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WorksheetsScience 4 Reviewer First Quarter
Total questions: 25
Worksheet time: 13mins
What does this symbol mean?
Flammable
Explosives
Oxidising Agent
Corrosive
What does this Symbol mean?
Corrosive
Irritant
Poison
Carcinogenic
This hazard symbol means ......
explosive
flammable
toxic or poisonous
corrosive
What does this symbol mean?
release fume that can hurt eyes, nose and throat.
cause harmful radiation.
cause poisoning and death if swallowed
easily expolde.
What should you do if someone inhaled toxic gas?
Place your head under running water
Spit it out immediately
Move away from the gas for fresh air
Flush eyes vigorously with water
Ice Melting
Chemical Change
Physical Change
Which clue in the picture tells you that it is a chemical change?
Temperatre Change
Odor Change
Color Change
Which is an example of a different substance being formed?
glass breaking
metal melting
water freezing
wood burning
Apple core turns brown when it reacts with the oxygen in the air.
Chemical Change
Physical Change
Which of the following is a chemical change?
Breaking Glass
Molding clay into new shape.
Magnesium Burning
Melting chocolate.
Which of the following is a physical change?
Dissolving kool-aid in water.
Bread being toasted
Acid and metal reacting
Digesting an apple
What do you see in the picture?
Different food garbages improperly thrown
Different chemicals improperly dumped or thrown in a place
Containers with plastics inside
Metals that can explode when heated
How do chemicals affect our environment?
it can cause healthy environment
it can cause pollution
it can help preserve food
it can help us in resuing materials
How can pollution affects us?
it can help in reproducing of animals
it can cause many kinds of disease
it can help us clean the air
it can lessen waste in environment
What kind of pollution do you think happens in the picture?
Water pollution
Land pollution
Air pollution
Plastic pollution
What are the pollutants in the water pollution?
Grass and soil
Water and fish
Humans and plants
Garbage and used detergents
All practices are harmful to our environment, except
planting trees
burning of garbages
throwing of garbages in the river
improper dumping of chemicals
It releases toxic materials and makes the air we breath harmful to us and to our environment
washing clothes
drying of clothes
burning plastics
freezing water
Selling of empty bottles of soy sauce and vinegar
has useful effects
has harmful effects
no effects
none of these
Burning of garbages
has useful effects
has harmful effects
no effects
none of these
Which is NOT a type of pollution?
Water pollution
Air pollution
Land pollution
Food pollution
My mother’s car is leaking oil. She parked her car on my street and oil leaked onto the concrete. Last night it rained heavily and washed the oil into the storm drain. What kind of pollution resulted?
land pollution
water pollution
noise pollution
air pollution
What is pollution?
an unhealthy diet
global warming
is the process of making land, water, air or other parts of the environment dirty and not safe or suitable to use
lands, people and plants
This is an example of
Water pollution
Noise pollution
Air pollution
Water pollution
How does air pollution affect humans?
Humans will get super powers
Humans will get sick with diseases
Humans will live longer
Humans will not be affected
