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