Temperature is a measure of how hot or cold something is. It is typically measured in degrees, using a thermometer. The temperature of an object or environment is determined by the amount of heat it has. Heat is a form of energy that can be transferred from one object to another, and it is what makes things feel warm to the touch. Hot objects have more heat energy than cold objects, so they have a higher temperature. Cold objects have less heat energy, so they have a lower temperature. When we talk about the temperature of the air, we are usually referring to the temperature of the Earth’s surface. The temperature of the air can vary depending on where you are and what time of year it is. Some places can be very hot, while others can be very cold. The average temperature on the Earth’s surface is about 59 degrees Fahrenheit (15 degrees Celsius).