Unit 1 Lesson 2 Scientific Knowledge Copyright Houghton

Unit 1 Lesson 2 Scientific Knowledge Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 1 Lesson 2 Scientific Knowledge Florida Benchmarks • SC. 6. N. 2. 2 Explain that scientific knowledge is durable because it is open to change as new evidence or interpretations are encountered. • SC. 6. N. 3. 1 Recognize and explain that a scientific theory is a well-supported and widely accepted explanation of nature and is not simply a claim posed by an individual. Thus, the use of the term theory in science is very different than how it is used in everyday life. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 1 Lesson 2 Scientific Knowledge Florida Benchmarks • SC. 6. N. 3. 2 Recognize and explain that a scientific law is a description of a specific relationship under given conditions in the natural world. Thus, scientific laws are different from societal laws. • SC. 6. N. 3. 3 Give several examples of scientific laws. • LA. 6. 4. 2. 2 The student will record information (e. g. , observations, notes, lists, charts, legends) related to a topic, including visual aids to organize and record information and include a list of sources used. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 1 Lesson 2 Scientific Knowledge Explain That! What are some types of scientific explanations? • Examples of scientific explanations are theories, models, and laws. • A scientific theory is a well-supported explanation about the natural world. • Plate tectonics is an example of a scientific theory. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 1 Lesson 2 Scientific Knowledge What are some types of scientific explanations? • A scientific model is a representation of something in the natural world. • Models can be computer programs, mathematical equations, physical representations, and maps. • Models can give scientists a better sense of the past or of objects that would be difficult to study. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 1 Lesson 2 Scientific Knowledge What are some types of scientific explanations? • How does a model of Earth help scientists to visualize past events, such as the breakup of Pangaea? Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 1 Lesson 2 Scientific Knowledge What are some types of scientific explanations? • A scientific law is a basic principle of nature that always occurs under certain conditions. • Laws tell scientists what to expect. They are eternal and unavoidable. • Laws can be stated in many ways, including as equations or descriptions. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 1 Lesson 2 Scientific Knowledge Bending the Law • The law of gravity states that the attraction between two masses gets greater the larger the masses are and the closer they are. • Albert Einstein proposed that large objects can bend space. Gravity is the result of smaller objects “falling” down this warped space. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 1 Lesson 2 Scientific Knowledge Consider the Source What makes good scientific knowledge? • The best scientific theories and models are those that can adapt to explain new observations. • Scientific knowledge often is incomplete. As new evidence is presented, theories change. • The goal of science is to explain as much as possible and be open to change. Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 1 Lesson 2 Scientific Knowledge What makes good scientific knowledge? • How did new scientific knowledge change theory of light? Copyright © Houghton Mifflin Harcourt Publishing Company

Unit 1 Lesson 2 Scientific Knowledge What makes a good source? • Government, university, and nationally recognized research institutions usually are reliable sources. • Publications that are more than a few years old are unreliable sources of information. • Information made by those trying to sell a product often is unreliable. Copyright © Houghton Mifflin Harcourt Publishing Company