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How to speed up the ripening process of bananas?

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Have you ever heard of any ways to speed up the ripening process of bananas? Let’s form groups of 3 to 4 students to find out how to do so.

[pic] Pre-experimental research and discussion

1) Buy and store bananas

Your group will need to buy a bunch of bananas for conducting the experiment. What should you consider when choosing the bananas? And what is the proper way to store bananas?

2) Causes of fruit ripening

When fruits ripen, a substance which speeds up the ripening and aging process of the fruits will be formed. Do you know what the substance is? Search the answer from the Internet.

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[pic] Conducting the experiment

In this experiment, we are going to store an unripe banana with two other kinds of food respectively and then put them in different eenvironments.

Materials and equipment

|Materials: |Equipment: |

|Greenish banana with similar degree of maturity　　　 |Transparent food container 1 |

|4 |Label 4 |

|Apple 1 | |

|_______________________ | |

|Another kind of food (e.g. orange) 1 | |

| |[pic] |

Procedure

1. Label each of the bananas from A to D.

2. Prepare the experimental set-ups as shown below and place them in cool and dry place:

|Set-up A |Set-up B |

|Put a banana in a food container |Put a banana in a food container with an apple |

|[pic] |[pic] |

| | |

|Set-up C |Set-up D |

|Put a banana in a food container with another kind of food (e.g. |Put a banana in open air |

|orange) you choose | |

|[pic] |[pic] |

3. Take a photo of each experimental set-up and describe the bananas’ appearance at day 0 (i.e. the day you set up the experiment).

4. For each of the following 4 days, record the change in appearance of the bananas. At the last day, take photos of each experimental set-up.

5. Compare the appearance of the bananas and draw a conclusion.

Results

1) Appearance of the bananas (50 marks)

| |Set-up A |Set-up B |Set-up C |Set-up D |

|Day 1 | | | | |

|Day 2 | | | | |

|Day 3 | | | | |

|Day 4 | | | | |

2) Photos of the experimental set-ups

Day 0 (the day to set up the experiment)

|Set-up A |Set-up B |Set-up C |Set-up D |

| | | | |

Day 4

|Set-up A |Set-up B |Set-up C |Set-up D |

| | | | |

Conclusion

According to the result of the experiment, which experimental set-up can speed up the ripening of the banana? Arrange their effectiveness in descending order. (10 marks)

Set-up ___________ > Set-up ___________ > Set-up ___________ > Set-up ___________

Discussion (10 marks)

1. What is the function of set-up D?

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2. What is the principle of speeding up the ripening process of banana in each experimental set-up?

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3. Are there any other factors affecting the rate of ripening process of fruits?

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Score /100

I’ve heard that putting a certain kind of food together with a banana can speed up the ripening process. But I’m not sure if it works.

Jasmine, do you know if there’re any methods to make this banana ripe more quickly?

Chloe

Jasmine

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håv…core of Part A /30

Buying tips for bananas

←

Storing tips for bananas

Score of part B： /70

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