Super Fun Lab



An example of physical change



Before we did the super fun lab, we had to do a few pre-lab questions.  These questions were the following

1.Whats the difference between chemical and physical change?

2.Identify which of these are chemical changes or physical changes

a.burning wood  b.distillation of oil  c.formation of ice  d.leaves changing colour

3.List the properties of chemical change

4.What is the purpose of the glass square



An exmaple of a chemical change



     

 

Then we had the super fun lab.  We had to get: 4 test tubes, a test tube rack, a glass square, 4 eye droppers, and these super cool looking goggles that totally felt comfortable on your head, in order to start the lab.  To start the lab, Ms. Chen gave everyone 4 unknown solutions later which we will label each A, B, C, and D.  Using the glass square we mixed all the unknown solutions together in every possible way (only two solutions were allowed to be combined) and recorded all the information on the changes we saw in a chart.  During the experiment we noticed many chemical and physical changes such as a change in colour and changing the liquid from a visibly clear mixture to a mirky and cloudy mixture.  After successfully conducting the experiments we proceeded to the next step, washing our hands, equipment, and our station.

    After that super fun lab we got a handout depicting on how we should do our labs.  On the sheet provided it showed us that we had to do a cover sheet a.k.a. a title page and a report write up.  Doesnt that sound like so much fun? yeah it is fun.  Then for the last 30 minutes of class, we had the time to start the super fun report write up.  Yay.  This was such a fun class!

 

So does matter matter?

Today we started to learn about matter. So does matter matter? To be honest no, but for our own good it does. So let’s start.

 What is matter? a thing? an object? Well they are all matter because anything that has mass and take up space is consider matter.  As I think about the definition of a matter an interesting thing came up to me, so is light considered matter? Short answer yes, long answer is before Einstein came up with his famous equation light isn't matter but after him the definition of matter changed so yes light is also considered matter.

 Back to topic, Matter is divided in to 2 sections Pure substance and Mixtures. Pure substance is as its name says "PURE" substance which mean it ONLY contains one kind of particle and of course all the particles have the same properties. Mixtures on the other hand is made out of more than one substance and because it isn't just one substance it have properties that the other substances have.

Pure substance is then divided into two other sections Elements and Compounds. Elements is basically the periodic table, therefore they are the simplest form and can't not be decomposed. Examples are metals, non-metals, and Metalloid. When we put a few elements together, with a bit of energy, and some abracadabra, BOOM they become what we know as compounds. In compound's universe the smallest one of them is called Molecule (I wonder where the word mole theory come from...) of course our favorite molecule is H2O!!!!!

Mixtures is also divided in two sections. Homogeneous haha... homo... no. Homo as a prefix means same and geneous is a Latin word for genius together they make homogeneous which is a substance that is uniform throughout, it appears to have only one component. Example would be salt water, coffee and other things. The other types appears also to be a geneous. Except it have the exact opposite meaning of homogeneous. Meaning not uniform throughout and appears to have more than one substance. Example would be orange juice with pulp yummm.

Changing matter

Physical change	Chemical change
NO new substance is formed Chemical composition stays the same reversible	New substance are produced Irreversible Example would be cooking

Important rules:
Matter is neither created nor destroyed from one form to another

There are 3 states of matter

Solid	Rigid, don’t change shape easily and experience small changes in volume when heated
Liquid	Takes the shape of the container and experiences slight changes in volume when heated
gases	Takes the shape of the container and experience drastic changes in volume when heated

Practice Quiz

In class, we had a practice quiz on unit conversion and scientific notation. Why, you ask? To prepare us for the actual quiz on unit conversion and scientific notation, hence the term "practice quiz".

That's not the image loading, that's actually just a blank image. It's nothing. It represents the nothingness that we did after the practice quiz which took about half the class. Sooo... yeah....

Unit conversions with Squares and Cubes

Two main topics were discussed and learned from today's lesson. A new calculator function and unitary conversion withs squares and cubes.

A) The EXP/10^x function. We were shown a simple way to calculate with scientific notation using our calculators. By entering the non notational value and then using this function followed by entering the desired power of 10, we can calculate more easily and more precisely.

B) Since 1000m = 1km, 1,000,000m² = 1km²
This is because 1km² means 1000m * 1000m

Same goes for volume.
Since 1000m = 1km, 10⁹m³ = 1km³
(1000m * 1000m * 1000m) or (10³ * 10³ * 10³)

Example with Cubes:

Convert 8.1cm³ to m³

1m³ = 10²cm * 10²cm * 10²cm = 10⁶cm³

Since we are converting from a smaller unit to a larger one, it must be a negative power of 10

8.1 * 10^-6 m² or 0.0000081

Example with Squares:

Convert 4.3dm² to Gm²

1m² = 10dm * 10dm = 10²dm²

4.3 * 10^-2

1Gm² = 10⁹m * 10⁹m = 10¹⁸m²

4.3* 10^-2 * 10^-18 = 4.3 * 10^-20