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