1 / 16

HEAT / THERMAL ENERGY

HEAT / THERMAL ENERGY. Phase Changes -Melting, Freezing, Evaporation, Boiling, Condensation, Sublimation. http://www.brainpop.com/science/energy/temperature/. Temperature:. the measure of the average kinetic energy of the particles in an object.

inga-cooke
Télécharger la présentation

HEAT / THERMAL ENERGY

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. HEAT / THERMAL ENERGY

  2. Phase Changes -Melting, Freezing, Evaporation, Boiling, Condensation, Sublimation

  3. http://www.brainpop.com/science/energy/temperature/ Temperature: the measure of the average kinetic energy of the particles in an object absolute zero: the temperature at which molecular motion stops.

  4. Heat http://www.brainpop.com/science/energy/heat/ the energy transferred between objects that are at different temperatures Heat is always transferred from the object that has the higher temperature to the object that has the lower temperature

  5. When matter is heated, the molecules react by….. -Speeding up -Spreading out This is known as thermal expansion -The increase in volume (size) due to added heat. Thermal: heat Expand: to get bigger When matter is cooled, the molecules react by….. -Slowing down -Contracting

  6. Conduction Transfer of heat / energy through direct contact -Occurs best in solids

  7. Conductors Insulators Wood Metal Objects Glass Water Cotton Rubber Air

  8. Convection Transfer of heat / energy through liquids and gases -Involves circular currents based on density of cooler / warmer matter

  9. Radiation Transfer of heat / energy through open space -Radiate: To Give Off

  10. Light Energy radiated from the sun Only about half the energy from the sun reaches Earth. The other half is either reflected away or is absorbed by other factors

  11. The Greenhouse Effect Warming that results when solar radiation is trapped by the atmosphere; caused by atmospheric gases that allow sunshine to pass through but absorb heat that is radiated back from the warmed surface of the earth

  12. Brainpop greenhouse effect OZONE Ozone is a gas made up of three oxygen atoms (O3). It occurs naturally in small (trace) amounts in the upper atmosphere (the stratosphere). Ozone protects life on Earth from the Sun’s ultraviolet (UV) radiation. Pollution is depleting it – upsetting the natural balance of “good” ozone at the stratospheric level of the atmosphere

More Related