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WorksheetsPBT. 1.2 - Useful and Harmful Materials
Total questions: 20
Worksheet time: 13mins
Which of the following materials can be considered as harmful?
What kind of substances can be found in most appliances and cars that may harm the Earth by contributing to global warming?
Chlorofluorocarbon
Chlorinefluorocarbon
Chlorofluorinecarbon
Chlorofluorocarbonine
Bleach can be corrosive but _____ can be an alternative for this.
baking powder
chlorine
vinegar
lemon juice
Ioannis found a lot of ants marching around their pantry. He wants these ants to back off but without the use of any insecticide. Which of the following alternative materials can you suggest?
Baking powder
Soy sauce
Salt
Lemon Juice
All of the materials below are considered as "desirable materials" EXCEPT _________.
Materials are generally (a) but they can be harmful depending on the use and situation.
(a) can be found in paints and gasoline which can be toxic to humans.
(a) materials are those that serve more than its purpose. It can be classified into vital, essential, and desirable materials.
Old thermometers have (a) inside them which is very dangerous when inhaled or ingested.
One alternative material that can remove bad odors in a small area is (a) . It can also be used to whiten some parts of our body.
A material can be harmful when they cause pollution.
TRUE
FALSE
If there's a label that says "harmful when inhaled" it means that this substance is harmful when eaten.
TRUE
FALSE
A smart phone can be considered as harmful since most of them are durable and serves more than its purpose - taking pictures, gaming, calendar etc.
TRUE
FALSE
Batteries contain lead that may be toxic to humans.
TRUE
FALSE
Things that are highly flammable and combustible can be harmful to humans.
TRUE
FALSE
Check all of the possible characteristics of a useful material.
Durable
Fragile
Resist corrosion
Flexible
Has toxic substances
Click all of the categories of a useful material.
Desirable
Medicinal
Vital
Essential
Cleaning
Click all of the harmful substances that may be found at home.
Soy sauce
Lead
Lemon Juice
Vinegar
Mercury
What makes a material harmful?
When it causes pollution.
When it is very hard.
When it is durable.
When it possess toxic substances
Vitals materials are those with great worth and are hard to throw away. Click all of the vital materials below.
