Other
The Grain Chain: Measuring Energy
Read about how we measure energy from food and what a calorie is.
Other
The Grain Chain: My Energy Diary [Pdf]
Use the table to keep track of the food you eat during the day. Then check to see if the energy from the food you ate is equal to the energy you used throughout the day.
Sophia Learning
Sophia: Introduction to Efficiency
A narrated tutorial which introduces the concept of efficiency as it relates to energy input and output. [1:36]