
Water Filtration Techniques: From Aeration to Sedimentation
Interactive Video
•
Science, Chemistry, Biology
•
6th - 8th Grade
•
Hard

Patricia Brown
FREE Resource
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6 questions
Show all answers
1.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the purpose of shaking the bottle with dirty water?
To dissolve impurities
To aerate the water
To mix the alum thoroughly
To remove large particles
2.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the role of alum in the water filtration process?
To filter out impurities
To aerate the water
To form larger clumps of particles
To disinfect the water
3.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
During sedimentation, what happens to the particles in the water?
They settle at the bottom
They float to the top
They evaporate
They dissolve completely
4.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the correct order of materials added to the filter setup?
Fine sand, coarse sand, pebbles
Pebbles, coarse sand, fine sand
Coarse sand, pebbles, fine sand
Pebbles, fine sand, coarse sand
5.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
What is the main purpose of the sand and pebble filter?
To disinfect the water
To remove most impurities
To aerate the water
To add minerals to the water
6.
MULTIPLE CHOICE QUESTION
30 sec • 1 pt
Why is the filtered water still not safe to drink?
It contains dissolved gases
It has not been aerated
It may still contain harmful microorganisms
It lacks essential minerals
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