Here's a breakdown of what this means:

* Heat energy: This is the energy transferred between objects at different temperatures.

* Unit mass: This is a standard amount of the substance, typically measured in grams or kilograms.

* Temperature change: This refers to the difference in temperature before and after the heat is applied.

In simpler terms:

Imagine you have two identical pots, one filled with water and the other filled with sand. You apply the same amount of heat to both pots. The water will take much longer to heat up than the sand because water has a higher specific heat. This means water requires more energy to raise its temperature by the same amount as sand.

Key points:

* Units: Specific heat is typically measured in units of joules per gram per degree Celsius (J/g°C) or calories per gram per degree Celsius (cal/g°C).

* Substance-specific: Each substance has its own unique specific heat value. For example, water has a specific heat of 4.184 J/g°C, while iron has a specific heat of 0.444 J/g°C.

* Importance: Specific heat is an important concept in many fields, including chemistry, physics, and engineering. It helps us understand how different materials behave when exposed to heat and is crucial for designing and building things like engines, refrigerators, and solar panels.

Let me know if you have any other questions!