Ch. 2 - Measurement I. Units of Measurement (p.34-45)

Slides:

Advertisements

Similar presentations

Standards of Measurement Units and Standards 1.Standards – exact quantity that people agree to use for comparison 2.SI – standard system of.

Advertisements

Ch. 2 - Measurement I. Units of Measurement (p.34-45)

Units of Measurements Objectives: -Name SI units for length, mass, time, volume, and density -Perform density calculations.

Measurement I. Units of Measurement  Number vs. Quantity  SI Base Units & Prefixes  Derived Units  Density Calculations.

Section 2-2 Units of Measurement

The Metric System Is used in nearly every country around the world. The United States of America doesn’t use the metric system for it’s primary measurement.

Standards of Measurement

Metric System for Recording Measurments. Why do we use a standard system? So that measurements can be consistent among people from all over the world.

The Metric System Objective: Identifying what units are used for different measurements and how to convert measurements.

Metric Base Units Meter (m) – length Kilogram (kg) – mass Kelvin (K) – temperature Second (s) – time Mole (mol) – amount of substance.

Aim: What is mass and volume and how are they measured? Homework: 1. Name the quantity measured by each of the following SI units and give the SI symbol.

Metric System. SI System Standard International System of measurement – metrics Has seven base units and many other units derived from these seven.

Numbers and Measurement measurements often very small or very large to handle these numbers, we use scientific notation.

SI units prefixes deci centi milli micro nano kilo mega.

CHAPTER 1, SECTION 2 Standards of Measurement. IS AN EXACT QUANTITY THAT PEOPLE AGREE TO USE TO COMPARE MEASUREMENTS WHY WOULD A STANDARD BE IMPORTANT?

WARM UP 1.List the steps of the scientific method. 2.Write one sentence about whether theories or laws are better, and why.

Ch. 1a - The Nature of Science

I. Using Measurements (p )

Ch. 1 - The Nature of Science

Chapter 2 One of the key parts of the scientific method is the ability to make measurements. If I told you a measurement was What would be your.

Ch. 1 - The Nature of Science

Chapter 3 Scientific Measurement 3.2 Units of Measurement

Chapter 2 Preview Objectives Units of Measurement SI Measurement

II. Units of Measurement (p )

Measurement I. Units of Measurement (p.34-45) Number vs. Quantity

UNITS & DIMENSIONAL ANALYSIS (conversions)

أسئلة مراجعه للباب الأول Revision of Chapter 1 Matter & Measurements

Units of Measurement What are some different ways of measuring a person’s height? There are two major systems of units used today. Which one do we use.

Introduction: Matter and Measurement

1.2 Scientific Method.

II. Units of Measurement (p )

Measurement I. Units of Measurement Number vs. Quantity

Ch. 1- Measurement I. Units of Measurement Number vs. Quantity

CH. 2 - MEASUREMENT.

Unit Conversions MEASUREMENT

Using SI Units p

The Metric System and SI Units

III. Unit Conversions (p )

MEASUREMENT I. Units of Measurement.

INTERNATIONAL SYSTEM (SI) OF MEASURE

I. Units of Measurement Number vs. Quantity SI Base Units & Prefixes

MEASUREMENT Units of Measurement C. Johannesson.

Ch. 2 - Measurement I. Units of Measurement Number vs. Quantity

Metric Base Units Meter (m) – length Kilogram (kg) – mass

Dimensional Analysis, Significant Figures, & the Metric System

Metrics & SI Units.

Measurement I. Units of Measurement Number vs. Quantity

Measurement – The Metric System

Chapter 3 Scientific Measurement 3.2 Units of Measurement

Measurement I. Units of Measurement Number vs. Quantity

II. Units of Measurement (p. 12)

Intentions for success:

Making Measurements.

Density The ratio between the object’s mass and its volume.

The Metric System.

Measurement I. Units of Measurement Number vs. Quantity

Unit 2.2 Density.

THE METRIC SYSTEM.

The International System of Measurement (SI)

Measurement Units of Measurement Number vs. Quantity

Measurements, Conversions & Dimensional Analysis

Measurement and Chemistry.

Science Skills Ch 1 Notes.

II. Units of Measurement

MEASUREMENT Unit Conversions.

I. Units of Measurement (p )

Measurements and Calculations

Measurement I. Units of Measurement (p.34-45) Number vs. Quantity SI Base Units & Prefixes Derived Units Density Calculations.

Presentation transcript:

Ch. 2 - Measurement I. Units of Measurement (p.34-45) Number vs. Quantity SI Base Units & Prefixes Derived Units Density Calculations

A. Number vs. Quantity Quantity - number + unit UNITS MATTER!!

B. SI Units Quantity Base Unit Symbol Length meter m Mass kilogram kg Time second s Temp kelvin K Current ampere A

B. SI Units Prefix Symbol Factor mega- M 106 kilo- k 103 deci- d 10-1 centi- c 10-2 milli- m 10-3 micro-  10-6 nano- n 10-9 pico- p 10-12

D M V D = M V C. Derived Units Combination of base units. Volume - length  length  length 1 cm3 = 1 mL 1 dm3 = 1 L Density - mass per unit volume (g/cm3) D M V D = M V

D M V D. Density V = 825 cm3 M = DV D = 13.6 g/cm3 An object has a volume of 825 cm3 and a density of 13.6 g/cm3. Find its mass. GIVEN: V = 825 cm3 D = 13.6 g/cm3 M = ? WORK: M = DV M = (13.6 g/cm3)(825cm3) M = 11,220 g D M V

D M V D. Density D = 0.87 g/mL V = M V = ? M = 25 g V = 25 g 0.87 g/mL 1) A liquid has a density of 0.87 g/mL. What volume is occupied by 25 g of the liquid? GIVEN: D = 0.87 g/mL V = ? M = 25 g WORK: V = M D D M V V = 25 g 0.87 g/mL V = 28.7 mL

D M V D. Density M = 620 g D = M V = 753 cm3 D = ? D = 620 g 753 cm3 2) You have a sample with a mass of 620 g & a volume of 753 cm3. Find density. GIVEN: M = 620 g V = 753 cm3 D = ? WORK: D = M V D M V D = 620 g 753 cm3 D = 0.82 g/cm3