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The World of Physical Science Chapter 1. Physical Science The study of matter & energy All matter has energy Chemistry studies all forms of matter & how.

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Presentation on theme: "The World of Physical Science Chapter 1. Physical Science The study of matter & energy All matter has energy Chemistry studies all forms of matter & how."— Presentation transcript:

1 The World of Physical Science Chapter 1

2 Physical Science The study of matter & energy All matter has energy Chemistry studies all forms of matter & how they interact Physics studies energy & how it affects matter Part of other scientific areas: Astronomy, Meteorology, Botany, Geology, Oceanography, Ecology, Biology The study of matter & energy All matter has energy Chemistry studies all forms of matter & how they interact Physics studies energy & how it affects matter Part of other scientific areas: Astronomy, Meteorology, Botany, Geology, Oceanography, Ecology, Biology

3 Scientific Method Series of steps that scientists use to answer questions & solve problems 1.Ask a question 2.Form a hypothesis 3.Test a hypothesis 4.Analyze the results 5.Draw conclusions 6.Communicate results Series of steps that scientists use to answer questions & solve problems 1.Ask a question 2.Form a hypothesis 3.Test a hypothesis 4.Analyze the results 5.Draw conclusions 6.Communicate results

4 Theories vs. Laws Theories - unifying explanations for a broad range of hypothesis & observations that have been supported through testing (THIS IS NOT JUST A HUNCH OR GUESS) Ex. Cell theory, Atomic theory, evolutionary theory Laws - a summary of many experimental results and observations Ex. Law of Gravity (Newtons Laws) Theories - unifying explanations for a broad range of hypothesis & observations that have been supported through testing (THIS IS NOT JUST A HUNCH OR GUESS) Ex. Cell theory, Atomic theory, evolutionary theory Laws - a summary of many experimental results and observations Ex. Law of Gravity (Newtons Laws)

5 Models Representation of an object or system Ex. Rocket, cell, globe, atom, maps, sheet music, equations Allow you to test ideas without spending time and money to make the real thing Used to illustrate theories and build scientific knowledge Representation of an object or system Ex. Rocket, cell, globe, atom, maps, sheet music, equations Allow you to test ideas without spending time and money to make the real thing Used to illustrate theories and build scientific knowledge

6 Measurement International System of Units (SI) - metric system; based on #10 Length - meter Volume - liter (or cm 3 ) Mass - gram Temperature - celsus or Kelvin Kilo--> BASE UNIT --> centi --> milli LARGE -----------------> SMALL International System of Units (SI) - metric system; based on #10 Length - meter Volume - liter (or cm 3 ) Mass - gram Temperature - celsus or Kelvin Kilo--> BASE UNIT --> centi --> milli LARGE -----------------> SMALL

7 Calculations Area (cm 2 ) = length (cm) X width (cm) Volume (cm 3 ) = length (cm) X width (cm) X depth (cm) * for a solid use cm 3 * for a liquid use mL * use the displacement of a liquid an irregular shaped object is placed in (Ex. The peanut butter cookie recipe!) Density (g/cm 3 or g/mL) = mass (g)/volume (cm 3 or mL) Area (cm 2 ) = length (cm) X width (cm) Volume (cm 3 ) = length (cm) X width (cm) X depth (cm) * for a solid use cm 3 * for a liquid use mL * use the displacement of a liquid an irregular shaped object is placed in (Ex. The peanut butter cookie recipe!) Density (g/cm 3 or g/mL) = mass (g)/volume (cm 3 or mL)


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