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E.2 Thermal Energy & Heat Transfer

Practice Worksheet — name: ______________________ date: ____________

Formulas for this topic

Heat Energy Q=mcΔTQ = mc\Delta T

Section A — Multiple choice

A1. Through which process does heat travel from the Sun to the Earth?

  1. A Conduction
  2. B Convection
  3. C Radiation
  4. D Insulation

A2. Which material is generally the best thermal conductor?

  1. A Wood
  2. B Copper
  3. C Air
  4. D Glass

Section B — Short answer

B1. Distinguish between heat and temperature.

B2. Explain convection currents in fluids (liquids or gases).

Answer key

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Section A

A1: Radiation

A2: Copper

Section B

B1: Temperature is a measure of the average kinetic energy of the particles in a substance, while heat is the total thermal energy transferred from a hotter body to a colder body.

B2: When a fluid is heated, it expands, becomes less dense, and rises. The cooler, denser fluid sinks to take its place. This continuous cycle creates a convection current.