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