Access Prior KnowledgeLesson 3: How do changes make more changes?

Opening ActivityOpen 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.

1 Organisms can adapt to harmful changesin their ecosystem.

Yes

No

Do you agree with the statement?

2 Once organisms lose their habitats, theycan never find new homes.

Yes

No

Do you agree with the statement?

3 An extinct species has limited numbers ofits kind.

Yes

No

Do you agree with the statement?

4 Poisons in ecosystems can travel throughthe food chain.

Yes

No

Do you agree with the statement?

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.

Changes in PopulationsPeople 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 paragraphpg. 174

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.

Extinction

First paragraphpg. 176

MatchQuest

Cause Effect

Spraying pesticide to kill mosquitoes.

Creating antibiotics that kill disease-causing bacteria.

Building cities where wild animals live.

Some will adapt to pesticide, have genes that allow themto live around the poison and reproduce.

When many bacteria develop adaptations to antibiotic,the medicine no longer works.

Large birds like hawks and falcons make thierhomes now on tops of large buildings.

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.