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Notes SPI 0807.5.2 Adaptation Science Tennessee SPI Objective: Instructions and physiological Analyze structural, behavioral, 1) First click to on "View" the top-menu bar. are adaptations predictfrom which populations 2) Then click on "Slide Show" from the drop-down menu. likely to use survive in a particular 3) Then the right-arrow button onenvironment. your keyboard to Learning advance through Essential this presentation. Students will analyze behavioral and structural adaptations that relate to species survival. Essential Question How do species adapt their behavior and their physical structure in order to survive? Notes SPI 0807.5.2 Adaptation Science Environments always change over time So organisms, both plants and animals, must also change Changing is called adapting (also called adaptation) If an organism can not adapt to environmental changes they die If too many of the organisms die, then the entire species will go extinct Notes SPI 0807.5.2 Adaptations Science Environments always change over time They change seasonally and sometimes for other reasons So organisms must also change in order to survive. This is called adapting One reason that environments change is due to the movement of tectonic plates. Example: Antarctica is very cold and icy today since it is at the south pole Yet millions of years ago Antarctica was further north and had a warm climate. It moved south riding on a tectonic plate. As it moved the environment became colder. As the environment became colder, the plants and animals there had to adapt or die. Notes SPI 0807.5.2 Adaptation Science Environments always change over time Millions of years ago Antarctica was further north and had a warmer climate. It moved south riding on a tectonic plate. As it moved the environment became colder. As the environment became colder, the plants and animals there had to adapt or die. Antarctica Notes SPI 0807.5.2 Adaptation Science Environments always change over time Millions of years ago Antarctica was further north and had a warmer climate. It moved south riding on a tectonic plate. As it moved the environment became colder. As the environment became colder, the plants and animals there had to adapt or die. Notice that it is moving southward Antarctica Video Link: Tectonic Plate Movement Notes SPI 0807.5.2 Adaptation Science Environments always change over time Another reason that environments change is due to the way the Earth orbits (revolves) the sun Example: In reoccurring cycles lasting thousands to millions of years, the Earth wanders either a bit further away or a bit closer to the sun as it orbits the sun. When Earth orbits closer to the sun, the entire planet is warmer. When Earth orbits farther away from the sun, the entire planet gets colder. As the planet becomes hotter or colder, plants and animals must adapt or die. Earth As the distance increases or decreases between the Earth and the Sun, Earth becomes colder or hotter. Sun Notes SPI 0807.5.2 Adaptation Science Environments always change over time Another reason for this change is due to catastrophic events like volcanoes and/or objects striking the planet from space. Example: Volcanic eruptions can throw tons and tons of rock dust and smoke into the atmosphere creating gigantic clouds that block sunlight. This affects plants, and the animals that eat them. Both the plants and animals have to adapt or die. Video Link: Volcanic Eruption Notes SPI 0807.5.2 Adaptation Science Environments always change over time Another reason for this change is due to catastrophic events like volcanoes and/or objects striking the planet from space. Example: When large asteroids strike the Earth tons of rock dust is thrown up into the atmosphere. These dust clouds block sunlight causing our planet to become colder. This affects plants, and the animals that eat them. They must adapt or die. Video Link: Asteroid Strike (In the Past) Video Link: Asteroid Strike (In the Future?) Quick Review SPI 0807.5.2 Adaptation Science Questions What is one reason that environments change? What is another reason that environments change? What is another reason that environment change? When environmental change occurs, what happens to the organisms that live in the environment? What is extinction? Is extinction rare or common? Explain how humans are causing environmental change around the planet.