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Additional Lessons 21 - 30 of 289 for Desert Vegetation
  21.   Images of Our Changing Earth
...gases such as methane from industry and agriculture, chlorofluorocarbons (CFC's) from propellants and coolants, and tropospheric ozone from automobile and industrial pollution. Add to this the fact that nearly half the world's people have daily needs for fuel and food that are reducing the Earth's vegetation and the productivity of marginal agricultural land. Because of economic and cultural forces, their very survival often depends on cutting the Earth's forests. The clearing of tropical rainforest is often done by burning, which not only destroys the world's greatest reserve of plant and animal diversity, but adds carbon...
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    Grade Level: 3-5

  22.   Tree of Life
...is reserved for pigs. The pigs, similar to wild boars, are very important socially; they are used to honor the dead and to secure a wife. This tribe is known for their funerary rites, which sometimes last up to a year. The heads of the deceased are reconstructed using clay, spider webs, bamboo, and vegetable fibers. Kraho (#4) Near the Tocantis River in Brasilia, in rectangular huts covered with straw, live the Kraho, one of the many tribes of Central Brazil. Trunk races are their daily sport. Two teams of young men get together outside the village and each team cuts down a Buriti palm trunk weighing at least thirty pounds....
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    Grade Level: 9-12

  23.   Planet of Plenty
...made up of three components: genetic diversity, species diversity, and ecologi- cal diversity. Genetic diversity is the variability in the genetic makeup among individuals within a single species. Species diversity is the variety of species on Earth. Ecological diversity is the variety of forests, deserts, grasslands, streams, lakes, oceans, and other biological communities that interact with one another and with their nonliving environments. Biologists estimate that Earth's current biodiversity consists of 40 to 80 million different species, each having variations in its genetic makeup and living in a variety of biologica...
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    Grade Level: 9-12

  24.   The First Thanksgiving
...However winter was coming and many Pilgrims were becoming sick and their food was growing scarce. Time was running out. The search party ultimately found the area they were looking for, Plymouth. Plymouth had been mapped out by a man named John Smith in an earlier voyage. Plymouth was the site of a deserted Indian village that had cleared fields and several fresh water streams. The small group returned to the Mayflower after a harrowing trip that included several encounters with Indians and near-miss shipwreck. On December 16, 1620 the Mayflower sailed to Plymouth. Plymouth ? a.k.a. Pawtuxet The Pawtuxet Indians had lived i...
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    Grade Level: K-2

  25.   Let's Think About... Plants
PBS Kids Logo Go To Fun with Jay Jay Show _ Information _ TV Schedule Let's Think About... Plants Plants grow all around us: in the mountains, the valleys, the FAQs deserts and the oceans. Plants are living things. Plants grow and change over time. Activities Life Plants are food for people and animals. Lessons Tall trees and tiny blades of grass are all plants. Science & There are many kinds of plants, each has its own form. Nature Most plants grow from seeds; some plants grow from roots an...
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    Grade Level: K-2

  26.   How Do Populations Grow?
...he early 1900's, wild rabbits were taken from England to Australia to be used for hunting. Since then, rabbits have multiplied exponentially and have severely affected the ecosystem where they live. The total damage done by wild rabbits in Australia is estimated at $600 million dollars. The loss of vegetation from rabbit grazing threatens the survival of native birds, mammals, and insects that rely on plants for food and shelter. Wild rabbits compete with livestock for available pasture and kill young trees and shrubs. The holes they dig contribute to soil erosion by removing vegetation and disturbing soil. Question 2. Why...
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    Grade Level: K-12

  27.   Marine Reptiles
...e or hibernate. In warm regions they are dormant during droughts; in colder regions, during winter. Crocodilians are egg-laying, or oviparous, reptiles, reaching reproductive maturity at about the age of ten. The eggs, 20 to 90 in number and about the size of goose eggs, are buried in sand, mud, or vegetable debris, where they are left to hatch by the heat of the sun or of vegetable decomposition. Females of some species remain in the area to protect the nest and care for the newly hatched young, although many of the eggs and young are lost to predators. The parental behavior of crocodilians is unique among reptiles and poi...
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    Grade Level: 3-5

  28.   Jewish Diversity: Travels of Jewish Foods and Jewish Families
...ther as a whole group, or in the small groups who have read the text together. * * * What is happening in this passage? What foods are mentioned? Who is missing them, and where are they located? This passage foreshadows much about future Jewish history after the Bible. Even while wandering in the desert as free people, the former slaves look back nostalgically at the foods they ate in Egypt. Even though their situation wasn't very good in Egypt, they miss it. How is our situation in any way similar to theirs? * * * What foods make you feel at home? What foods do your parents/other family members make best? Have you ever...
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    Grade Level: 9-12

  29.   Location, Location, Location
...Spotter" problem (Bennett, 2002, p. 82) and extends to regular polygons with an even number of sides. Group students in pairs. Display the Triangular Island overhead on the projector. Triangular Island Overhead Then, tell the following story: Suppose that you and a friend have become stranded on a desert island, which is in the shape of a regular triangle. Gilligan is a lazy, incessant bore, so you'd like to build a hut far away from him. In addition, you need to place your hut on the island so that the sum of the distances to each of the three shores will be as small as possible. Students may wonder why each person would...
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    Grade Level: 9-12

  30.   Using Mathematical Models to Investigate Planetary Habitability
...w that would be done. After students suggest a possible procedure, the teacher can explain the albedo calculator map activity. Procedure Students are divided into groups of five. Each group is assigned a portion of the earth and instructed to determine the percentage of their portion that is ocean, vegetation, desert, or ice. The percentages are entered into the Albedo Calculator spreadsheet to determine the average albedo of that portion. The average albedos of each portion are then collectively averaged in order to obtain the albedo of the earth. After the students have determined the average albedo, the teacher can ask i...
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    Grade Level: 9-12


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