# Shared Flashcard Set

## Details

Section 2-2 Cards
Heat Transfer
19
Science
6th Grade
11/16/2009

## Cards Return to Set Details

Term
 thermal energy
Definition
 The total energy of motion in the molecules of a substance.
Term
 TEMPERATURE
Definition
 The average amount of energy of motion of each molecule of a substance.  It is the measure of how hot or cold something is.
Term
 THERMOMETER
Definition
 Measures Air Temperature (among temperatures of other things)
Term
 HOW DOES A THERMOMETER WORK?
Definition
 - When the liquid in the bulb of the thermometer heats up, it expands and moves up the tube. -When the liquid cools, it contracts and falls back down the tube.
Term
 What is the unit of measure for temperature?
Definition
 DEGREES
Term
 What are the two SCALES for degrees?
Definition
 Celsius Fahrenheit
Term
 What is the boiling point in Celsius?
Definition
 100 DEGREES
Term
 What is the boiling point in Fahrenheit?
Definition
 212 degrees
Term
 What is the freezing point in Celsius?
Definition
 0 degrees
Term
 What is the freezing point in Fahrenheit?
Definition
 32 degrees
Term
 -- Which temperature scale do most scientists use?
Definition
 CELSIUS
Term
 -- Which temperature scale do we use in the United States for weather?
Definition
 - Fahrenheit
Term
 HEAT
Definition
 The energy transferred from a hotter object to cooler one.
Term
 Name the 3 ways that HEAT is transferred
Definition
 1. Convection 2. Conduction 3. Radiation
Term
 RADIATION
Definition
 THE DIRECT TRANSER OF ENERGY BY ELECTROMAGNETIC WAVES.   EX. Heat from a campfire
Term
 CONDUCTION
Definition
 - The direct transfer of heat from one substance to another (need to touch - direct contact)   ex. Hot feet on the sand or driveway
Term
 CONVECTION
Definition
 The transfer of heat by movement of a fluid   (hot air rises, cool air sinks)   EX. Drying shoes over a radiator
Term
 How is the Troposphere heated?
Definition
 1. The Earth's surface absorbs solar energy (CONDUCTION) 2. Air near the Earth's surface is heated (by RADIATION) 3. The warm air rises into the Troposphere and as it cools it drops back down (CONVECTION)
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