TOPIC 4: THERMAL PHYSICS

Question 1

How does thermal energy transfer

Answer 1

from regions of high temperature to regions of low temperature

Question 2

Properties of conductors

Answer 2

• Conductors are materials that allow the free flow of electrons from one atom to another
• They conduct electricity because of the free electrons present
• They can pass electricity through them
• Materials that are good conductors generally have high conductivity
• Most metals are good conductors

Question 3

Properties of Insulators

Answer 3

• Insulators won’t allow the free flow of electrons from one atom to another
• They insulate electricity because of the tightly bound electrons present within atom
• They cannot pass electricity through them
• Materials that are good insulators generally have low conductivity
  Example of insulators are glass, plastic and rubber

Question 4

Factors that affect the rate of conduction

Answer 4

it increases by:
- increasing the temperature gradient (temperature gradient)
- decreasing distance between particles (distance)
- increasing surface area (surface area)

Question 5

the effect of temperature on density on fluid