BELLWORK 9 1817 Get ready for bellwork 1
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I can… List 3 types of adaptations? TOC # 18 Population Change Notes TOC # 19 Types of Adaptations worksheet
Environments always change over time Ø They change seasonally and sometimes for other reasons Ø So organisms must also change in order to survive Ø 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. Notice that it is moving southward Antarctica
Environments always change over time Ø 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. ce As the distance increases or decreases between the Earth and the Sun, Earth becomes colder or hotter. an ist D Sun Earth
Environments always change over time Ø 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 making the Earth colder. Example: When large asteroids strike the Earth, rock is pulverized and similar to volcanic eruptions, tons of rock dust is thrown up into the atmosphere. These dust clouds block sunlight causing our planet to become colder
Environments always change over time Ø So organisms, both plants and animals, must also change Ø Changing is called adapting (also called adaptation) Ø If an organism can not adapt to environmental changes they die Ø If too many of the organisms die, then the entire species will go extinct
Three types of adaptations that organisms must make in order to survive : (1) Behavioral- (what an organism does) (2) Structural- (what an organism is…shape & form of the body) (3) Physiological-(adaptations that deal with the internal body make-up that aid in body functions to help in survival. ) Types of adaptations worksheet
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