Renewable Energy Sources #2

Question	Answer
What does Hydroelectric power use?	Falling water
What does Hydroelectric power usually require to work?	The flooding of a valley by building a big dam
Give three advantages of using Hydroelectric power.	1) Its reliable 2) There's no fuel and minimal running costs 3) It can provide an immediate response
Give three negatives about Hydroelectricity.	1) It has a big impact on the environment 2) They look bad 3) Initial costs are high
How does Hydroelectricity work?	Stored water is passed through a turbine, causing the generator to move, therefore providing electrical energy to the national grid
What is pumped storage?	A way of storing energy that has already been generated
What is a pump on a hydroelectric dam?	After the water passes through the turbine, it collects back into a secondary reservoir. This is then pumped back into the main reservoir at night, so its all saved and used efficiently

Resource summary

	Created by Adam Collinge about 10 years ago