Tema 4 - Electric energy Flashcards
What is a light pollution?
Too much artificial lighting in the night
How does light pollution affects humans?
1- Change sleep patterns of the mammals
2- Affects bat’s night vision
3- Affects human night
4- A brighter night affects to animal became prey
5- We can not to see a sky
What can you do to reduce the light pollution?
1- Only use garden light when it is necessary
2- Use only yellow light not blue or white
3- Put point light downwards no upwards
4- Do not use outdoor’s light in migration period
5- Turn off lights when you leave the room
What is the electricity?
It is a form of energy, it can be produce by renewable and non-reneweable
What is the composition of the atoms?
1- Electrons (negative)
2- Protons (positive)
3- Neutrons (neutral)
When an atom gains electrons what will be its charge?
Negative
When an atom gains protons what will be its charge?
Positive
an electron repels to ….
electron
an electron attract to ….
proton
What is a electrical conductors?
It is a material that allow electricity travel through
What is a electrical insulators?
It is a material that do not allow electricity travel through
Some electrical conductors?
1- Cupper
2- Silver
3- Aluminium
Some insulators conductors?
1- Plastic
2- Paper
3- Wood
What is a electrical circuit?
It is a path where the electricity flows
What are the components of a electrical cirucuit?
1- An energy source
2- A conductor
3- A load
4- A switch
Where do we use electricity?
1- At home
2- At School
3- At industry
4- Transportation
What are the source of electrical energy?
1- Renewabled
2- Non renewables
What are renewable energy?
1- Solar panels
2- Wind turbines
3- Hydroelectric plants
What are non renewable energy?
1- Fuel fossil
2- Thermal plants
3- Nuclear plants
How does electricity reach our homes?
1- Electricity is generated from a source (renewable / non renewable)
2- The electricity goes to the substation where a transformer increases voltage
3- The electricity with hight voltage travel long distance
4- The electricity arrive in a other substation where a transformer reduces voltage
5- The electricity leaves the substation and goes to the electrical providers
6- Electricity enter in our home
What is a robot?
It is a machine can be programed to do some task to make our lives easer.
Robots works with electricity
Examples robots?
1- Vacuum cleaner
2- Robotics legs
Advantages of robots
1- Robots can save time
2- They can do repetitive task quickly
3- The can be use in surgery
4- They do not need break when they work
Disadvantages of robots
