Ergebnis von "Christine Graf" in Alle Kategorien

In medicine, machines can be used to take detailed pictures of bones and even to save people’s lives. Listen to learn about the marvelous machines of modern medicine, like the defibrillator, the x-ray machine, and more!

The wind is moving air! When warm air rises through the atmosphere, cool air flows in to take its place, creating wind! Did you know that wind power can produce electricity? Tall machines called wind turbines are solar-powered and becoming the fastest-growing renewable source of energy–they burn no fuel and cause no pollution. Turbines can be found on many wind farms, especially in Europe!

Native American tribes from the Northwest Coast learned to use the wood of cedar trees for many of their daily needs. Tribes used recycling to conserve resources hundreds of years ago. Pounding bark until it was fluffy to make diapers and with special thin branches called withes, cedar trees were soaked and used to make rope. What special technique did tribes use to take down big cedar trees?

In the 1600s, a boy from colonial Jamestown named Thomas Savage was traded to the Powhatans in exchange for a boy named Namontack. The English hoped this gift would prove their friendship to Chief Powhatan and allow them to teach Namontack about England. While staying with the tribe, Thomas learned their language and culture, and served as an interpreter between the Native Americans and Europeans.