Chapter 7 Changes Over Time February 8, 2013 (A Day) Agenda DSJ #25 Darwin’s Observations (Notes) Video: The Jeff Corwin Experience – The Galapagos Islands DSR #25

Chapter 7 Changes Over Time February 11, 2013 (B Day) Agenda DSJ #25 Darwin’s Observations (Notes) Video: The Jeff Corwin Experience – The Galapagos Islands DSR #25

Chapter 7 Changes Over Time DSJ #25 Science Notebook – 49B Prompt: In 5 sentences or more, describe how species of birds are different. Use examples of specific types of birds and describe their differences in things like habitat (where they live) and what they eat. Describe the ways in all birds are similar.

Chapter 7 Changes Over Time DARWIN’S OBSERVATIONS

Chapter 7 Changes Over Time Learning Objective Students will describe the observations that Darwin made on his voyage to the Galapagos islands and describe the theory of evolution that he proposed soon after. Changes Over Time

Chapter 7 Changes Over Time Darwin’s Voyage In 1831, 22-year-old Charles Darwin sailed on the Beagle, from England to the Galápagos Islands to observe all of the different plants and animals there. Changes Over Time

Chapter 7 Changes Over Time Darwin’s Voyage 1. True or false? Charles Darwin was not surprised by the variety of living things he saw on his voyage around the world. Changes Over Time Darwin was amazed by the tremendous diversity of living things that he saw.

Chapter 7 Changes Over Time Vocabulary 2. A group of similar organisms that can mate with each other and produce fertile offspring is called a ________________. Galapagos Giant Tortoise (Chelonoidis nigra)

Chapter 7 Changes Over Time Vocabulary 2. A group of similar organisms that can mate with each other and produce fertile offspring is called a __species________. Galapagos Giant Tortoise (Chelonoidis nigra)

Chapter 7 Changes Over Time Vocabulary 3. A _______________ is the preserved remains or traces of an organism that lived in the past.

Chapter 7 Changes Over Time Vocabulary 3. A ____fossil_____ is the preserved remains or traces of an organism that lived in the past.

Chapter 7 Changes Over Time Galapagos Organisms 4.) a.b. c. d. Darwin found many similarities between Galapagos organisms and those in South America. The iguanas on the Galapagos islands had large claws that allowed them to grip slippery rocks, where they fed on seaweed. Darwin hypothesized that a small number of different plant and animal species had come to the Galapagos islands from the mainland. Tortoises on one island had dome-shaped shells. Those on another island had saddle-shaped shells.

Chapter 7 Changes Over Time Darwin’s Observations 5.) Darwin noticed many differences among similar organisms as he traveled from one Galapagos island to the next.

Chapter 7 Changes Over Time Adaptations 6.) _______ insects 7.) _______ seeds a.b. Finches that ate seeds had strong, wide beaks. Finches that ate insects had narrow, needle-like beaks.

Chapter 7 Changes Over Time Adaptations 8.) A trait that helps an organism survive and reproduce is an adaptation.

Chapter 7 Changes Over Time Darwin’s Conclusions 9.) a.b. c. d. Darwin spent the next 20 years consulting with other scientists, gathering more information, and thinking through his ideas. Darwin hypothesized that species gradually changed over many generations. From the evidence he collected, Darwin concluded that organisms on the Galapagos islands had evolved. Darwin studied other examples of changes in living things, such as selective breeding, to help him understand how evolution might occur.

Chapter 7 Changes Over Time Evolution 10.) What is evolution? Evolution is the gradual change in a species over time.

Chapter 7 Changes Over Time Scientific Theory 11.) A well-tested concept that explains many observations is: a. idea b. evolution c. Scientific theory d. hypothesis

Glue in SNB **Please remember to use only TWO drops of glue!!** If everyone uses only TWO drops, a lot of glue is saved over time…. 49A – Darwin’s Observations (Notes) 50B – The Jeff Corwin Experience

Chapter 7 Changes Over Time DSR #25 Science Notebook – 49B (Under DSJ #25) Prompt: In 3 sentences or more, write about the 3 most interesting things you learned from watching the video “The Jeff Corwin Experience: The Galapagos Islands.”