Which fruit is known for turning brown soon after it is cut?
AnswerApple
Cut apples brown as their exposed flesh reacts with oxygen.
Food · Facts & stats
Fresh facts & stats
7 fact-checked facts about fresh food, produce and fresh water, each with the reason behind it. 5 more are in today's round and join this page after it closes.
The basics
Most of Earth's water is found where?
AnswerIn the salty oceans
About 97% of Earth's water is salt water in the oceans.
Going deeper
What is the largest freshwater lake by surface area?
AnswerLake Superior
Lake Superior covers about 82,000 square kilometers.
Where do tomatoes tend to lose flavor if stored?
AnswerIn the refrigerator
Cold storage damages the compounds that give ripe tomatoes their flavor.
Which of these fruits keeps ripening after it is picked?
AnswerBanana
Bananas are climacteric and continue ripening; grapes and berries do not.
Expert level
Which enzyme causes cut apples to turn brown?
AnswerPolyphenol oxidase
Polyphenol oxidase reacts with oxygen to form brown pigments.
Which holds the largest share of Earth's fresh water?
AnswerThe Antarctic ice sheet
The Antarctic ice sheet holds most of the world's fresh water.
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