Hybirds
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This document is a table of contents for a multi-page project about animal hybrids. It lists the page numbers and topics for each section, including questions about hybrid animals, background on zebras and horses, profiles of different marine animal hybrids like false killer whales and dolphins, information and images of grizzly, polar, and grolar bears, and pages about wolf, coyote, and coywolf hybrids with accompanying photos. The document provides an overview of the various sections and content covered in the project about hybrid animals.
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28.2
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28.1
This document summarizes key aspects of nuclear radiation and radioactive decay:
1) Radioactive decay occurs as unstable radioactive isotopes spontaneously emit radiation and decay into stable isotopes, releasing large amounts of energy in the process.
2) There are three main types of radiation emitted - alpha, beta, and gamma rays - which differ in their penetrating abilities and what they are composed of.
3) Radioactive decay challenges Dalton's atomic theory, which stated atoms are indivisible, as it involves atomic nuclei breaking down and emitting particles.
28.4
Ionizing radiation such as X-rays and radiation from radioisotopes can knock electrons off atoms and produce ions, but cannot be detected by human senses. Devices like Geiger counters, scintillation counters, and film badges can be used to detect and measure different types of ionizing radiation. Radiation has many uses including detecting trace elements, diagnosing and treating diseases like cancer, and tracing chemical reactions and the movement of substances in the body using radioactive tracers.
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Hybirds
- 10. The Big Questions Pages 1-3: ©HO/Reuters/Corbis; Background: iStockphoto.com; Page 3: Zebra & Horse: iStockphoto.com; Page 4: False Killer Whale: ©Doug Perrine/SeaPics.com; Dolphin: Scholastic Photo Archive; Courtesy of Sea Life Park Hawaii; Page 5: Grizzly & Polar bears: iStockphoto.com; Grolar bears: ©BARM/Fame Pictures; Page 6: ©2002 Scholastic Inc. & Hemera Technologies Inc. All rights reserved; Cama: ©Kamran Jebreili/AP Wide World; Page 7: wolf: ©Rolf Kopfle/Bruce Coleman Inc.; coyote: ©2002 Scholastic Inc. & Hemera Technologies Inc. All rights reserved.; coywolf: ©Erwin & Peggy Bauer/Bruce Coleman Inc.; Page 8, Insets: Serval: ©Nigel J. Dennis/Photo Researchers; Bengal Cat: J-L. Klein & M-L. Hubert/Peter Arnold; Savannah Cat: ©J. M. Labat/Ardea.com