Mrs Giusti & 5/6 RG's Class Blog

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Why do Apples Turn Brown?

Watch the video ‘Why do Apples Turn Brown?’ and explain what happens. Make sure you give as much information as possible.

31 Comments

  1. Apples’ turn brown because of Oxidation. Oxidation is when the air reacts to different materials in this case the apples. The Oxidation reacts to apples then turns the apples brown.

  2. rust starts to happen with iron for example its the same with an apple s when the apple/iron meets oxygen and water at around the same time it will cause rust but foe an apple it will turn brown accept it doesn’t need to rain to get water onto the apple/iron because air allready has little tiny microscopic bits of water in it so you would have to do something to stop rust like putting paint on it but with apples think some kind of wrap around it.

  3. Apples go brown is because if you bruise the apple the skin opens up like when we have a cut on our body it opens up and in a apple when there is a open whole all the oxygen comes into the tissue in the apple and that causes the apple to bruise and go off.

    • rfortuna

      November 5, 2016 at 9:41 am

      Jemma, you need to re-read this response – make sure you have the correct information from the video and you proof read your writing before publishing.

  4. ~What Do Apples Turn Brown?~
    Apple are like cars when it comes to rust and turning brown. The reaction of chemicals mixing together such as water and oxygen is called Poly-Phenol Oxidase (PPO) It’s the reaction when the PPO is exposed to oxygen and the iron inside the fruit which causes the apples to turn brown when the skin of the fruit is exposed to the chemicals.

  5. Apples go brown because of the oxidation. Oxidation is the chemical reaction that happens when oxygen reacts to different materials. Whereas for fruit like apples in this instance, oxidation happens because of this thing called enzyme known as PolyPhenol Oxidase (PPO). When the skin of the fruit is broken or bruised, that reaction happens because that makes it visible that the fruit has reacted to oxygen. Oxidation can be unreliable and dangerous.

    Thanks for reading
    Grace

  6. The apple is turning brown because it is being exposed to oxygen and PPO (Polyphenol Oxidase). This is a chemical reaction called Oxidation. PPO is an enzyme that breaks down the molecules in the apple when exposed to oxygen and that is a chemical reaction to make the apple turn brown.

  7. Apples turn brown because the apple is exposed to oxygen and water which reacts to PPO (a chemical in the apple). We notice this as the apple turns brown, this can only happen when the skin of the apple has been peeled off or browsed.

  8. Apples turn brown because of something called Oxidation, Oxidation is when Oxygen reacts to the material of an object such as tissue of fruit or like when cars rust, that is because of Oxygen and Water. But for fruit it is different, Oxidation happens because of an enzyme (enzymes are a substance that can build up or break down other molecules without undergoing any change) called Poly-phenol Oxidase (PPO). When PPO is exposed to oxygen and the iron inside of a fruit, it will cause a reaction, and we notice the reaction as the fruit turning brown and that only happens when the skin of the fruit is cut because that exposes the fruit to oxygen. 🙂

  9. Why do apples turn brown?

    Apples turn brown because it is being exposed to PPO and the car is being exposed to Iron oxide both are caused by a chemical reaction causing it to rust
    Angus

  10. Why Do Apples Turn Brown?
    What do apples have in common with a car? What apples and cars have in common is something called oxidation. Oxidation of a car is when the iron in the car reacts to water and oxygen. This forms iron oxide.
    The oxidation of an apple is the tissue of the fruit reacting to water and oxygen. Oxidation can also happen when the fruit is broken or bruised, because that exposed the fruit to oxygen.

  11. Why Do Apples Turn Brown?
    Apples turn brown because of PPO (Polyphenol Oxidase) which is an enzyme. When the iron in the fruit is exposed to oxygen it causes a chemical reaction called Oxidation. This makes the apple turn brown. This chemical reaction can only happen when the skin is broken off the apple, because that is when it is exposed.

  12. Why do apples go brown ?
    Well apples go brown because of Ployphenol Oxidase or PPO and that relates to Oxidation which is the same thing as what happens to cars when they rust.
    This is a reaction with the chemicals and you can see the reaction when you cut the apple open and inside is brown because the apple in exposed to oxygen.

    pun of the day: i would tell you a chemistry joke but I know I wouldn’t get a reaction.

  13. The reason apples turn brown is because when Poly phenol Oxygen (PPO) is exposed to to oxygen the iron inside the fruit causes a reaction making the apples go brown. This only happens when the skin of the fruit is broken or bruised which exposes the apple to oxygen.

  14. The reason apples turn brown is because they are left out in the oxygen (air) and they turn brown. If you think of it as like a car. When a car is out in the weather, water and heat, it then turns all rusty over time because you have left it outside and the car goes yellow and orange. Apples are exposed to the air and the Polyphenol Oxidase (PPO) which breaks the molecules inside and then the apple then turns brown. I never thought about comparing it to a car until I watched this video.

  15. Why do apples turn brown?
    Apples turn brown because of the oxidation. Oxidation occurs because of the chemical reaction that reacts with different materials such as the tissue in the apple. PPO (Polyphenol Oxidase) is the iron that is in the fruit that is exposed to oxygen.

  16. The reason apples turn brown is because the iron inside them forms together with the oxygen around the world then it starts to rot and change its yellow inside color to a yucky moldy brown this is the same as a car it can get rusty and turn brown and make your car look bad , I never thought that an apple can can have iron that turns into a brown color

  17. Why do apples turn brown?
    Apples turn brown because of a chemical called Oxidation. Oxidation is when oxygen reacts to different materials, such as the tissue in apples and the rust on cars. Rust appears by a chemical reaction caused by water and oxygen. When an apple turns brown it would have gone through polyphenol (ppo), which is when an apple is exposed to air and water. That causes a chemical reaction and the chemical reaction causes apples to turn brown when exposed to air and water.

  18. The reason apples turn brown is because the iron in the apple is reacting with oxygen around it. Due to the reaction the apple gets a yucky yellow and brown colour. When the apple turns brown it is the same concept as the car rusting. They both have iron in them and that’s why they go brown.

  19. Apples turn brown because of a chemical reaction called oxidation. This is when oxygen mixes with other materials such as the tissue of the apple causing it to go brown. This only happens when you cut the skin of the apple because this lets in the oxygen which mixes with something called PPO in the apple and makes it go brown.

  20. Apples turn brown when the fruit is exposed to different materials. This is called oxidation, the same thing happened when the car was exposed to water and oxygen. this is a reaction called PPO for short.

  21. Apples turn brown when the fruit is exposed to different materials. When the iron of the car is exposed to the iron in the apple.This is called oxidation, the same thing happened when the car was exposed to water and oxygen. this is a reaction called PPO for short.

  22. Apples go brown when something called oxidation occurs, oxidation is when oxygen & water make contact to the apple the same thing happens to a car when iron makes contact with oxygen & water.

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