Content Standard 4: All students will explain how scientists construct and scientifically test theories concerning the origin of life and evolution of species; compare ways that living organisms are adapted (suited) to survive and reproduce in their environments; and analyze how species change through time. (Evolution)
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1. Explain how fossils provide evidence about the nature of ancient life. ( Key concepts: Types of evidence-fossil, extinct, ancient, modern life forms. Real-world contexts: Common contexts-plant and animal fossils, museum dioramas and paintings/drawings of ancient life and/or habitats.)
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2. Explain how physical and/or behavioral characteristics of organisms help them to survive in their environments. ( Key concepts: Characteristics-adaptation, fitness, instinct, learning, habit . Traits and their adaptive values-sharp teeth or claws for catching and killing prey, color for camouflage. Real-world contexts: Common vertebrate adaptations, such as white polar bears, sharp claws and sharp canines for predators, changing colors of chameleon; behaviors, such as migration, communication of danger, adaptation to changes in the environment.)
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Content Standard 5: All students will explain how parts of an ecosystem are related and how they interact; explain how energy is distributed to living things in an ecosystem; investigate and explain how communities of living things change over a period of time; describe how materials cycle through an ecosystem and get reused in the environment; and analyze how humans and the environment interact. (Ecosystems)
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1. Identify familiar organisms as part of a food chain or food web and describe their feeding relationships within the web. ( Key concepts: Producer, consumer, predator, prey, decomposer, habitat. Real-world contexts: Food chains and food webs involving organisms, such as rabbits, birds, snakes, grasshoppers, plants.)
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2. Explain common patterns of interdependence and interrelationships of living things. ( Key concepts: Producer, consumer, predator, prey, decomposer, habitat. Real-world contexts: Relationships among plants and animals in an ecosystem-symbiotic relationships, such as insects and flowering plants, birds eating fruit and spreading seeds; parasitic relationships, such as human and mosquitoes, trees and mistletoe.)
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3. Describe the basic requirements for all living things to maintain their existence. ( Key concepts: Needs of life-food, habitat, water, shelter, air, light, minerals. Real-world contexts: Selected ecosystems, such as an aquarium, rotting log, terrarium, backyard, local pond or wetland, wood lot.)
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4. Design systems that encourage growing of particular plants or animals. ( Key concepts: Needs of life-food, habitat, water, shelter, air, light, minerals. Real-world contexts: Ecosystems managed by humans, including farms, ranches, gardens, lawns, potted plants.)
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5. Describe positive and negative effects of humans on the environment. ( Key concepts: Human effects on the environment-garbage, habitat destruction, land management, resource management. Real-world contexts: Household wastes, school wastes, waste water treatment, habitat destruction due to community growth, reforestation projects, establishing parks or other green spaces.)
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