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