Zusammenfassung der Ressource
Thermal energy (Heat)
- How does it travel?
- Conduction
- Two
solids in
contact
- Molecules in
the hotter
move faster
than in the
colder.
- Convection
- Liquids
and
gases
- Circular
movement
- Radiation
- Through
space
- waves
- Thermal conduction
- Conductors
- Transfer
energy
easily
- ex: metal,
diamond,
graphite
- Insulators
- Don't
transfer
energy easily
- ex: glass,
plastic,
rubber,
wood
- Effects
- Melting
- A solid
becomes
a liquid
- Liquid
molecules
move
faster
than solid
ones
- Evaporation
- A liquid
becomes
a gas
- Gas
molecules
move very
fast
- Expansion
- With heat,
molecules
vibrate
- Some
materials
become
bigger
(expand)
- Chemical
changes
- Permanent
changes
- The change
can't be
reversed
- An omelette
can't become a
liquid egg again