Year 9 Science · Unit 3 · Lesson 8

Conduction, Convection and Radiation

Foundation Worksheet

Name
Date
Class

Learning Goals

Warm Up

True or False? Fix the false ones

Circle T or F for each statement. If the statement is false, rewrite it correctly on the line below.

Convection occurs in solids because particles are tightly packed and can pass energy directly to their neighbours.

Correct it:

T
F

Radiation requires a medium to travel through, it cannot pass through a vacuum.

Correct it:

T
F

Metals are good thermal conductors because they have delocalised (free) electrons that can move rapidly and carry kinetic energy.

Correct it:

T
F

Only very hot objects like the Sun or a fire emit thermal radiation. Objects at room temperature do not radiate any energy.

Correct it:

T
F

Your Turn

Sort it!

Write each scenario from the pool into the correct column below. Some scenarios may involve more than one method, write them in all relevant columns and mark them with an asterisk (*).

Metal spoon heating up in hot soup Sea breeze along the Sydney coastline Sun warming your face through a window Boiling water rising in a saucepan Bare feet on a hot concrete path Campfire warmth felt from 3 metres away Hot air balloon rising Roof insulation batts in an Australian home A thermos flask keeping coffee hot Infrared heating panel on a bathroom wall

Conduction

Convection

Radiation

Show What You Know

1. Explain why wearing multiple thin layers of clothing in cold weather keeps you warmer than wearing one thick layer of the same total thickness. Use what you know about conduction, convection, and radiation.

Recall 2 marks

2. A student says "Heat rises, so the best place to put a heater in a room is near the ceiling." Identify the error in their reasoning and explain where a heater should be placed, and why.

Recall 2 marks

Wrap Up

In one sentence, what was the main idea of this lesson?

HSCScience · Year 9 Science · Unit 3 · Lesson 8 · Foundation Worksheet