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Heat Transfer

SOL 6.4c

QuestionAnswer
Radiation Heat transfer by EM waves ( can travel through space)
Conduction Direct contact heat trasnfer (involving solids)
Convection Heat transfer by way of a fluid (gas or liquid)
Law of Thermodynamics Heat always travels from objects with higher temperatures to lower temperatures
Thermal Energy the total kinetic energy of all molecules in a substance
Convection Current A current created when warm water or air rises and cooler air or water sinks to replace it (cause of wind)
What happens to the density of water or air when it is heated? the density decreases
Warm air/water rising and cold air/water sinking is an example of which type of hea transfer convection
Name the type of Heat Transfer for each example: 1. Hot pavement heats the air above it 2. Heat from the Sun 3. Warm air rising in the atmosphere 1. Conduction 2. Radiation 3. Convection
True or False: Wind is caused by the Sun heating Earth's surface causing the warm air to rise. TRUE DAT!!!
Thermal Expansion when a substance is heated its molecules move apart causing it to expand (grow larger)
Why does warm air rise? heat causes the air molecules to expand and become less dense. it gains energy
Why does cold air sink? loss of heat causes the air molecules to contract and become more dense--it loses energy
How does the Sun heat the Earth's surface? through Radiation
How does the Earth's surface heat the air through Conduction
How does the air transfer its heat in Earth's atmosphere through Convection
How does the Earth's oceans and Mantle (molten rock under Earth's crust) transfer heat? through Convection
Which type of air rises? a. Warm air b. Cold air a. Warm air
Heat transfer causes this type of current in a fluid. convection current
What causes wind on Earth? convection currents caused by warm air rising and cool air sinking
What are three ways in which heat transfer from one place to another? radiation, conduction, & convection
Created by: romanomd
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