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Eureka! chapter 8 lesson
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Description
Scientists and Engineers are Fearless
Disciplinary Core Ideas
Objects in contact exert forces on each other.
Many characteristics of organisms are inherited from their parents.
Some kinds of plants and animals that once lived on Earth are no longer found anywhere.
For any particular environment, some kinds of organisms survive well, some survive less well, and some cannot survive at all.
Populations live in a variety of habitats, and change in those habitats affects the organisms living there.
The faster a given object is moving, the more energy it possesses.
Possible solutions to a problem are limited by available materials and resources (constraints). The success of a designed solution is determined by considering the desired features of a solution (criteria). Different proposals for solutions can be compared on the basis of how well each one meets the specified criteria for success or how well each takes the constraints into account.
Human activities in agriculture, industry, and everyday life have had major effects on the land, vegetation, streams, ocean, air, and even outer space. But individuals and communities are doing things to help protect Earth’s resources and environments.
Other characteristics result from individuals’ interactions with the environment, which can range from diet to learning. Many characteristics involve both inheritance and environment.
Fossils provide evidence about the types of organisms that lived long ago and also about the nature of their environments.
Plants and animals have both internal and external structures that serve various functions in growth, survival, behavior, and reproduction.
The food of almost any kind of animal can be traced back to plants. Organisms are related in food webs in which some animals eat plants for food and other animals eat the animals that eat plants. Some organisms, such as fungi and bacteria, break down dead organisms (both plants or plants parts and animals) and therefore operate as “decomposers.” Decomposition eventually restores (recycles) some materials back to the soil. Organisms can survive only in environments in which their particular needs are met. A healthy ecosystem is one in which multiple species of different types are each able to meet their needs in a relatively stable web of life. Newly introduced species can damage the balance of an ecosystem.
Energy can be moved from place to place by moving objects or through sound, light, or electric currents.