Did you know that all foods we eat have some type of energy in them. That is why we eat them because our bodies need food to convert to energy and allow our muscles to move. Energy is heat for our bodies.
How can we see what type of energy a piece of food contains even though we are not eating it and digesting it? We will light a piece of food to show it has energy, otherwise it would not burn and then use the energy from it burning to show it can heat water.
Get these materials for the science experiment:
Now you will do this with the peanut and piece of bread. (Note: the peanut may take a little while to light but do not give up. It will light because it has energy inside it.)
Make sure to record your temperature each time and use new room temperature water each time you do this.
What you have discovered is that each type of food we eat will burn because it has energy stored within it and that is what our body uses as fuel. Some foods have more energy inside them than others and that energy can be used to heat water just like it used the energy to keep our bodies warm.
What you are learning is that everything has energy which is measured in BTUs and for every BTU it should be able to raise four ounces of water 1 degree so when you see how many degrees the water temperature went up should show you how many BTUs of energy that piece of food contained.