Heating the Atmosphere. Radiation Energy comes from the sun as radiant energy Radiation from the Sun can be visible (light) or invisible.
Chapter 2 Section 1 The sun provides nearly all of the energy which powers the atmosphere. That energy comes to us in the form of electromagnetic.
Heating the Atmosphere Radiation Conduction The Earth receives its energy from the sun through radiation The transfer of energy as electromagnetic waves.
The Atmosphere B3: Weather Factors Part 1 – Energy in the Atmosphere.
16-2 Heat Transfer. (pages 548–551) 1
CHAPTER 14 Energy in the Atmosphere Section 1, pages
Heat Transfer. Energy transfer from a HOTTER object to a COOLER one.
Heat Transfer. How is heat transferred? (3 Ways) Examples:
Conduction, Convection, and Radiation. Heat Energy Energy is what makes things happen. All materials are made of tiny particles called molecules. Molecules.
Heat Transfer Chapter 2, Section 2 p How Heat is Transferred Heat: the energy transferred from a hotter object to a cooler one.
Key Idea #14 There is a relationship between the warming of the Earth’s atmosphere by the sun and convection within the atmosphere and oceans.
How many ways are there to transfer heat? How can thermal energy (heat) be transferred?
Radiation, Conduction, Convection. Heat Transfer Processes 1._____________ - Sun heats Earth’s surface in the form of rays or waves 2._____________.
Heat Transfer. Heat transfer Everything is made of molecules. When molecules gain energy they move faster and create more heat. (The faster the molecules.
Solar Energy Heat and Light. Energy Can take many different forms –____________ –Heat –____________.
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