set 1

Question 1

What is energy?

Answer 1

the ability to do work

Question 2

How is energy measured?

Answer 2

joules

Question 3

What is the conservation of energy law?

Answer 3

The law of conservation of energy states that energy can neither be created nor destroyed

Question 4

What is the difference between Energy transformation VS energy transfer

Answer 4

Energy transfer is the movement of energy from one location to another. Energy transformation is when energy changes from one type to another

Question 5

What is the problem with energy transformation? (why is it not 100%)

Answer 5

wasted energy occurs when energy is being transformed

Question 6

Explain the energy transformation when you turn on a fan switch

Answer 6

When we switch on a fan, the fan converts a significant portion of the electrical energy into kinetic energy of the fan blades. Some part of electric energy is converted into heat.

Question 7

What are the three types of heat transfer?

Answer 7

conduction, radiation, and convection.

Question 8

Explain how conduction, radiation and convection works

Answer 8

In conduction, heat transfer occurs between objects by direct contact. In convection, the heat transfer is done through gas or liquids. In radiation heat travels via waves

Question 9

What are some examples of conduction, radiation and convection?

Answer 9

Conduction: Heat transfers into your hands as you hold a hot cup of coffee.
Convection :Hot air rising above a fire.
Radiation: Reheating a cold cup of coffee in a microwave oven.

Question 10

Which one needs contact?

Answer 10

Conduction