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