Answer:
In this experiment, you are instructed to cut fruits and observe any changes that occur when the fruits are placed in two different plates - one covered and one uncovered. This experiment is aimed at understanding physical and chemical changes.
Here is a step-by-step explanation of the procedure:
1. Gather the required materials: an apple, a knife, a plate, an orange, and a banana.
2. Cut each fruit, one by one, into smaller pieces using the knife.
3. Place all the cut fruit pieces in the first plate.
4. Take half of the fruit pieces from the first plate and transfer them to the second plate.
5. Cover the second plate with a lid or any other suitable cover.
6. Now, observe what happens in both the plates - the covered plate and the uncovered plate.
7. Record your observations. Pay attention to any changes that occur in both plates, or if the changes only occur in one of the plates.
To find the reason behind the changes observed, consider the following:
- Physical changes: These are changes that do not involve the formation of new substances. They usually affect the physical properties of the matter, such as shape, size, or state (solid, liquid, gas). Examples of physical changes could include cutting the fruits into smaller pieces or changing the state of matter (e.g., melting ice cubes).
- Chemical changes: These changes involve the formation of new substances with different chemical properties. Signs of a chemical change include the production of gas, a color change, the formation of a precipitate, or the release of energy (heat or light). Examples of chemical changes could include the browning of a cut apple due to oxidation or the fermentation of fruit juices.
Now, in your surroundings, you can find examples of physical and chemical changes:
- Physical changes: When you cut a piece of paper into smaller pieces, it is a physical change. Similarly, when ice melts and becomes water, it is also a physical change.
- Chemical changes: Cooking food is an example of a chemical change. When you heat raw ingredients, such as eggs or vegetables, they undergo chemical reactions that change their taste, texture, and appearance. Another example is burning wood, which involves a chemical reaction that produces heat, light, and ash.
Remember to record your observations accurately and think about the reasons behind the changes you observe.