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