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Apple oxidation 4Minds A2 STEAM lesson
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If you put an apple in water after cutting it, will it stop it from browning?
 
Yes, it slows down the browning
 
No, it speeds up the browning
Why do apples turn brown when cut?
 
Because oxygen reacts with the apple’s enzymes
 
Because of sunlight
What does vinegar do to slow down apple browning?
 
It makes the apple’s surface more acidic
 
It freezes the apple
There are kinds of apples that turn brown slower than others.
 
True.
 
False.
How can you stop apples from turning brown after cutting?
 
By putting lemon juice on them
 
By leaving them in the sun
Which enzyme makes apples turn brown?
 
Polyphenol oxidase (PPO)
 
Amylase
What causes apples to turn brown after cutting them?
 
A chemical reaction with oxygen
 
The heat from the knife
What happens when you cut an apple and leave it in the air?
 
It turns brown
 
It gets sweeter
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