Fill a partially narrow container with sunflower oil and mark the upper oil level. Measure the air temperature with a thermometer. Then place the container in hot water and mark the upper oil level again. Measure the water temperature with the same thermometer. Then fill the same vessel with another liquid and take the same measurements. Compare the distances between the marks on the vessel in the two experiments. Make a conclusion.
When oil and other liquid are heated, they expand, and they expand unevenly.
Remember: The process of learning a person lasts a lifetime. The value of the same knowledge for different people may be different, it is determined by their individual characteristics and needs. Therefore, knowledge is always needed at any age and position.