2.materials found at home according to their uses.ppt2nd

Materials Found at Home

according to their Uses

Grade 3 SY 2013-2014Ms. Shirley Puaso-Valera

Key Questions1.How do we use matter

in our daily life?2.Why should I be careful

when dealing with different materials?

ObjectivesA.Observe and describe the

properties of household materials - physical properties- chemical properties

B. Use communications to inform others about the safe handling of chemicals.

Review of the past lesson

Changes in Matter

Name some objects found at home and

describe it and tell the use of

it.

Name some objects found at home and

describe it and tell the use of

it.

Show and TellNaming some of the different household chemical and materialsBleach - is a strong

and effective disinfectant, effective in killing bacteria, fungus and viruses.

Show and TellNaming some of the different household chemical and materialsCaution should be

exercised in the use of it. Improper use of bleach may reduce its effectiveness in disinfection and also lead to accidents which can be harmful to health.

Show and TellNaming some of the different household chemical and materials

Overuse of bleach or using a bleach solution that is too concentrated results in the production of toxic substances that pollute the environment and disturb ecological

Show and TellNaming some of the different household chemical and materials

Knife - is a cutting tool

Show and TellNaming some of the different household chemical and materials

fork - A utensil with two or more prongs, used for eating or serving food.

Show and TellNaming some of the different household chemical and materials

LPG (Liquefied petroleum gas) or simply propane or butane, is a flammable mixture of hydrocarbon gases used as a fuel in heating appliances and vehicles

Show and TellNaming some of the different household chemical and materials

Soap and detergent are useful for cleaning

Show and TellNaming some of the different household chemical and materials

Television has a number of uses. First of all, it makes it possible for us to see what is happening far away..

Show and TellNaming some of the different household chemical and materials

Television is a very fine medium of entertainment.

Show and TellNaming some of the different household chemical and materials We should avoid the

presentation of programmes that may spoil the taste , character and morale of people.

Collaborative ActivityActivty 5.2

Materials Found at Home

Problem: Are all the materials found at home useful?

Materials Needed: pictures of different materials found at home: microwave, electric toaster, kettle, cups, plates, spoons rake, shovel, grass cutter, electric mower, muriatic acid, insect spray

Collaborative ActivityActivty 5.2

Materials Found at HomeWhat to do: Classify the materials according to use.

Observation:Write the names of the materials in their proper column.

ObjectsFor cooking For cleaning For eating For gardening

Collaborative ActivityActivty 5.2

Materials Found at Home

1.Are al the materials useful? ________________2.Which materials can be harmful?____________3.Are these materials properly kept in your house?_________________________________4.Are they properly labeled in the cabinet?______ _______________________________________

Collaborative ActivityActivty 5.2

Materials Found at Home

Conclusion:All materials in the activity are ____________They can become harmful if ________________________________________________________________________________________

Activty 5.2 Materials Found at Home

Problem: Are all the materials found at home useful?Materials Needed: pictures of different materials found at home: microwave, electric

toaster, kettle, cups, plates, spoons rake, shovel, grass cutter, electric mower, muriatic acid, insect spray

What to do: Classify the materials according to use.Observation:Write the names of the materials in their proper column.

Objects

1. Are al the materials useful? _________________________________________________2. Which materials can be harmful?_____________________________________________3. Are these materials properly kept in your house?_________________________________4. Are they properly labeled in the cabinet?_______________________________________Conclusion:

All materials in the activity are _________________________________________________They can become harmful if _____________________________________________________________________________________________________________________________

For Cooking For Cleaning For Eating For Gardening

Sharing of the answers by

presenting the data

Discussion on the importance of reading

the label of the different chemicals or materials

found at home.

Effects of Some Materials on People1. Foods like vegetables, fruits ,

fish, meat and juice, give our body the nutrients it needs.Foods packed or canned like corned beef, sardines, fruit cocktails, and others should be check the ingredients or substances contained in the different materials and the expiry date of the products in the labels. You might be buying food without nutritional value.

Effects of Some Materials on People2. Preservatives

and additives are usually added to processed food.Ex: food coloring,flavor enhancers,monosodium glutamateMSG, and sodium nitrate.Eating too much chips and instant noodles can harm health

Effects of Some Materials on People

3. Vitamins make our body more resistant to sickness. Medicines like paracetamol are taken to relieve pain or treat diseases like headache and fever.Use these as prescribed by doctors.

Effects of Some Materials on People4. Liquid detergents are

used in washing clothes. Muriatic acid and other disinfectants are used for cleaning the toilet and the bathroom.

If not properly used they can cause respiratory diseases especially when it is inhaled.

These must be used as indicated in the products labels.

Effects of Some Materials on People5. Insecticides are

used to kill insects like mosquitoes, flies, and cockroaches.

If it is not used properly it can make us sick.

Products labels should be read before using them.

Harmful Substances Alcohol, cigarettes and certain types of drugs are harmful to people.It can damage the lungs, body organs and change the way a person thinks and acts.

Person should always say “NO” to harmful drugs to keep the body fit and healthy.

Role PlayingRead the precautionary measures in handling harmful substance on page 224-226.

Role play one of the precautionary measures.

Group presentation

Discussion on the different precautionary measures in handling

materials

Precautionary Measures in Handling Substances.1.Always read the labels of products before buying them.

Precautionary Measures in Handling Substances.2.Do not buy products without the expiry date.

Precautionary Measures in Handling Substances.3.Insecticides, muriatic acids, and disinfectants should be kept in places where children cannot reach them . Wear gloves and cover your nose and mouth with mask. Change your clothes and wash hands thoroughly after using chemicals.

Precautionary Measures in Handling Substances.4. Keep flammable items, like gasoline and kerosene away from the stove, fireplace and other sources of heat. They can catch fire easily.

Precautionary Measures in Handling Substances.5. Take only the recommended dose of medicines as prescribed by your doctor . Too much intake of medicines, or overdosage, is not good to the body.

Precautionary Measures in Handling Substances.6. Provide designated areas for different household items. Label all household items properly. Keep dangerous chemicals in locked containers.

Precautionary Measures in Handling Substances.

7. Dispose of used materials and dangerous substances properly.

Precautionary Symbols or signs

## capable of catching fire in the presence of spark or open flame under normal condition

…. Includes caustic and acid materials that can damage the skin and even metals

//Poisonous and infectious materials that can cause death or immediate injury when a person is exposed to a small amount

GeneralizationDue to modern technology , certain chemicals have been discovered and contained in the materials and substances around us.

Many materials and substances are useful at home , in school , and in industries, but they can be harmful if not used properly.

Matter plays an important role which is essential to our everyday life.

Valuing

Importance of reading product labels

proper handling of materials.

Evaluation

A. Fill in the blanks with the correct word from the list. (p.229-A)

A. Choose the best answer. (p.229-B)

Thank You