Conservation Of Energy

Question 1

What is meant by the conservation of energy?

Answer 1

• total amount of energy in a closed system remains constant
• energy cannot be made or destroyed but can change from one form to another

Question 2

What is waste energy?

Answer 2

The energy that is not used by the device for its desired purpose, or not converted into the desired from

Question 3

What are 3 methods of reducing heat loss in a building?

Answer 3

1. Double glazing
2. Loft & wall insulation
3. Thicker walls

Question 4

What is a renewable energy resource?

Answer 4

Energy source which can be replenished as it is being used up

Question 5

What are 4 examples of renewable energy resources?

Answer 5

1. Wind energy
2. Hydro-electricity
3. Tidal energy
4. Solar Energy

Question 6

What are advantages and disadvantages of tidal energy sources?

Answer 6

ADVANTAGES:
-no greenhouse gases
-fairly reliable- tides occur twice a day
-cheap to run as tides are natural
DISADVANTAGES:
-dam may cause flooding
-it can cost a lot to install the required infrastructure

Question 7

What are advantages of solar panels?

Answer 7

• don’t cause harm to the environment
• renewable resources
• can be used in remote areas where other types of energy are less accessible