WorksheetsEnvironmental impact of Pure Substances & Mixtures
Total questions: 20
Worksheet time: 10mins
Which of the following separation method is best for removing stones from sand?
filteration
sifting
distillation
Magnetism
The substance left behind after filteration is known as
filtrate
distilate
residue
waste matter
What is the difference between sifting and filteration?
the pores of a filter paper are larger than that of a sift
filteration is used to separate solids from liquid, sifting mostly used to separate solids from solids
sifting is done with a filter paper, filteration with a sift
If I want to find out what colours are in a dye which separation method can I use?
Magnetism
Distillation
Filteration
Paper Chromatography
When I boil a mixture of salt and water, Why does salt not evaporate with the water?
Because salt is a solid
because water has a higher boiling temperature
because salt has a higher boiling temperature
because salt is dissolved in water
Sarah mixed blue ink in water. She wants to separate both. What method should she use?
filteration
Paper Chromatography
Distillation
Magnetism
Which of the following is NOT one of the uses of distillation
Alcohol Production
Refining Sugar
Refining crude oil
Making essential oils
Which of the following is less invasive to the environment?
Open Pit Mining
Strip Mining
Cleaning coal results in water contamination
True
False
Which of the following is a residue from Metal Ore Production
Carbondioxide
Methane
Cyanide
Nitrous Oxide
Methane can be made less harmful by...
gas burning
storing underground
gas flaring
filters
Which of the following stage in Water Treatment Process requires introduction of bacteria?
Primary
Secondary
Tertiary
Which of the following stage in Water Treatment Process requires aeration?
Primary
Secondary
Tertiary
Which of the following stage in Water Treatment Process Uses UV light or Ozone gas to kill germs?
Primary
Secondary
Tertiary
Pesticide residues can cause cancer
True
False
A mixture of waste rock created as a result of nickel and copper smelting is called
slack
slag
waste rock
cyanide
Acid rain is produced because of the production of the following gas in the air
carbon dioxide
Nitrous Oxide
Sulphur
Ozone
Radioactive elements release radioactive waves for how many years?
100
10,000
1 day
forever
Nuclear waste can disposed off responsibly
True
False
Hazardous waste does NOT include the following
lead based paints
Batteries
light bulbs
clothing
