Do NowHow many grams are in one kg?

1000

How many slices are in a pizza?varies

How many cm are in an inch (from lab)?2.54

Dimensional AnalysisUnit 1: Matter & Measurement

English-> SI Conversions

Common Conversions 1.06 quart = 1 Liter

1quart = 946 mL

1 pound = 454 grams

1kg = 2.2 lbs

1 inch = 2.54 cm

1 cm3 = 1mL

CONVERSION FACTORSRatio of two equivalent

measurements-Used to convert between systems

Conversion Factors

HAVE

WANT

Let’s Practice7 grams= _____lbs?

Want= lbsHave= grams

7g x1 lb

454g

=0.02 lbs

Why Does This Work? The given units (what you have) are

canceled out!

7g x1 lb

454g

=0.02 lbs

Let’s Practice

19L = _____quarts?Want= quartsHave = Liters

19Lx1.06 quart

1L=20 quarts

Let’s Practice9.5 inches = ______ cm?

Want = cmHave = inches

9.5 inx2.54 cm1 in

=24.13 cm

Your Height What is your height in

inches? **HINT** 5 feet = 60 inches

Convert your height in inches to centimeters.

Then convert your height in centimeters to meters.

62 inches

62 inches X 1 inch 2.54 cm

= 157.48 cm

K H D B D C M

Move the decimal 2 places to the left.= 1.5748 m

Upcoming Quiz Tomorrow 9/18!

Metrics Quiz Metric-metric conversions (KHDBDCM) Sig Figs

Upcoming Homework HW 1.7 - Online Homework (Temperature & Density

Calculations) due TONIGHT 9/17 8pm

HW 1.8 - Read p. 34-37, 42-43, & 48 by Thurs. 9/18/14

HW 1.9 - Read p. 38-39 & 44-47 by Fri. 9/19/14

HW 1.10 - Online Homework (Describing Matter) due Fri. 9/19 8pm

HW 1.11 - Read p. 40-41 by Mon. 9/22/14

HW 1.12 - Read p. 49-50 by Tues. 9/23/14

Properties of MatterUnit 1: Measurement & Matter

Aim: Does matter matter?

From the HW… Which is heavier: a ton of feathers or a

ton of bowling balls?

THEY ARE THE SAME!!

Do Now Describe Beyoncé

Matteranything that has mass and takes up space

States of MatterGas Liquid Solid

Particle Model

Properties Gas Liquid SolidParticle Movement“free to move” or“fixed position”Shape“definite” or “takes the shape of the container”

Volume“definite” or “takes the volume of the container”

Free to move

Free to move

Fixed position

Takes the shape of the container

Takes the shape of the container

Definite shape

Takes the volume of the container

Definite volume

Definite volume

Properties used to describe matter; characteristics by

which a substance is recognized

Extensive Depend on amount of matter present

ie: volume, mass, length, width, etc

Intensive ONLY depends on type of matter present

ie: boiling and melting points; density Used to identify substances

Physical propertyQuality or condition of a substance that can be observed/measured without changing the substance’s composition

ie: color, taste, luster, malleable, conductivity

Chemical properties Describe how a substance interacts (or

doesn’t interact) in the presence of another substance to produce new substances

Out with the old-> in with the new

ie: iron reacts with air and forms rust; nitrogen gas really doesn’t react with much of anything under most conditions

Matter changes

Nothing stays the same

Of course scientists have categories for that too!

Physical Changeswhen the state or form of matter is changed without changing its chemical properties or composition.

Examples: cutting, freezing, melting, etc.

Chemical Change

change that produces 1+ new substances that differ in chemical properties and composition from the original substance.

Name That Change!!

Think= silently to yourself and decide what type of change is represented by the slide

Share=class vote

ice melting

burning a chemistry book

melting iron

frying an egg

fireworks exploding in the sky

turning wood into a baseball bat

baking a cake

sharpening a pencil

carving a watermelon into a creepy looking face

pouring liquid nitrogen into a bowl and watching it vaporize

sulfuric acid added to sugar

http://www.youtube.com/watch?v=nqDHwd9rG0s

You Decide…

Read the following paragraph to answer questions 1 and 2:

A match is lit and held under a cold piece of metal. The following observations are made:The match burns. The metal gets warmer. Water condenses on the metal. Black soot (carbon) is deposited on the metal.

1. What is one physical change from the above paragraph? Why is it a physical change?

 2. What is one chemical change from the above paragraph? Why is it a chemical change?

In Conclusion…How can scientists describe matter?

Propertieso Extensive & intensiveo Physical & chemical

Changeso Physical & chemical

Elements to Memorize Know the element name & symbol!

Hydrogen = Iron = Au = He =

Quiz on Wednesday 9/24

H

Fe

Gold

Helium

Upcoming HomeworkHW 1.9 - Read p. 38-39 & 44-47 by Fri.

9/19/14

HW 1.10 - Online Homework (Describing Matter) due Fri. 9/19 8pm

HW 1.11 - Read p. 40-41 by Mon. 9/22/14

HW 1.12 - Read p. 49-50 by Tues. 9/23/14