Source Of Electricity- Solar Cells Flashcards Preview

Science - Energy and Change - 2017 > Source Of Electricity- Solar Cells > Flashcards

Flashcards in Source Of Electricity- Solar Cells Deck (14):
1

What is our primary source of energy? (1)

The sun

2

Where is all source of energy originally from? (1)

The sun

3

Complete the sentence:
The sun is a ________ source of energy. (1)

Inexhaustible

4

True or false:
The sun is the least environmentally friendly source of energy.(1)

False

5

Why is the sun not our main source of energy? (2)

Solar technology is very expensive, also there is not always sun everywhere across the world.

6

What does sunlight consist of? (1)

Trillions of particles called photons.

7

Compare sunlight to an every day objects. (1)

Sunlight is like a bright yellow hose sending out trillions of photons.

8

What is a solar cell? (1)

A electrical device that converts sunlight into electrical energy.

9

What do solar panels mainly consist of? (1)

Hundreds of solar cells.

10

What is one of the main components a solar cell consists out of? (1)

A silicone

11

When you use solar cells, what causes the flow of electrons? (1)

Their reaction between silicone and photons.

12

Where is the energy stored that was generated by the solar cells. (1)

In rechargeable batteries.

13

We use solar panels as a personal source of energy. Where would we use solar panels on a large scale? (1)

On a farm.

14

True or false:
We sell some solar power to Eskom. (1)

True