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