Useful and Harmful
Materials
Learning Competency with Code:
Identify the properties of
materials that determine their uses harmful effect. S5MT-Ia-b-1.6
B. Matching
Type: Match column A with column by writing the letter of the correct answer
before the number.
_______1. Toxic substance a. chemicals that react readily
with other chemicals
_______2.Reactive b.
are usually strong acids or bases and exist in almost
every workplace and home that can cause damage
every workplace and home that can cause damage
With something or if the chemical is digested or
Inhaled.
_______3.Explosive/ Flammable c. a substance that causes injury, illness
or death
_______4. Corrosive d.
material that ignites easily and burns rapidly
With a flame or combustible substances
_______5.Hazarddous waste e. any waste or combination of
wastes which may cause
Irreversible illness or death.
Generalization:
A product is harmful if it has at least one of the following properties:
a. Toxic—Poison or causes long-term illness (such as
cancer) Pesticides, paint thinners, many auto products and some cleaners are
toxic.
b.
Flammable---Burns easily. Paint, thinner and other solvents, and auto products
are the most flammable home products.
c. Corrosive—Eats through material (acid, for
example). Oven cleaners. Drain cleaners are common corrosive products.
Reactive--- Can spontaneously ignite 0r create
poisonous vapors when mixes with other products. Ex. Firecrakers. Bleach and
ammonia.
References:
Into the future Science and Health
Textbook 6 pp.-115-117
Answers Key:
1. Toxic- pesticides. Mothball, paint thinner
2. Corrosive- oven cleaners, toilet bowl cleaners,
auto batteries
3. Reactive- firecrackers, ammonia, bleach
4. Flammable- LPG, air freshener, solvent
B.
1. c
2. a
3. d
4. b
5. e
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