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