EXPERIMENT

1. One apple

2. Two small tomatoes

3. One hotdog

4. Baking soda

5. Salt

6. Knife

7. Scissors

8. Paper cups

9. Plastic wrap

10. Tape

11. Medical bandage

12. Papers

​

In the chemistry experiment, cut the apple into four pieces and the tomato into two halves, bury them in different paper cups containing salt, baking soda, and a mixture of salt and baking soda, and seal them with plastic wrap. Apples and tomatoes are naturally degradable materials and will not cause long-term pollution of the environment. Salt (sodium chloride, NaCl) is a mineral widely found in nature and is biodegradable, but large-scale mining may damage the ecological environment. The discharge of high-concentration salt solutions will affect aquatic organisms. Salt is also a good dehydrating agent, which can make food drier and more concentrated, delay the spoilage process of food, and increase its shelf life. Baking soda (sodium bicarbonate, NaHCO3) is widely used and environmentally friendly. It is an alkaline substance that can neutralize acidic substances in food and change the pH value of food. It is harmless to the environment and the human body, but it may consume energy and produce carbon dioxide during the production process. Paper cups are generally recyclable and partially biodegradable, but paper cups lined with plastic are difficult to degrade. Although plastic wrap can extend the shelf life of food and reduce waste, it is usually disposable and difficult to recycle, and harmful substances may be produced during the manufacturing and degradation processes. s are generally recyclable and partially biodegradable, but paper cups lined with plastic are difficult to degrade. The selection of these materials can help reduce the negative impact of experiments on the environment and cultivate environmental awareness, but factors such as material performance, cost, and experimental complexity must also be weighed.

​