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Ms. Pollock 8th Grade Physical Science

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1 Ms. Pollock 8th Grade Physical Science 2009 - 2010
The Nature of Science Ms. Pollock 8th Grade Physical Science

2 What Is Science? Science is a way of learning about the natural world.
Why, how, or when? Observation very important

3 Asking Questions With science, we can answer questions about the natural world. We cannot answer questions that involve emotion or beliefs. Science answers questions that are measureable and verifiable.

4 Possible Explanations
The questions we ask are answered with available information. It is impossible to know everything. Explanations change as new information is obtained.

5 Example Once believed that Apollo rode a chariot across the sky, was sun Now we know Earth rotates and revolves around the sun.

6 Scientific Theories Scientific theory: an attempt to explain a pattern observed repeatedly in the natural world Not just a guess Observation investigation Best explanation so far Can be changed for new information

7 Scientific Theories Evolution not yet completely proven

8 Scientific Laws Scientific law: rule that describes a pattern in nature Observed repeatedly Aids in prediction Cannot explain why something happens

9 Scientific Laws Gravity

10 Systems in Science System: a collection of structures, cycles, and processes that relate to and interact with each other Not just found in science Interacting parts within a whole

11 Systems in Science Respiratory system Endocrine system School system

12 The Branches of Science
Life science Earth science Physical science

13 Life Science Life science: study of living systems and the ways in which they interact Living organisms, their habitats and behaviors Health field, biology, zoos, botanists, farmers, beekeepers

14 Earth Science Earth science: study of Earth systems and the systems in space Nonliving things Weather and climate Geology, meteorology, astronomy, oceanography Maps and formations

15 Physical Science Physical science: study of matter and energy
Living and nonliving things Chemistry and physics

16 Careers Many careers in physical sciences Chemist, physicist
Ultrasound and X-ray technician

17 Science and Technology
Answers not helpful unless applied Technology: practical use of science; applied science Example light and fiber optics A property of light passing through a fiber optic cable is science. Using a fiber optic cable to transmit information is technology.

18 Science and Technology
Dustbuster Solar energy Programmable pacemakers Voice-controlled wheelchairs Wireless communication Doppler Radar

19 Section 1 Review 1. Compare and contrast scientific theory and scientific law. Explain how a scientific theory can change. 2. Explain why science can answer some questions, but not others. 3. Classify the following statement as a theory or a law “Heating the air in a hot-air balloon causes the balloon to rise.”

20 Section 1 Review 4. Think critically. Describe the importance of technology and how it relates to science. 5. Infer. Scientists ask questions and make observations. What types of questions and observations would you make if you were a scientist studying schools of fish in the ocean?

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