A) To remove sediment B) To kill harmful microorganisms C) To improve the taste D) To add minerals
A) 50°C (122°F) B) 75°C (167°F) C) 100°C (212°F) D) 150°C (302°F)
A) 5 minutes B) 1 minute C) 30 seconds D) 15 seconds
A) Increased B) Decreased C) Depends on humidity D) Stay the same
A) Water boils at a higher temperature B) The water is purer C) Water boils at a lower temperature D) The air is less dense
A) Aluminum B) Stainless steel C) Plastic D) Cardboard
A) Filter out sediment B) Chill the water C) Add salt D) Add sugar
A) Yes, all of them B) Yes, only chlorine C) Yes, most of them D) No
A) Let it cool down B) Add lemon C) Add ice D) Drink it immediately
A) Bacteria and viruses B) Microplastics C) Heavy metals D) Pesticides
A) Only bad odors B) Yes, always C) No, never D) Sometimes
A) In a clean, sealed container B) In an open container C) In direct sunlight D) In the refrigerator uncovered
A) 1 month B) 24 hours C) Indefinitely D) 1 week
A) Only electricity B) Only wood C) All of the above D) Only gas
A) Steaming gently B) Frothy on top C) Bubbling vigorously D) Still and clear
A) Boiling is better after filtering B) Cloudiness is irrelevant C) No, it's not safe D) Yes, boiling makes it safe
A) Boiling is not sufficient B) Boil it twice C) Just boil it longer D) Boiling will remove all contaminants
A) Removing harmful substances B) Adding flavors C) Making it colder D) Changing the color
A) No, never B) Makes it harder C) Partially D) Yes, completely
A) No, never B) Only if it has a special setting C) Yes, it's the best method D) Yes, but it may not be as effective
A) Faster boiling B) Uneven heating C) Higher temperature D) It's more energy-efficient
A) Hardness prevents boiling. B) Boiling has no effect on hardness. C) Boiling reduces some hardness. D) Boiling increases hardness.
A) Boil the water. B) Locate the water source. C) Filter the water. D) Add chlorine.
A) Multiple methods B) Filtering alone C) Boiling alone D) Adding iodine.
A) Lead B) Viruses C) Bacteria D) Protozoa
A) Improve the taste B) Add oxygen C) Prevent burns D) Increase purity
A) Rolling boil B) Gentle simmer C) Just starting to steam D) Completely evaporated
A) Adding sugar to the water B) Freezing the water C) Filtering the water D) Exposing the water to sunlight
A) To assess likely contaminants B) Source doesn't matter C) Because all sources are equally safe D) Because all water tastes the same
A) Camping stove B) Garden hose C) Shower head D) Swimming pool |