Energy

Question 1

What is the law of conservation?

Answer 1

Energy can never be created or destroyed

Question 2

How many types of energy are there?

Answer 2

9

Question 3

Name the nine types of energy stores.

Answer 3

Magnetic
Thermal
Chemical
Kinetic
Electric
Elastic potential
Gravitational potential
Nuclear
Light

Question 4

True or false: Energy cannot be transferred?

Answer 4

False

Question 5

What is another way of saying energy transferred?
A: ‘Joules’
B: ‘Work Done’
C: ‘Efficiency’
D: ‘Transducers’

Answer 5

B. Work done. For those who don’t know, a transducer is something that transfers energy. You cannot say energy transferred is work done

Question 6

What is efficiency?

Answer 6

How well a device transfers useful energy

Question 7

What is the equation for energy efficiency?

Answer 7

Useful energy output/ Total energy input

Question 8

What energy is often the waste energy?

Answer 8

Thermal energy

Question 9

Why is thermal energy the waste energy?

Answer 9

Often when friction happens, heat is produced and that heat is thermal energy.

Question 10

What is a lamp’s useful energy?

Answer 10

Light energy

Question 11

What is a transducer?

Answer 11

Something that can convert energy from on form to another

Question 12

What is an energy chain?

Answer 12

Something that shows us the flow of energy

Question 13

Can we see energy?

Answer 13

No, but we observe the effect of transferring it

Question 14

What two forms can we give energy efficiency as?

Answer 14

Percentage or whole number

Question 15

Finish the sentence: No machine can be ___ _______ efficient

Answer 15

100 percent

Question 16

How can we reduce friction?

Answer 16

We lubricate things

Question 17

How can we stop loss of heat?

Answer 17

Insulators

Question 18

Why do we need to reduce friction?

Answer 18

To making machines more efficient

Question 19

that we can reduce friction?What is one way

(not lubrication)

Answer 19

We can streamline objects to reduce friction