ch01 - Chapter 1:Fundamental Concepts and Units of...

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1 Chapter 1:Fundamental Concepts and Units of Measurement Brady & Senese 5th Ed
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2 Index 1.1. Chemistry is important for anyone studying the sciences 1.2. The scientific method helps us build models of nature 1.3 Matter is composed of elements, compounds, and mixtures 1.4. Properties of matter can be classified in different ways 1.5 Measurements are essential to describe properties 1.6. Measurements always contain some uncertainty 1.7. Units can be converted using the factor-label method 1.8. Density is a useful intensive property
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1.1. Chemistry is important for anyone studying the sciences 3 Chemistry and the Sciences Chemistry- the study of the composition of matter and its transformations Matter - anything that takes up space and has mass Chemical reaction - change that results from the interaction of matter.
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1.2. The scientific method helps us build models of nature 4 Scientific Method : Getting Started Observe a Phenomenon-accurately describe something we see, taste, feel, smell or hear Pose A Question To Explain The Phenomenon Form a Hypothesis-a tentative explanation of the phenomenon
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1.2. The scientific method helps us build models of nature 5 Scientific Method: Testing the Hypothesis Experiment to Prove or Disprove Hypothesis If experiment proves hypothesis, form theory (theoretical model) If experiment disproves hypothesis, Pose new question or hypothesis Continue experimentation. If results form pattern, considered a law
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1.2. The scientific method helps us build models of nature 6 Scientific Method Case Study: The Process of Growth A child sees that a seed, when planted in soil, watered, and exposed to sunlight, grows to form a flower. He concludes that all living things require sunlight, water, and burial in soil to grow. Build a case for rebuttal using the scientific method.
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1.2. The scientific method helps us build models of nature 7 Your Turn! Which of the following is not a hypothesis for the observed plant growth? A. soil is necessary to all growth B. light is essential to growth of the seed C. water is required to allow growth D. plants grow to a greater height if they receive fertilizer E. none of the above
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1.2. The scientific method helps us build models of nature 8 Your Turn! A chicken egg is buried, left in the sun, and watered. A second egg is left above the soil, watered and left in the sun. Would this prove that soil is necessary to growth? A. Yes B. No
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1.2. The scientific method helps us build models of nature 9 The Scientific Method- Evaluating The Data A theory is an explanation (based on well-tested, internally consistent experimental results) about why the phenomenon may occur it should explain currently available data It should be as simple as possible It should clearly show underlying connections It should accurately predict future behaviors
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1.2. The scientific method helps us build models of nature 10 The Scientific Method is Cyclical
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1.2. The scientific method helps us build models of nature
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This note was uploaded on 03/02/2010 for the course CHEM 211 taught by Professor Rellima during the Spring '08 term at Wichita State.

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ch01 - Chapter 1:Fundamental Concepts and Units of...

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