A) To add minerals to water B) To remove sediment and impurities from water C) To boil water D) To change the taste of water
A) Fine sand B) Cloth C) Charcoal D) Gravel
A) To add minerals to the water B) To filter out large particles C) To neutralize the water's pH D) To kill bacteria
A) To filter out smaller particles than gravel B) To add flavor to the water C) To disinfect the water D) To slow down the water flow
A) To add minerals to the water B) To make the water clearer C) To improve the taste of the water D) To filter out even smaller particles than coarse sand
A) To absorb chemicals and impurities B) To add carbonation to the water C) To make the water colder D) To add minerals to the water
A) Changes the water's color B) Removes odors and some pollutants C) Makes the water acidic D) Adds nutrients to the water
A) To make the filter look nicer B) To increase the water flow rate C) To make the filter heavier D) To prevent contamination of the filtered water
A) A wooden box B) A metal pot C) A glass bottle D) A plastic bottle or bucket
A) Based on color B) From finest to coarsest C) From coarsest to finest (gravel, coarse sand, fine sand, charcoal) D) In a random order
A) Save it for later B) Use it for cooking C) Drink it immediately D) Discard it
A) It only removes large parasites B) Yes, it makes water completely sterile C) No, it primarily removes sediment and some chemicals D) Yes, it removes all bacteria and viruses
A) Freezing the water B) Adding sugar to the water C) Adding salt to the water D) Boiling the water
A) Once a decade B) Regularly, depending on water quality and usage C) Once a year D) Never, it lasts indefinitely
A) Charcoal B) Gravel C) Bleach D) Sand
A) Its color B) Its weight C) Its porous structure D) Its hardness
A) Regular coal B) Ashes from a fireplace C) Plastic pieces D) Charred wood or coconut shells
A) It won't filter the water effectively B) It will clog the filter C) It can leach harmful chemicals into the water D) It will make the water taste bad
A) Cloth or cotton B) Aluminum foil C) Plastic wrap D) Paper towels
A) Reduces turbidity B) Removes some chemicals C) Removes all viruses D) Removes sediment
A) Mineral content B) Acidity C) Temperature D) Cloudiness or haziness
A) Compress the layers more tightly B) Add sugar to the water C) Clean or replace the filter layers D) Add more layers
A) Gravel size doesn't affect filtration B) Larger gravel filters finer particles C) Smaller gravel allows for faster flow D) Larger gravel allows for faster flow but filters less fine particles
A) Soak them in bleach B) Boil them C) Microwave them D) Rinse thoroughly with clean water
A) To activate the charcoal B) To make the materials heavier C) To remove air pockets and allow for even water flow D) To disinfect the materials
A) It may not remove all dangerous pathogens and toxins B) It can handle any level of contamination C) It will always make the water completely safe to drink D) It will always change the taste of the water
A) Dirty B) Salty C) Safe to drink D) Cloudy
A) A water testing kit B) A pH meter C) A microscope D) A container with a hole for drainage
A) Anywhere convenient B) Downstream near a town C) From a stagnant puddle D) As far upstream from potential pollution sources as possible
A) By attracting them to the charcoal B) By physically trapping them within the filter layers C) By chemically killing them D) It doesn't remove protozoa |