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