http://www.educents.com/complete-curriculum STUDENT MANUAL FOURTH GRADE SCIENCE / LESSON 180 Lesson 180 Extinction Since the beginning of time some animals have appeared and then disappeared. This process was slow and natural. However, in more recent times, man has contributed greatly to the extinction of some animals. Some types of animals have become endangered. There are three distinct ways in which man has helped cause animal species to reduce in numbers. One way is over-hunting and collecting. Since the beginning of time, man has used animals for food, clothing and a number of other products. Elephants were hunted for their tusks. People have even illegally collected some exotic animals as pets or to trade. http://www.educents.com/complete-curriculum STUDENT MANUAL FOURTH GRADE SCIENCE / LESSON 180 A second way animals have been threatened is by having their habitat changed. Animals have been displaced by people building their homes in areas animals lived and roamed. In Hawaii, certain kinds of home-creepers (birds) feed on the nectar of hibiscadelphus flowers. Plant-eating animals have wiped out these plants. Now the birds are robbed of their food supply. Thirdly, the animals’ surroundings are being destroyed. The rainforests are of great concern for scientists because they are disappearing. The trees are used for timber and the land is farmed. Since the rainforests are believed to account for half of all the species on Earth, this is a drastic threat to their survival. http://www.educents.com/complete-curriculum STUDENT MANUAL FOURTH GRADE SCIENCE / LESSON 180 Here is a list of animals that face possible extinction. Select one and do a report on what you have found out about the animal. Tigers Rhinos Pandas Sea turtles Monkeys Gorillas Sea otters. http://www.educents.com/complete-curriculum STUDENT MANUAL FOURTH GRADE SCIENCE / LESSON 180 Lesson 180 Extinction Name:____________________________________________Date:__________________ I am writing my extinction report on this animal_______________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________ ________________________________________________________________________