Materials can be classified as useful or harmful depending on their intended uses and effects. Useful materials include food, medicine, cleaning products, and more. These materials must be properly disposed of to avoid pollution or harm. Some key points: - Materials are classified based on uses such as food, medicine, cleaning, etc. - Proper disposal is important to prevent pollution of water sources and harm to the environment. - Both useful and harmful materials must be handled carefully and disposed of properly.

1. PROPERTIES OF
MATTER
LESSON 1: Classify Useful Materials at Home

2. Materials at Home

3. Useful Materials
• Materials are classified according to their uses.
Useful materials can be classified as food products,
medicine, personal care, cleaning materials and
gardening or farm products.
• Will you give an example of useful materials in diff.
classifications.

4. Activity
Classify the ff. materials at home
Materials:
• shampoo face powder medicine tablet cereals
• bath soap tomato sauce canned goods bleach
• fish sauce dog food Baygon Mosquito Killer

5. Food
Products
Medicine Personal
Care
Cleaning
Materials
Pesticides

6. Guide Questions:
• 1. What materials in our activity are found at home?
• 2. What are the materials that can be found inside the classroom?
• 3. Give other examples of some useful materials.
• 4. Give some materials used for the following purposes:
• cooking - ______________________________
• cleaning - ______________________________
• eating - ______________________________
• gardening - ______________________________
• 5. List down all the useful materials in our activity.

7. Seatwork No.1:
Match Column A to Column B.
Column A Column B
1. cough syrup a. used as cleaning materials
2. toothpaste b. used for gardening and improved the
yield of crops
3. fertilizer c. used for killing unwanted pests and
insects
4. cereals d. it is used as medicine
5. Bleach e. used for personal care
6. f. used as food products

8. Assignment 1
Materials Classification
1.
2.
3.
4.
5.
List down five materials that you can find in your kitchen. Classify this
materials into useful or harmful materials.

9. Lesson 2: Harmful
Materials

10. Identify the ff. materials

11. Have you seen this warning symbols? What do they mean?

12. Harmful Materials
• Harmful materials are those that cause danger to
living things like alcoholic beverages and cigarettes.
Other materials become harmful when misused
like pesticides, insecticides, rodenticides and drugs.

13. Seatwork 3 Choose the letter of the correct answer.
Choose the correct answer.
1. What materials kill germs and prevent the spread of diseases?
a. solvent c. soap
b. fertilizer d. pesticide
2. Which of the following kills insect pest?
a. insecticide c. medicine
b. preservative d. soap
3. When do materials become harmful?
a. when misused c. when materials improved
b. when used carefully d. when it is efficient

14. 4. Why should use rubber gloves when washing dishes or clothes using
detergents?
a. To prevent skin irritation.
b. To better conserve water.
c. To avoid dirt or germ contamination.
d. To prevent the hands from getting wet.
5. Why should we control or regulate the use of aerosol sprays?
a. They are expensive.
b. They contain harmful ultraviolet rays.
c. They contain chlorofluorocarbons which destroy the atmosphere.
d. They contain flammable chemical which can bring accidental fires.

15. Assignment no.2
Look at labels of at least 3 cosmetics/products. Find out if there are
precautious on the use of those cosmetics. Copy the precautious and
submit your work to your teacher.
Ex.

16. Lesson 3: Useful Effects
of Some Materials in
our Daily Life.

17. There are materials which have useful effects in our daily
lives. Bathroom soap, shampoo and toothpaste are used for
personal hygiene.

18. Identify the ff. materials
paint insecticide pesticide shampoo a piece of wood
detergent soap paintbrush cleanser toothpaste
1. What materials do we use in cleaning and beautifying our home? personal
hygiene? gardening?
2. What are the useful effects of these materials in doing daily activities?

19. Seatwork 3 : Write the letter of the correct answer.
1. What is the effect of smoke from factories on plants?
a. plants bear more fruits
b. reproduction rate increases
c. plants produce good quality of fruits
d. plants cannot undergo photosynthesis
2. What happens when people throw waste materials into rivers?
a. water will polluted
b. oxygen supply will increase
c. microorganisms will be depleted
d. carbon dioxide in water will decrease
3. Why are pesticides, herbicides and insecticides useful?
a. they are expensive
b. they kill harmful organisms
c. they improve the health of people
d. they preserve the natural environment

20. 4. Why are chemical sprays harmful to the environment?
a. it affects the clouds c. it pollutes bodies of water
b. it destroy our clothes d. it destroys the ozone layer
5. Why are window grills painted?
a. to make the window grills weaker
b. to make the window grills smoother
c. to prevent the window grills from rusting
d. to keep the window grills much stronger

21. Identify the effects of
harmful materials on
one's health.

22. • Alcoholic drinks are beverages that contain ethanol or
ethyl alcohol. Alcohol is both a food and drug. When a
person takes in alcohol, it is the first thing that the body
uses. Most of the alcohol goes directly from the stomach
into the blood.
• Drinking alcohol beverages has bad effects on the
stomach, the liver, the brain, the heart and the nervous
system. It changes the behavior and mood of the person.

23. • Alcohol, cigarette and certain types of drugs are harmful to
people. Alcoholic drinks like beer and liquor can harm the body
and change a person's behavior. Cigarettes can damage the lungs
of a person who smokes. Drugs like marijuana and cocaine are
illegal. These drugs can damage body organs and change the way
a person thinks and acts.

24. Seatwork
Multiple choice
1. Why it is important to have a healthy body?
a. A healthy body is big.
b. A healthy body is beautiful.
c. A healthy body can never gets sick.
d. A healthy body can also produce a healthy mind.
2. Which of the following is the most practical and inexpensive way of
remaining healthy?
a. sanitation and sterilization c. promoting healthful living
b. using vaccines and drugs d. improving health services

25. 3. Why is exercise good for the body?
a. it relaxes the muscles
b. it makes the muscles thinness but longer
c. it makes the muscles contract and expand
d it helps the different muscles in the body become strong
4. To maintains healthy you should:
a. drink alcoholic beverage
b. use drugs
c. drinking coffee and carbonated drinks
d. eat a balance diet

26. 5. Some drunken person:
a. can think clearly and wisely
b. cannot think clearly and wisely
c. can perform activities well
d. can stay healthy

27. Choose the correct the answer.
1. What organ is most affected by nicotine?
a. eyes b. lungsc. stomach d. intestine
2. What harmful substance do cola contain?
a. tar b. caffeine c. alcohol d. nicotine
3. Which beverage contains the most caffeine?
a. tea b. coffee c. chocolate d. ginger brew

28. 4. What is the gas in cigarette smoke?
a. tar c. oxygen
b. nicotine d. carbon monoxide
5. What is the substance in tobacco that is a poison?
a. tar c. caffeine
b. alcohol d. nicotine

29. Harmful Effects of
Some Materials in the
Environment.

30. • While we are enjoying the beneficial effects of materials they have some
harmful effects on living things and the environment detergent, pesticides,
plastics, inorganic fertilizers, household and industrial wastes that go to the
rivers pollute water.
• Pollution: global warming, acid rain, and ozone depletion are some of the
harmful effects of chemical change to the environment.

31. • Global warming:
An increase in the earth's average atmospheric temperature that causes
corresponding changes in climate and that may result from the green house
effect.
• Pollution:
The presence in or introduction into the environment of a substance or thing
that has harmful pr poisonous effects.

32. • Acid rain:
Rainfall made sufficiently acidic by atmospheric pollution that is causes
environmental harm, typically to forests and lakes. The main cause is the
industrial burning of coal and other fossil fuels, the waste gases from which
contain sulfur and nitrogen oxides, which combine with atmospheric water to
form acids.
• Ozone Layer Depletion:
Ozone layer depletion, is simply the wearing out (reduction) of the amount of
ozone on the stratosphere. Unlike pollution, which has many types and causes.
Ozone depletion has been pinned down to one major human activity.

33. Seatwork
Match Column A with Column B. Write only the letter of the correct answer.
A B
1. prevent things from rusting a. insecticide
2. kill insects b. paint
3. kill pest that destroy crisp c. detergent
4. used for cleaning and washing d. soap
5. remove tough grease and stains e. pesticide
on clothes

34. Proper Disposal of
Materials

35. • Materials are useful when used properly. Always read the product label
before using any product. This will keep you away from harm and danger.
When we practice safety precautions, it shows that we value our life.
• • Proper disposal human waste is important to avoid pollution of water
sources.
• • Disposal must be done to avoid harming the environment mentor causing
harm to human death.
• • Waste should never be disposed down sinks, drains, lavatories, ditches, near
wildlife habitats ponds.
• • Products for disposal should not be mixed together and containers should
be clearly labeled.
• • Separate materials into bio-degradable and non-biodegradable.
• • Recycle some of non-biodegradable materials.

36. Seatwork
Below are the empty container of used products in your home and your family
wanted to dispose the following discarded materials. How will you dispose the
materials properly? Classify the products into their respective boxes shown
below.
toothpaste shampoo bath soap mothball
sardines corned beef lotion laundry soap
instant noodlesfruit juice bread cologne
soy sauce bleach hairspray spoiled hotdog
coffee dishwashing paste deodorant

37. Personal Care Food Products Household
Products
Cleaning
Products
Paint and
pesticides

38. 1. Which is not harmful to living things?
a. Organic fertilizer b. Inorganic fertilizer
c. Chlorofluoro carbons d. Industrial waste
2. Which of the following shows concerns for the environment?
a. Burning of garbage in open areas.
b. Participating in clean and green project.
c. Hunting wildlife in the forest.
d. Throwing waste water into the river.

39. 3. Which of the following should you follow?
a. Burning of garbage
b. Burying of garbage
c. Separating of garbage
d. Dumping of garbage
4. In which group does household garbage belong in?
a. hazardous wastes
b. non-hazardous waste
c. special waste
d. None of the above

40. 5. What causes waste disposal to occur?
a. too many people on land
b. the lack of water
c. too much waste thrown everyday
d. deforestation

41. 1. Which materials accounts for the greatest percentage of the weight of solid
waste?
a. food waste c. paper
b. plastic d. wood
2. What is waste disposal?
a. the placement of waste into or on the land
b. the increase in the Earth's average temperature
c. the release of dirty particles into the air from industries etc.
d. all of the above

42. 3. What are the effects of waste disposal to the Earth?
a. oxygen, tree and natural resources are wasted because forest are out down for
landfill of the waste.
b. contamination of soil
c. contaminated water, floods
d. all of the above
4. Which type of bag is general waste put into?
a. containers lined with black bags
b. contains lined with clear bags
c. sharp containers
d. containers lined with yellow bags

43. 5. What cause waste disposal to occur?
a. too many people on the land
b. the lack of water
c. too much waste thrown everyday
d. deforestation

44. Physical change

45. Physical change
•Physical change is a change in size, form,
or appearance with no new material or
substance formed. Changes to matter in
which no new kinds of matter are
formed.

46. • Brittleness - is the property of a material to be easily broken into piece.

47. Ductility - is the ability of a material to be
drown in a very fine wire without breaking.

48. Elasticity - is the ability of a material to
return to its original shape.

49. Flexibility - is the capability of matter to be
rolled or bent without breaking.

50. Hardness - is the resistance of a material
from being easily scratched.

51. Malleability - is the ability of materials to
pressed, hammered, or rolled into various
shapes, and sizes without breaking.

52. Porosity - means the ability to absorb or
hold much water or liquid.

53. Solubility - is the property of materials to
be dissolved in liquid.

54. SEATWORK
• Identify the property of the following objects. Choose the correct answer
inside the box. Write the letter of the correct answer on the space provided.
_____ 1. Can for the corned beef _____ 6. foam
_____ 2. Garter _____ 7. Jewelry
_____ 3. Copper Wire _____ 8. Glass Bottle
_____ 4. Skin _____ 9. Diamond
_____ 5. Egg Shell _____ 10. Coffee Granules

55. a. Malleability e. Brittleness
b. Elasticity f. Hardness
c. Flexibility g. Solubility
d. Porosity h. Ductility

56. Choose the correct answer. Write the letter only.
1. Which is a physical change?
a. air pollution c. evaporation of water
b. ozone depletion d. formation of acid rain
2. Is there a new material formed in physical change?
a. Yes c. Sometime
b. No d. Maybe
3. What change happens when liquid evaporate?
a. solid to gas c. gas to liquid
b. liquid to gas d. liquid to gas

57. 4. Which of the following shows a physical change?
a. roasting fish c. decaying garbage
b. melting of chocolate d. souring of milk
5. What kind of change is involved in the tearing of paper?
a. chemical c. physical
b. energy d. nuclear

58. 6. Which of the following shows a physical change?
a. roasting fish c. decaying of garbage
b. melting of chocolated. souring of milk
7. Which of the following best describes a physical change?
a. No new matter is formed.
b. There is a formation of new substance.
c. The substance looses the original properties.
d. The materials cannot be brought back to its original form.
8. Is there a new material formed in physical change?
a. Yes c. Sometimes
b. No d. Maybe

59. 9. What kind of change is involved in the tearing of old newspaper?
a. Chemical c. Physical
b. Energy d. Nuclear
10. Which of the following is NOT an example of a physical change?
a. chopping wood c. wine making
b. slicing of cake d. tearing of paper

60. • Matter can be changed from one form to another. Some changes make
matter look different. Other changes can make into another.
• In water made and become liquid when they are heated. This process of
changing solid to liquid is called melting. Sublimation is the process of
changing solid matter to gas without passing the liquid state. Freezing is
the change of liquid to solid. Evaporation is the change of liquid to
gas. Condensation is the change of gas into liquid.

61. Match Column A to Column B
Column A Column B
_____ 1. The change of phase of matter from a. sublimation
liquid to gas. b. freezing
_____ 2. The change in phase of matter from c. melting
solid to liquid. d. evaporation
_____ 3. The change in phase of matter from e. condensation
solid to gas.

62. _____ 4. The change in phase of matter from gas to solid.
_____ 5. The change of phase in matter from liquid to solid.

63. 1. Which is necessary in burning?
a. Heat b. oxygen c. fire d. match
2. Presence of oxygen is necessary during
a. Burning b. lightning c. changing d. buying
3. What is produce during burning?
a. Oxygen b. light c. heat d. fire

64. 4. Oxygen is necessary in all
a. Living things b. non - living thing
c. sunlight d. temperature
5. Gas is present in the
a. Atmosphere b. stratosphere c. exosphere d. mesosphere

65. Seatwork
1. Is caused by an increase in temperature.
a. melting b. freezing c. evaporation d. sublimation
2. When water is placed in freezer, it become:
a. solid b. liquid c. gas d. plasma
3. The process of changing liquid to solid is:
a. freezing b. melting c. evaporation d. plasma

66. 4. Some liquids like oil and melted butter become hard and
turn to ____ when cooled.
a. gas b. solid c. liquid d. plasma
5. The process of changing liquid to gas:
a. evaporation b. condensation c. sublimation d. freezing