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