science3Q3W7

science3Q3W7

By Arlene Picart

Sources and Uses of Electricity in Everyday Life

Learner's Module in Science 3 Quarter 3 ● Module 7

​Learning Competency Code S3FE-III-b-2 Learning Competency Sources and uses of electricity in our daily life

LEARNING OBJECTIVE At the end of the module, you should be able to describe the sources and uses of electricity in our daily life. S3FE-III-b-2

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What’s In

Electricity is a form of energy like light, heat and sound. It may come from batteries or an electric power plant or power stations. In this chapter, we will learn the different sources and uses of electricity and how it can be used safely in our homes? Look at the picture below, where do you think our electricity come from?

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What is It

Electricity is a form of energy that makes electrical objects move or change in response to the electricity flowing through them.

This happens when the electricity flows from an energy source, such as a battery or an electric circuit, to an electrical object. Electricity is one of the most important forms of power and energy that people use. You use electricity in doing your daily activities.

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Uses of Electricity

At home, we use many devices, tools and equipment that facilitate the conversion of electrical energy into other forms. In doing so, we are benefited enormously because electrical energy enables us to perform many activities.

Moreover, electricity is used every minute.

You use electricity from the time you get up in the morning until you go to bedat night, or even while you sleep.

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To use electricity, we must control its flow.

Electric circuitschannel the flow of electric current.

Electric Circuit needs a source of electricity such as battery, a solar cell, or a generator.

Batteries and solar cells are useful for small portable devices. They are also used in cars and other vehicles that do not have continuous connection to a stationary power supply.

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However, most electricity we use in our homes, factories and other offices is supplied by generators.

The generators inpower plants produce electricity that travels over power lines.

This electricity is fed into the homes through wires that run through walls. Electricity is very useful in our daily life.

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How electric energy is produced?

Atoms are basic units of matter. Atoms are made up of electrons, protons and neutrons.

An electron has a negative electric charge. A proton hasa positive electric charge. A neutron has no charge. An atom holds its protons and neutrons tightly, but electrons can move freely. Sometimes an atom loses electrons. Then the atom has more protons than electrons, giving the atom a positive charge. Sometimes an atom gains electrons from other atoms. Then an atom has a negative charge.​

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Two objects with opposite charges pull on each other. This pushing and pulling is electric force. This electric force holds the atoms in your own body together. Rubbing two objects together can cause electrons to move from one object to another. This movement of electrons is electricity. Observe the cat’s hair; your hair probably stands up when you comb it on dry days. When you pull a comb through your hair, electrons move from atoms of your hair pull toward each other. At the same time, the charges of your hair push on each other, and your hair move apart.

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Sometimes electron jumps through air from one object to another. Then you see a spark.

This spark is a form of electricity.

The lightning is agroup of very large sparks.

During a storm, some parts of a cloud gain many electrons.

The negative charges can jump through the air as lightning. When you rub your shoes on a rug, you pick up extra electrons from the rug.

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TOP 10 RULES TO ELECTRICAL SAFETY

To play it safe around your home, just remember the rules and safety precautions in handling electricity.

1. Do not plug too many cords on an extension outlet. This may cause overloading that damages electrical systems.

2. Ensure that all electrical cables are rolled and tucked properly, as pets and unwanted pests may nibble on these cords.

3. Do not try to climb electrical posts. seek help from able people like firemen or linemen if you need to retrieve some things that got caught up on these places like kites, balls etc.

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4. Pull out electrical plugs from sockets gently. Yanking electrical cords out of sockets may damage the appliance or cause electric sparks.

5. Stay away from power lines. Do not fly kites or play ball near electrical posts and towers to and shocks.

6. Ask assistance from an adult you need to use electrical equipment.

7. Avoid working near electrical wirings.

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8. Inform your elders at home about unprotected electrical outlets to have them warned about potentials risks of defective electrical equipment.

9. Also warn them to watch out for the hanging electrical cables and the power lines when climbing up ladders.

10. Place you electric appliances and electrical equipment away from moisture or wet places and put them in storages with regulated temperatures.

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TRUE or FALSE

Some things need electricity to work. They get their electricity from batteries, electric socket or from a power supply.

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Multiple Choice

yoyo

• true

• false

• none

• none

Multiple Choice

washing machine

• true

• false

• none

• none

Multiple Choice

fan

• true

• false

• none

• none

Multiple Choice

electric fan

• true

• false

• none

• none

Multiple Choice

radio cassette

• true

• false

• none

• none

Multiple Choice

seesaw

• true

• false

• none

• none

Multiple Choice

computer set

• true

• false

• none

• none

Multiple Choice

flag

• true

• false

• none

• none

Multiple Choice

blender

• true

• false

• none

• none

Multiple Choice

Removing the plug if appliance are not in use

• true

• false

• none

• none

Multiple Choice

Inserting plug with wet hands.

• true

• false

• none

• none

Multiple Choice

Switching off lights when not in use

• true

• false

• none

• none

Multiple Choice

Inserting too many devices into electrical cord

• true

• false

• none

• none

Multiple Choice

Turning on the television while sleeping.

• true

• false

• none

• none

Multiple Choice

Don’t touch exposed wires.

• true

• false

• none

• none

Multiple Choice

Ask an adult for help when using electrical equipment.

• true

• false

• none

• none

Multiple Choice

Keep electrical equipment away from water.

• true

• false

• none

• none

Multiple Choice

Tell an adult to put safety caps on all unused outlets.

• true

• false

• none

• none

Multiple Choice

Which of the following materials is run by a battery?

• Washing Machine

• television

• flashlight

• comuter

Multiple Choice

Ana saw that the wire of their television was nibbled by a rat.

What do you think should Ana do?

• just leave it there

• inform her parentsthat the wire of their T.V. was nibbled

• she will repair it

• she will look for the rat that nibbled the wire of their T.V.

Multiple Choice

It has a positive charge.

• proton

• neutron

• atoms

• electron

Multiple Choice

Which of the following is a safety precaution in handling electricity?

• Inserting other objects in an electrical socket.

• Touching a switch with a wet hand.

• Connecting too many appliances into one extension cord.

• Keep electrical equipment away from the water.

Multiple Choice

Electricity powers most of the things we use in our daily activities but, if we don’t use it properly it may harm us. Which of the following is the proper way of handling electricity?

• Touching exposed wires.

• Keep electrical equipment near from water.

• Pull an electrical cord from the wall.

• Ask an adult for help when using electrical equipment

​CONGATULATIONS!!!! JOB WELL DONE