Another exciting day in the sixth period chemistry class

Today at the beginning of class, Mr. Lieberman handed back our labs and quizzes. The latter he claimed was a gift to get our hopes up, soon to be crushed by our next quiz on Wednesday. And frankly, i wouldn't put it past him. However, at least he was honest.

We then had a very pleasant surprise: a shootout between Ben, Brandon, and Kaitlin, aiming at a target on the screen using Mr. Lieberman's handy-dandy uzzi-- which is a gun for those of us who don't know. The competition went smoothly except for a single misfire, which thankfully did not harm anybody. The result was a tie between Brandon and Ben each with one point, and Kaitlin in second with zero.

now a few definitions:

• Accurate: hitting what you are aiming for (the target)
• Precise: being consistent every time; your work is reproducible

Nobody was accurate, because nobody hit the bullseye. However Kaitlin was at least precise, hitting the same spot on the floor every time.

Other than that, today was a typical day in the classroom: lecture notes.

We now (in theory) know the metric system: 1g=10dg=100cg=1,000mg=1,000,000um (micrograms)=1,000,000,000 ng=1,000,000,000,000 pg=.001 kg.

The hierarchy of metric prefixes goes like this:

kilo=1000

(none)=1

deci= 1/10

centi= 1/100

milli = 1/1,000

micro= 1/1,000,000

nano= 1/1,000,000,000

pico= 1/1,000,000,000,000

And there is mega and giga and tera, but if you care about those, you probably know what they mean.

We also learned about temperature: Scientist use celsius, in some cases they use kelvin, we use farenheit. The conversion equation is: t(f)=9/5c+32. The way I remember it is how to get from 100 to 212 using 9/5 and 32: multiple by 9/5 to get 180, add 32 to get 212, maybe that helps.

And last but probably not least, taking measurements: Always estimate one digit past the last readable digit. So that means if you are measuring in millimeters, you want to measure to the point "x". If a box happens to be about 11 mm, plus a tiny bit, you would record 11.1 mm.

If you did not understand this I am embedding the notes for todays lecture here:

| Get your SlideShare Playlist

YUS, it worked. If you do not understand, comment.

This is Matt P, and always will be.

Michelle T. you have been privileged with the honor of being our next scribe.

All Powerful Atoms

Representing Matter

View more presentations from gbsliebs2002.

Today in Mr. Lieberman class we started off the day with a quick congrats to Emilio on his post, and also talked about how to upload photos onto the blog. During the beginning of class a few students mentioned they forgot to do the ChemThink assignment Particulate Nature of Matter assigned the night before. So, Mr. Lieberman said if you could finish it before it was graded it would count as a full grade, so hurry to do it before he checks. Lastly, Mr. Lieberman collected all of the classes "Observation Labs". If you missed today’s class expect to turn it into to him tomorrow. Mr. Lieberman also notified us that our Web assign homework and safety tests were graded, and you can log on to see your grade. Next, we proceeded to take notes on our first unit. These notes included the fundamental unit of Chemistry the Atom. Also, in the notes we went over elements, molecules, and compounds for example Splenda or, Sweet and

Low. First of all an element is the simplest of pure substacnes. Which, brings us to what a pure substance is. A pure substance is a substance made out of all the same elements or compounds or mixtures. For example gold. Also, a pure substance cannot be seperated into smaller substances. We also learned about compunds. Compounds are a molecule that has two different kinds of atoms in it like oxygen and hydrogen. Next, we learned about mixtures which, are compnents that retain their own identity, and can be seperated physcially. Mr. Lieberman taught us an acronim to learn the 7 different diatomic elements (diatomic means two atoms,) HONClBrIF. This stands for Hydrogen, Oxygen, Nitrogen, Chlorine, Bromine, Iodine, and Flourine.

We also learned about pure substances, classification, mixtures, Homogenous mixtures, and Heterogeneous mixtures. During the notes Mr. Lieberman told us a few fun facts for instance we learned that lead's Latin name is plumbum. So, plumbers got their name when they worked in Rome on the aqueducts, which used lead. The class notes are represented above this blog post.

After this we began our Paper Clip Activity. In this activity we had to use colored,

small, and jumbo paperclips to compose atoms. We were given a partner to complete all of the atom molecule combination problems, and then Mr. Lieberman had checked off our your creations. There are five sample questions to complete for homework tonight.

Finally, Mr. Lieberman assigned us a Pre-Lab for tomorrow’s lab "Separating Mixtures". Make sure you get that done for tonight’s homework. The next scribe shall be Aaron G