Measurement and matter
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Measurement and matter

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  • Image courtesy: www.uwf.edu/chemistry/ \n\nIntroduction to Chemistry\n \n1.       What is chemistry?\n2.       What are the four parts of the scientific method?\n3.       What is a control experiment?\n4.       Describe the three types of variables.\n5.       Compare laws, theories, and hypotheses.\n6.       What is the only way to prove a hypothesis true?\n7.       Why do laws and theories evolve?\n8.       What is the last step of solving any problem?\n9.       What is measurement?\n10.     What is a dimension?\n11.     What is a unit?\n12.     What is the difference between fundamental and derived units?\n13.     Why is the standard for mass, in the SI, unique?\n14.     What is the difference between mass and moles?\n15.     Is density a fundamental or derived unit?\n16.     How is a conversion factor made?\n17.     How is one unit converted to another?\n18.     What is precision?\n19.     What do the significant figures of a measurement indicate?\n20.     In what situation are trailing zeros always significant.\n21.     Numbers in scientific notation have the basic form A x10B. What is the range of A?\n22.     What kind of number will have a negative B?\n23.     Why do scientists use graphs?\n24.     What variables go on which of the axes of a graph?\n25.     How do direct and inverse relationships differ?\n26.     Describe the graph of a direct linear relationship.\n27.     Describe the graph of an inverse parabolic relationship.\n28.     What is the slope of a horizontal line?\n29.     In an experiment the independent variable does not change. What is the slope of the graph?\n30.     During a lab experiment the temperature of the gas in a balloon is varied and the volume is measured. \n Which of the two variables will be graphed on the horizontal axis and which will be graphed on the vertical axis?\n31.     What kind of relationship exists between P and z in this equation? P = mv/z2\n
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Measurement and matter Measurement and matter Presentation Transcript

  • DO NOW1) What do the three images below have in common?2) What is different about the three images?3) Which of the images contains water (H2O)? 1. 2. 3.
  • Intro to Chemistry
  • Today’s ObjectivesStudents will be able to.... - describe lab safety rules - identify lab tools and explain whatvariables are measured with each tool- identify the 3 states of matter
  • Basic Safety Rules#1 Rule:
  • Basic Safety Rules#1 Rule: Use common sense.
  • Basic Safety Rules#1 Rule: Use common sense.Others:
  • Basic Safety Rules#1 Rule: Use common sense.Others:No horseplay in LAB!
  • Basic Safety Rules#1 Rule: Use common sense.Others:No horseplay in LAB!Follow written/oral directions.
  • Basic Safety Rules#1 Rule: Use common sense.Others:No horseplay in LAB!Follow written/oral directions.Handle chemicals/glassware with respect.
  • Measurements Measurement provides QUANTITATIVEinformation to QUALITATIVE observations.Example: “You are tall” = Qualitative“You are 5 ft and 6 inches tall” = Quantitative Measurements always have 2 parts 1) a Number/# 2) a Unit
  • Units Of Measurement You Must KnowUse SI units — based on the metric system  Length  Mass  Volume  Time  Temperature
  • Units Of Measurement You Must KnowUse SI units — based on the metric system  Length meter, m  Mass  Volume  Time  Temperature
  • Units Of Measurement You Must KnowUse SI units — based on the metric system  Length meter, m  Mass kilogram, kg  Volume  Time  Temperature
  • Units Of Measurement You Must KnowUse SI units — based on the metric system  Length meter, m  Mass kilogram, kg  Volume liter, L  Time  Temperature
  • Units Of Measurement You Must KnowUse SI units — based on the metric system  Length meter, m  Mass kilogram, kg  Volume liter, L  Time seconds, s  Temperature
  • Units Of Measurement You Must KnowUse SI units — based on the metric system  Length meter, m  Mass kilogram, kg  Volume liter, L  Time seconds, s  Temperature kelvin, K
  • Measuring in the Chemistry Lab Volume Length Temperature Mass
  • Graduated Cylinder and BeakersGraduated cylinders and beakers are used tomeasure the Volume of liquids. Example Unitsof Volume are Liters (L), Milliliters (mL) andcubic centimeters (cm3)
  • Meter Stick or RulerA meter stick or ruler is used to measure Length.Example Units of Length are Meters (m),Centimeters (cm), and Feet (ft)
  • ThermometerA thermometer is used to measure theTemperature of substances. Example Unitsof Temperature are Celsius (oC), oFarenheight ( F) and Kelvin (K)
  • Electronic BalanceAn electronic balance is used to measure Mass.Example Units for Mass are grams (g), kilograms(kg) and ounces (oz)
  • Chemistry is the study of matterand the transformations matter can undergo…
  • Chemistry is the study of matterand the transformations matter can undergo…
  • …Matter is anything that occupies space.
  • …Matter is anything that occupies space.
  • …Matter is anything that occupies space. Chemistry with a Purpose
  • States of MatterSlide of 19 General Chemistry: Chapter 1 Prentice-Hall © 2002
  • Can Matter Change States?
  • • Melting: Solid Liquid• Solidification: Liquid Solid• Evaporation: Liquid Gas• Condensation: Gas Liquid• Sublimation: Solid Gas• Deposition: Gas Solid
  • Classification of MatterSlide of 19 General Chemistry: Chapter 1 Prentice-Hall © 2002