| Thermal Energy | Thermal conduction | Solid, Liquid and Gas |
|---|---|---|
|
The particles will vibrate vigorously and move faster.
What will happen to the particles if they receive heat energy?
|
Conduction is the process of heat transfer from higher to lower temperature through medium without the movement of the medium particles.
What is conduction?
|
Gas
Which state of matter that the particles move freely and randomly?
|
|
The more heat energy received by the particles so the more kinetic energy gained.
Explain the relation between heat energy and kinetic energy.
|
copper, aluminium and iron
Give three examples of good conductor.
|
solid
Which state of matter that has the closest distance of the particles?
|
|
The gaps are used by metal bridges as a room to expand.
Explain why in the ends of bridges there must be gaps.
|
glass, water, plastic, rubber and wool
Give four examples of insulator.
|
The particles of solid will just vibrate vigorously but no flowing while the particles of liquid will move slide to each other.
Explain the difference when the particles of solid and liquid received heat energy in the same time.
|
|
In water, the particles are close together. But in ice, the molecules link up in a very open structure that usually takes up more space than in liquid.
Explain why water expands on freezing.
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1. Reduce the length of the object.
2. Increase the cross-sectional area of the object. 3. Increase the temperature difference on the ends of the object
Give a suggestion to increase the rate of thermal energy in an object.
|
Boiling point is 100 C
Freezing point is 0 C
What is the boiling and freezing point of water?
|
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