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Science

Quiz 2.4

TermDefinition
Conduction The flow of thermal energy through direct contact.
Conduction example Ironing, because the iron touches the clothes and passes on the thermal energy, or the handle of a pot gets hot because its touching the pot
Convection the flow of thermal energy through fluids (liquid, air or gas)
Convection example boiling water, or whenever air rises
Radiation energy transfer in electromagnetic waves
Radiation Examples Sunlight warming your face, campfire cooking a hot dog
Conductor materials that transfer thermal energy easily
Conductor examples Metals or Tile floors
Insulator materials that do NOT transfer thermal energy
Insulator examples Wood, rubber, cork, and natural fibers like hair, fur, wool and feathers.
Describe 2 factors that determine the type of thermal energy between two objects Contact and type of material
Would convection occur in a heated liquid? Explain Yes, because heating causes the liquid move and rise
Are there different ways that thermal energy can be transferred between objects? Yes, conduction, convection and radiation
Why can't thermal energy travel through space via convection? Because convection needs matter like liquid, air or gas to travel and there is no matter in space.
What types of thermal energy can occur if a pot of water is boiling on a stove? Conduction, because it is touching, convection because the fluids move and radiation because of electromagnetic waves
What is the thermal energy transfer that is responsible for cooking a hot dog over coals? Radiation
Imagine a raven perched high above in the tree as you are cooking the hot dog. What form of thermal energy transfer would keep the bird warm? Convection because warm air rises.
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