Energy transfer part 1

Energy transfer

part 1 - Conduction and Convection

Learning objectives:

1) Recall the differences in the states of matter (particle theory)

2)Learn the process of conduction in solids using the particle model

3)Learn applications of conduction in terms of thermal energy transfer from high temperature to lower temperature

4)Learn how convection occurs

Heat is transferred from high T to low T

Fill in the Blanks

Heat travels from ____ temperature to ___temperature.

Watch the video: 10 minutes!

https://www.youtube.com/watch?time_continue=3&v=kNZi12OV9Xc&feature=emb_logo

The video is also attached to the one note page for this lesson.

Ensure you write definitions of Conduction, Convection and Radiation in your books.

Multiple Choice

What is the "keyword" for convection?

• mass

• density

• matter

• volume

Multiple Choice

What is the "keyword" for Conduction?

• Wave

• Density

• Mass

• Contact

Multiple Choice

What is the best material for the heat to be transferred by conduction?

• Liquid

• Gas

• Solid

Multiple Choice

Do you think metals are good heat conductors?

• Yes

• No

Multiple Choice

Do you think insulators are good heat conductors?

• Yes

• No

Multiple Choice

What is the "keyword" for Radiation?

• Wave

• Heat

• Density

• Contact

Conduction

Solids are generally the best types of conductors:

–Heat passes through solids by conduction

–Metals are good heat energy conductors

•Insulators are bad heat energy conductors

•Liquids and gases are insulators

Particle theory

Conduction

Open Ended

How could you explain conduction by using the particle theory?

Multiple Choice

Why is a saucepan made of metal?

• Partciles are fixed and vibrate with heat

• Particles of metals are able to vibrate more than other materials

• Metals are insulators

• Metals are hard

Multiple Choice

Why does a wool jumper keep you warm ?

• Because wool is warm

• Because wool is a conductor

• Because wool is an insulator

• Because wool is a solid

Multiple Choice

Why does a tiles floor feel colder than a carpet floor on your feet ?

• Because the carpet is warmer

• Because the tiles floor is colder

• Because the tiles floor is a better heat conductor

• Because the carpet floor is a better heat conductor

Complete the questions on conduction

Read the short description

Convection (liquids and gases)

There is a "contact" between particles. The particles that are heated up become less dense because they are far apart, therefore they start raising.

Multiple Choice

Why doesn't a solid conduct heat by convection?

• Because particles cannot move

• Because particles cannot change density

• Because particles are solid

• Because particles are rigid

Convection (liquids and gases)