Heat Transfer Mrs. Crabtree 2012-2013

Energy and Temperature Earth’s atmosphere is comprised of a variety of gases. These gases create a “blanket” that help keep Earth warm The molecules that make up gases are evenly spread throughout the atmosphere. The faster molecules move the ______ energy they have. Conversely, the slower molecules move the _______ energy they have.

Energy and Temperature Thermal Energy- The _____ energy of motion of particles in a substance. Temperature- The _______ amount of energy in each molecule of a substance. One of the most important elements of weather Air temperature is measured using a ________. Thermometers work by the liquid in them expanding and contracting. As the liquid expands the temperature __________. As the liquid contracts the temperature __________.

Temperature Scientists use the _________ scale to measure temperature. In the Celsius scale 0 degrees = ________ and 100 degrees= _________. The US uses Fahrenheit in which 32 degrees= _________ and 212 degrees= ________

Heat Transfer Heat moves from warmer objects to cooler object until equilibrium is reached. Transferred in three ways Conduction Convection Radiation

Conduction The direct transfer of heat from one substance to another. The item/material has to be touching something for conduction to work. Examples:

Convection The transfer of heat through a fluid. When a fluid is being heated the warm material rises because it is _______ dense and the cooler material sinks because it is _______ dense. A current is then started. Examples:

Radiation Transfer of heat by electromagnetic radiation. Cannot necessarily see it, but you can _________ it. Examples:

Assignment Complete, in complete sentences, questions 1-4 on page 51. Due the beginning of class Wednesday!!!!