Enviroment Science part 2

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Graded Assignment Name: Ashtin Hendricks SCI010: Environmental Science | Unit 6 | Lesson 4: Semester Test Date: 10/18/17 Graded Assignment Semester Test, Part 2 Answer each question, using complete sentences. When you have finished, submit this assignment to your teacher by the due date for full credit. (8 points) 1. Describe DDT and summarize the history of the use and banning of DDT, including actions taken by the U.S. government. State the major reasons for spraying with DDT and for banning it. State three or more ways science has played a role in the controversy. Score Answer: is a colorless, tasteless, and almost odorless crystalline organochlorine known for its use in killing insects. It was discovered in 1874 and used for controlling malaria and typhus. It was very successful in controlling these diseases. In 1945 it became available in the United States and was promoted as a pesticide However, in the 1950’s the government began tightening bans on the use of DDT. There were concerns of the effects of DDT on people and the environment In 1962 Rachel Carson wrote a book “Silent Spring” that warned of the environmental impacts of DDT, The book claimed that DDT and other pesticides had been shown to cause cancer and that the agricultural use was a threat to wildlife, particularly birds. (8 points) 2. Choose one of the following resources: timber, fish, soil, water, or fossil fuels. Discuss current problems having to do with the use and management of the resource, and approaches that have been taken to resolve the problems. Score Answer: © 2010 K12 Inc. All rights reserved. Copying or distributing without K12’s written consent is prohibited. Page 1 of 2 Graded Assignment SCI010: Environmental Science | Unit 6 | Lesson 4: Semester Test (7 points) 3. Identify the natural cycle that is shown in the diagram. Then, for each box in the diagram, write one or two sentences explaining the labeled process as it relates to this cycle. Score Answer: (7 points) 4. Identify an animal or plant that is in danger of extinction or that has been in danger of extinction in the recent past. State the environmental problems that would occur if the species became extinct. Describe the efforts that have been made to preserve the species, and any opposition the efforts faced. Discuss how successful the efforts have been, and what accounts for their success or failure. In describing preservation efforts, name a law, if any, that deals with this species’ protection. Score Answer: Your Score © 2010 K12 Inc. All rights reserved. Copying or distributing without K12’s written consent is prohibited. ___ of 30 Page 2 of 2
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Question 1
Answer
is a colorless, tasteless, and almost odorless crystalline organochlorine known for its use in
killing insects. It was discovered in 1874 and used for controlling malaria and typhus. It was very
successful in controlling these diseases. In 1945 it became available in the United States and
was promoted as a pesticide However, in the 1950’s the government began tightening bans on
the use of DDT. There were concerns of the effects of DDT on people and the environment In
1962 Rachel Carson wrote a book “Silent Spring” that warned of the environmental impacts of
DDT, The book claimed that DDT and other pesticides had been shown to cause cancer and that
the agricultural use was a threat to wildlife, particularly birds.
Question2
Answer
Cutting down trees for timber
Harv...


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