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