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Access Prior Knowledge Lesson 3: How do changes make more 
changes?

Access Prior Knowledge Lesson 3: How do changes make more 
changes?. Opening Activity O pen Science textbook to page 174. Open Science Workbook to page 57A to check home learning. Open Science folder to review vocabulary words and outline for the chapter.

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Access Prior Knowledge Lesson 3: How do changes make more 
changes?

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  1. Access Prior Knowledge Lesson 3: How do changes make more 
changes? Opening Activity Open Science textbook to page 174. Open Science Workbook to page 57A to check home learning. Open Science folder to review vocabulary words and outline for the chapter. Open Science journal and answer the following questions: 1. Give some examples of structural and behavioral adaptations? Review Content Cards and Q-Cards in bin, sharing with partners quizzing each other 
quietly. Log in to clickers using student ID number. Be ready to review home learning when timer goes off. Don't forget to write your 
home learning in your 
agenda page 58A.

  2. Do you agree with the statement? 1 Organisms can adapt to harmful changes in their ecosystem. Yes No

  3. Do you agree with the statement? 2 Once organisms lose their habitats, they can never find new homes. Yes No

  4. Do you agree with the statement? 3 An extinct species has limited numbers of its kind. Yes No

  5. Do you agree with the statement? 4 Poisons in ecosystems can travel through the food chain. Yes No

  6. Changes in Behavior Animals may change their behavior because there has 
been a change in the kinds or numbers of other animals in 
their ecosystem.

  7. Changes in Populations People can control the mosquito population 
by using a poison chemical called pesticide to 
kill mosquitoes decreasing the population 
rapidly. Some populations of mosquitoes have 
developed adaptations to changes in their 
ecosystem. Some bacteria cause diseases and can also 
adapt to changes in their environment making 
it harder to treat. Antibiotics are medicines that can kill these 
bacteria, but some bacteria are able to survive 
because they adapt to living around 
antibiotics passing their genes to their 
offspring. Third paragraph pg. 174

  8. Extinction A species that has no members of its kind 
alive is extinct. Fossils provide scientists with evidence on 
past extinctions as well as allow them to 
learn about the past. The dodo bird is extinct because it couldn’t 
move to safety and the Bald Eagle almost 
became extinct because of a pesticide called 
DDT that washed into lakes and 
contaminated the fish. First paragraph pg. 176 Extinction

  9. MatchQuest Cause Effect Spraying pesticide to kill mosquitoes. Creating antibiotics that kill disease- causing bacteria. Building cities where wild animals live. When many bacteria develop adaptations to antibiotic, the medicine no longer works. Large birds like hawks and falcons make thier homes now on tops of large buildings. Some will adapt to pesticide, have genes that allow them to live around the poison and reproduce.

  10. TextQuest Answer questions in your Science Journal. 1. Why do some bacteria become resistant to 
antibiotics? 2. How did the Bald Eagle become endangered? 3. How does spraying pesticides on crops affect 
insect populations? 4. When are organisms considered extinct? Don't forget to write your 
home learning in your 
agenda page 58A.

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