Metabolism
Metabolism is how a living body breaks down food and turns it into energy to stay alive.
A kitchen stove holds a pot of food that slowly breaks down into smaller pieces as it heats. Those broken pieces move into a bowl nearby, where they become fuel for the fire under the stove. The fire uses that fuel to keep the whole kitchen warm and running. Your body works the same way: food goes in, breaks apart, and powers every part of you.
Explaining metabolism by grade level
Your body turns food into fuel, like a car turns gas into power. When you eat an apple, your body pulls energy from it. That energy helps you run, think, and grow. Even when you sleep, your body still uses fuel.
Projects that explore metabolism
A body breaks down food and turns it into energy, but supplements may change how efficiently that happens. This project compares three groups of three female mice over one month. One group receives Creatine Monohydrate, another receives Centrum, and the third eats only plain food with no supplement. Each group is weighed every two days, and the weight gained reveals whether either supplement shifted how the mice processed their normal diet.
When a body has less steady food coming in, it has less energy available for fast responses. This experiment measures reaction time across five participants following different diet types. Each participant starts and stops a stopwatch as quickly as possible, repeating the test daily for five days. The person with regular eating habits records faster reaction times than all four dieters.
Any living thing breaks down food and turns it into energy — that process is a basic sign of life. You set up four test tubes with yeast and warm water; two get sugar, two get none. A balloon covers each tube to catch any gas released. When yeast breaks down sugar, it releases carbon dioxide, and the balloons on the sugar tubes inflate while the others stay flat.
Higher sugar concentration in food may play a role in how much weight the body stores. You split 10 young mice into two groups of five — one group eats apples for 14 days, the other eats the same weight of jelly beans. You weigh each mouse before and after the two weeks. The jelly bean group gained slightly more weight.