P7.2.4 - Walls And Insulation

Question 1

How do you keep your house at a constant temperature by using energy?

Answer 1

You need to transfer energy to your house so it can stay warm

Question 2

What does the rate at which energy is transferred through walls depend on?

Answer 2

The thickness of the walls
What they are made of
Difference in temperature on both sides of the wall

Question 3

If a house has thicker walls, will the heat get lost quicker or slower than a house with thinner walls?

Answer 3

Slower

Question 4

If a house has a high thermal conductivity, does it lose heat quicker or slower?

Answer 4

Quicker

Question 5

Do modern insulation materials have high thermal conductivities?

Answer 5

No

Question 6

What is aerogel used for?

Answer 6

Insulating space vehicles that travel through the atmosphere

Question 7

What does thermal conductivity tell you?

Answer 7

How quickly energy is transferred through a wall

Question 8

What does thermal conductivity depend upon?

Answer 8

Area, thickness and temperature difference of the wall