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Animals that changed history
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Joan Elma Rahn |
Discusses the effects on history--for better or worse--made by the horse, rat, and beaver. |
OL5257605W |
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Eyes & seeing
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Joan Elma Rahn |
Describes some diverse types of eyes from flatworms to humans. Includes information on light and simple experiments. |
OL5257608W |
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Grocery store zoology
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Joan Elma Rahn |
Introduces the function of bones, joints, and muscles using the chicken and other meat available at the grocery store as examples. |
OL5257610W |
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How plants are pollinated
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Joan Elma Rahn |
Describes the many ways that flowers are pollinated and the pollinating agents that make the differences in flowers possible. |
OL5257612W |
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Keeping warm, keeping cool
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Joan Elma Rahn |
Describes how living things, especially animals and human beings, adapt to environmental temperature changes, in order to conserve heat in cold weather and lose it in hot weather. |
OL5257614W |
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Plants that changed history
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Joan Elma Rahn |
Recounts five episodes from history when the introduction of new plants or plant products, from grains and spices to coal, influenced the course of civilization. |
OL5257620W |
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Seeing what plants do
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Joan Elma Rahn |
Twenty-one experiments explain the growth process in a variety of plants. |
OL5257622W |