Do Now: # 4 - Notes on Mass, Volume and Density

Convert the following metric units.


1. convert 4.56 Liters into mL

2. convert .0134 kilometers into millimeters

1.     .000154 centimeters into kilometers

2.      The average distance to the Sun is 149,597,887.5 km. Astronomers call this distance 1 astronomical
unit (or AU).   How many millimeters is it to the sun?




Once you finish the DO NOW - you should take down the notes on the board about mass, volume and density.

Mass:  Measure of the amount of matter in an object.  Matter is the stuff that things are made from, protons, neutrons, electrons, etc.

Mass base unit is grams. Mass and weight are different.  Weight changes as the force of gravity changes.  Mass is always the same.  Therefore you would weigh different amounts on the moon but you have the same mass on the moon.  Mass is not affected by gravity.

Volume: Measure of the amount of space an object takes up.  Either measured by cubic units of length or Liters. 

Meniscus = curved line caused by surface tension.  You should always measure the bottom of the meniscus.
 


Density:  Is a ratio between an object's mass and its volume.  It is the mass per unit volume.  It tells us how tightly the matter is packed into an object.  The more dense an object the more matter it has per unit volume, ie: the more protons, neutrons and electrons it has. 


LAB NOTEBOOKS:

 Question:  How can I find the density of an unknown substance?

Write down your question, hypothesis, and procedures (bullet points)prior to beginning.  You should have a data table prior to beginning as you should anticipate what data you would like to collect. Diagram your set up.  Each student needs to have this in their notebook.  Clearly label your sections. 


Then your job is to find the density of of the unknown solution. 


I have assigned your groups by random selection.  There will be no switching.


Good Luck. 

Hw: Read Chapter 1, section 1 and 4 and do the sections reviews on page 10 and 27.

Procedure:  You will be finding the mass and volume of objects to determine their density.

1. gather supplies, triple beam balance and 100mL graduated cylinder
2.zero your balance
3. mass the empty 100 mL graduated cylinder (g.c.) - record data into your data table
4. obtain sample of unknown liquid in your g.c.
5. mass the sample of liquid in the g.c. - record into your data table
6. subtract the mass of empty g.c. from the mass of g.c. + liquid this give you the mass of the ___________.
7. record the volume of liquid you have in your data table
8. calculate the density.
9 repeat the procedure for the second liquid.

Data Table:

	Mass of g.c.	Mass of g.c.+ liquid	Mass of liquid	Volume	density
Blue liquid
Red liquid

Welcome Back To School- 1st blog assignment

I am very excited to be your science teacher and share with you my joy for scientific inquiry and thinking. There is so much we can learn from the field of science and yet so much to be discovered. Let the journey begin.

Your first blog assignment is to read about and explain any one unit of measurement from the dictionary of measurement and explain it in your post.  Some are quite complicated others are quite simple just choose any one of your liking  and tell us about it.   Maybe you want to choose something you have always heard about but never really knew what it meant.  Ex:  What is a terabyte?  See Below.


You will be graded on grammar and that you properly put your name on your post (follow directions tab at the top of blog - how to post.)

Here is the web address in case you can't link. http://www.unc.edu/~rowlett/units/

tera- (T-)

a metric prefix meaning 10¹², or one trillion. The prefix was derived from the Greek word for monster, teras. (Our words "terrible" and "terrific" have this same root.) The three prefixes mega-, giga-, and tera- thus mean something like "huge," "gigantic," and "monstrous," respectively. But also, and apparently by coincidence, the prefix tera- suggests the Greek tetra, meaning 4. This is significant because tera- is the fourth prefix, following kilo-, mega-, and giga-, in the list of SI prefixes for multiples of 1000ⁿ. This coincidence was exploited in defining the subsequent prefixes peta-, exa-, zetta-, and yotta-, corresponding to the powers n = 5 through 8 in 1000ⁿ, so that they suggest the Greek numbers penta, hexa, hepta, and okta for 5, 6, 7, and 8, respectively.

byte (B)

a unit of information used in computer engineering. Technically the byte is a unit of addressable memory, and its size can vary depending on the machine or the computing language. However, in most contexts the byte is equal to 8 bits (or 1 octet). This means that a byte has 2⁸ = 256 possible states. The unit was named by IBM engineer Werner Buchholz in 1956, and the 8-bit size was popularized starting in 1964 by IBM's System 360, a top-selling mainframe computer. The spelling "byte" is used instead of "bite" in order to avoid confusion with the bit.