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

Unit 1 Lesson 2 Scientific Knowledge

Copyright © Houghton Mifflin Harcourt Publishing Company


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.


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.

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.

• Explain observations scientists have made

• Undergo lots of testing• Based on Evidence

• Plate tectonics is an example of a scientific theory.

• Theories change over time


What are some types of scientific explanations?• A scientific model is a representation of something in the natural world.

• Help scientists study things that may be to large or small to study otherwise

• Models can be computer programs, mathematical equations, physical representations, and maps.

• Scientists use models to help them understand past present and future events



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?



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.

• Charles Law states as the temperature of a gas increase its volume increases

• Charles Law V1/T1 = V2/T2 or V1T2 = V2T1,




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.

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.


What makes good scientific knowledge?

• How did new scientific knowledge change the theory of light?



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.



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

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