1. Cooking: When you cook, you often change the substance of food. For example, when you fry an egg, the heat changes the raw egg into a cooked one.

2. Rusting of Iron: This is a common example of a substance change in everyday life. When iron is exposed to moisture over time, it reacts with oxygen in the air to form iron oxide, which we commonly refer to as rust.

3. Ripening of Fruits: The ripening of fruits is another example of a substance change. As fruits ripen, their color, taste, and texture change due to the breakdown of certain substances and the formation of new ones.

4. Burning of Wood: When wood is burned, it changes from a solid substance into heat, light, smoke, and ash. This is a clear example of a substance change.

5. Digestion of Food: When we eat, our body breaks down the food we consume into simpler substances that can be absorbed and used by our body. This is a substance change that happens in our body every day.

6. Photosynthesis: This is a process that plants undergo every day. They absorb sunlight and convert carbon dioxide and water into glucose and oxygen. This is a substance change as new substances (glucose and oxygen) are formed from carbon dioxide and water.

7. Brewing Coffee: When you brew coffee, the water extracts the flavors and caffeine from the coffee beans, changing the substance of the water into coffee.

8. Melting of Ice: When ice melts, it changes from a solid state to a liquid state. This is a physical change in the substance.

9. Evaporation: When water is heated, it changes from a liquid state to a gaseous state, known as steam or water vapor. This is another example of a substance change.

10. Fermentation: This is a process used in making many types of food and drinks, like bread, yogurt, and alcohol. Yeast or bacteria change the sugars in the food into other substances like alcohol or lactic acid.

Question

1. Cooking: When you cook, you often change the substance of food. For example, when you fry an egg, the heat changes the raw egg into a cooked one.

2. Rusting of Iron: This is a common example of a substance change in everyday life. When iron is exposed to moisture over time, it reacts with oxygen in the air to form iron oxide, which we commonly refer to as rust.

3. Ripening of Fruits: The ripening of fruits is another example of a substance change. As fruits ripen, their color, taste, and texture change due to the breakdown of certain substances and the formation of new ones.

4. Burning of Wood: When wood is burned, it changes from a solid substance into heat, light, smoke, and ash. This is a clear example of a substance change.

5. Digestion of Food: When we eat, our body breaks down the food we consume into simpler substances that can be absorbed and used by our body. This is a substance change that happens in our body every day.

6. Photosynthesis: This is a process that plants undergo every day. They absorb sunlight and convert carbon dioxide and water into glucose and oxygen. This is a substance change as new substances (glucose and oxygen) are formed from carbon dioxide and water.

7. Brewing Coffee: When you brew coffee, the water extracts the flavors and caffeine from the coffee beans, changing the substance of the water into coffee.

8. Melting of Ice: When ice melts, it changes from a solid state to a liquid state. This is a physical change in the substance.

9. Evaporation: When water is heated, it changes from a liquid state to a gaseous state, known as steam or water vapor. This is another example of a substance change.

10. Fermentation: This is a process used in making many types of food and drinks, like bread, yogurt, and alcohol. Yeast or bacteria change the sugars in the food into other substances like alcohol or lactic acid.

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