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Matter And Measurement Chapter 1 Introduction: Matter and Measurement.

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Presentation on theme: "Matter And Measurement Chapter 1 Introduction: Matter and Measurement."— Presentation transcript:

1 Matter And Measurement Chapter 1 Introduction: Matter and Measurement

2 Matter And Measurement Chemistry: The study of ____(1)___ and the ___(2)___ it undergoes.

3 Matter And Measurement Scientific Method: A systematic approach to solving problems.

4 Matter And Measurement Matter: Anything that has mass and takes up space.

5 Matter And Measurement Matter ___(3)___ are the building blocks of matter. Each ___(4)___ is made of the same kind of atom. A ___(5)___ is made of two or more different kinds of elements.

6 Matter And Measurement States of Matter

7 Matter And Measurement Classification of Matter

8 Matter And Measurement Mixtures and Compounds

9 Matter And Measurement Properties and Changes of Matter

10 Matter And Measurement Properties of Matter ___(6)___ Properties: □Can be observed without changing a substance into another substance. Boiling point, density, mass, volume, etc. ___(7)___ Properties: □Can only be observed when a substance is changed into another substance. Flammability, corrosiveness, reactivity with acid, etc.

11 Matter And Measurement Properties of Matter ___(8)___ Properties: □Independent of the amount of the substance that is present. Density, boiling point, color, etc. ___(9)___ Properties: □Dependent upon the amount of the substance present. Mass, volume, energy, etc.

12 Matter And Measurement Changes of Matter ___(10)___ Changes: □Changes in matter that do not change the composition of a substance. Changes of state, temperature, volume, etc. ___(11)___ Changes: □Changes that result in new substances. Combustion, oxidation, decomposition, etc.

13 Matter And Measurement Chemical Reactions In the course of a chemical reaction, the reacting substances are converted to new substances.

14 Matter And Measurement Chemical Reactions

15 Matter And Measurement Compounds ___(12)___ can be broken down into more elemental particles.

16 Matter And Measurement Electrolysis of Water

17 Matter And Measurement Separation of Mixtures

18 Matter And Measurement ___(13)___: Separates homogeneous mixture on the basis of differences in boiling point.

19 Matter And Measurement Distillation

20 Matter And Measurement ___(14)___: Separates solid substances from liquids and solutions.

21 Matter And Measurement ___(15)___: Separates substances on the basis of differences in solubility in a solvent.

22 Matter And Measurement Units of Measurement

23 Matter And Measurement SI Units Système International d’Unités Uses a different base unit for each quantity

24 Matter And Measurement Metric System Prefixes convert the base units into units that are appropriate for the item being measured.

25 Matter And Measurement Volume The most commonly used metric units for volume are the ___(16)___ (L) and the milliliter (mL). □A liter is a cube 1 dm long on each side. □A milliliter is a cube 1 cm long on each side.

26 Matter And Measurement Uncertainty in Measurements Different measuring devices have different uses and different degrees of accuracy.

27 Matter And Measurement Temperature: A measure of the average ___(17)___ of the particles in a sample.

28 Matter And Measurement Temperature In scientific measurements, the Celsius and Kelvin scales are most often used. The ___(18)___ scale is based on the properties of water. □0  C is the freezing point of water. □100  C is the boiling point of water.

29 Matter And Measurement Temperature The ___(19)___ is the SI unit of temperature. It is based on the properties of gases. There are no negative Kelvin temperatures. K =  C + 273.15

30 Matter And Measurement Density: Physical property of a substance d=d= mVmV

31 Matter And Measurement Uncertainty in Measurement

32 Matter And Measurement Significant Figures The term ___(20)___ refers to digits that were measured. When rounding calculated numbers, we pay attention to significant figures so we do not overstate the accuracy of our answers.

33 Matter And Measurement Significant Figures 1.All nonzero digits are significant. 2.Zeroes between two significant figures are themselves significant. 3.Zeroes at the beginning of a number are never significant. 4.Zeroes at the end of a number are significant if a decimal point is written in the number.

34 Matter And Measurement Significant Figures When addition or subtraction is performed, answers are rounded to the least significant ___(21)___. When multiplication or division is performed, answers are rounded to the number of digits that corresponds to the least number of significant figures in any of the numbers used in the calculation.

35 Matter And Measurement Accuracy versus Precision ___(22)___ refers to the proximity of a measurement to the true value of a quantity. ___(23)___ refers to the proximity of several measurements to each other.


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