The heat from the ----- warms the earth!

---occurs when two objects are rubbed together. This creates heat.

--flows and creates heat!

Sometimes, chemicals can be put together by ---- There are heat packets that have chemicals that mix together to generate heat and keep people's hands warm.

You can generate heat through ----. Campfires produce heat to keep people warm and to cook food.

We can use a ----- to measure the temperature.

We use the thermometer to measure the temperature in degrees.

In the United States, the temperature is most often measured in degrees ---

What is the temperature?

What is the temperature?