6th Grade · Science · Activity · shared by Luke Morgan
Explore Rufous Hummingbird energy conversion from nectar to flight in this 6th Grade Science activity on metabolism and kinetic energy.
Case Study: The High-Speed Flight of the Rufous Hummingbird
Imagine a tiny creature, weighing no more than a nickel, that travels over 3,000 miles during its yearly migration. This is the Rufous Hummingbird. To survive this journey, these birds must perform an incredible feat of science: they convert the chemical energy found in flower nectar into the kinetic energy needed to flap their wings at blurry speeds. Kinetic energy is the energy of motion, and for a hummingbird, staying in motion is a matter of life or death.
The Rufous small bird has a very fast metabolism. Metabolism is the process where tiny cells change food into power. These birds eat a sweet liquid from flowers. This liquid is full of a special sugar called sucrose . Once inside the body, the bird breaks this sugar down into a basic form called glucose . This sugar is the main fuel for all animal cells. To fly, the bird must turn the energy stored in food into kinetic energy. This change happens inside the large chest muscles used for flight.
These chest areas contain many small parts called mitochondria . These parts of a cell act like tiny power plants. They take in sugar and oxygen to produce the power that makes the body move. When the bird moves quickly, it creates the motion needed to stay in the air. This rapid movement allows the bird to stay in one spot or fly forward. Without a steady supply of sugar, the bird would lose its ability to stay in flight. Turning food into motion is an amazing biological process that happens every second.
Scientists studying these birds have noticed a massive difference in how much energy they use depending on what they are doing. When a hummingbird is just perching on a branch, it only needs about 0.02 milligrams of sugar per minute to keep its heart beating and stay…