A) To remove sediment and impurities from water B) To boil water C) To change the taste of water D) To add minerals to water
A) Cloth B) Fine sand C) Charcoal D) Gravel
A) To add minerals to the water B) To filter out large particles C) To kill bacteria D) To neutralize the water's pH
A) To filter out smaller particles than gravel B) To add flavor to the water C) To slow down the water flow D) To disinfect the water
A) To add minerals to the water B) To improve the taste of the water C) To filter out even smaller particles than coarse sand D) To make the water clearer
A) To make the water colder B) To add minerals to the water C) To add carbonation to the water D) To absorb chemicals and impurities
A) Removes odors and some pollutants B) Makes the water acidic C) Adds nutrients to the water D) Changes the water's color
A) To make the filter look nicer B) To prevent contamination of the filtered water C) To make the filter heavier D) To increase the water flow rate
A) A glass bottle B) A wooden box C) A plastic bottle or bucket D) A metal pot
A) Based on color B) From coarsest to finest (gravel, coarse sand, fine sand, charcoal) C) In a random order D) From finest to coarsest
A) Drink it immediately B) Save it for later C) Use it for cooking 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) Adding salt to the water B) Adding sugar to the water C) Freezing the water D) Boiling the water
A) Once a decade B) Never, it lasts indefinitely C) Regularly, depending on water quality and usage D) Once a year
A) Gravel B) Bleach C) Charcoal D) Sand
A) Its color B) Its porous structure C) Its hardness D) Its weight
A) Plastic pieces B) Regular coal C) Ashes from a fireplace D) Charred wood or coconut shells
A) It will clog the filter B) It won't filter the water effectively C) It can leach harmful chemicals into the water D) It will make the water taste bad
A) Plastic wrap B) Paper towels C) Aluminum foil D) Cloth or cotton
A) Reduces turbidity B) Removes some chemicals C) Removes sediment D) Removes all viruses
A) Acidity B) Temperature C) Mineral content 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) Larger gravel allows for faster flow but filters less fine particles B) Smaller gravel allows for faster flow C) Gravel size doesn't affect filtration D) Larger gravel filters finer particles
A) Rinse thoroughly with clean water B) Soak them in bleach C) Boil them D) Microwave them
A) To disinfect the materials B) To activate the charcoal C) To make the materials heavier D) To remove air pockets and allow for even water flow
A) It will always make the water completely safe to drink B) It can handle any level of contamination C) It may not remove all dangerous pathogens and toxins D) It will always change the taste of the water
A) Dirty B) Safe to drink C) Salty D) Cloudy
A) A container with a hole for drainage B) A water testing kit C) A microscope D) A pH meter
A) Downstream near a town B) As far upstream from potential pollution sources as possible C) From a stagnant puddle D) Anywhere convenient
A) By physically trapping them within the filter layers B) It doesn't remove protozoa C) By attracting them to the charcoal D) By chemically killing them |