September 27th

Today we had our quiz on......

• Unit Conversions + Scientific Notation.
• SI Prefixes & Conversion Factors.
• *Also had a bonus question at the end that was associated with Norton*

Before we had our quiz we spent around 20 min. on starting our new subject...Matter!

Here are some facts about Matter:

• Matter is anything that has mass and takes up space (like us)...in other words, it has volume
• Matter is made up of two things: Pure Substances and Mixtures

Pure substances can't be physically broken down into simpler substances. They have one set of properties, and one kind of particle. They can either be elements, or compounds.

Mixtures contain more than one set of properties. They are either homogeneous, which means they only have one components to them, or heterogeneous, which means that they are made of several different components.

We also reviewed the differences between Physical Change and Chemical Change:



Don't waste paper...



1) Physical Change:

In a physical change, only the appearance of the object changes. No new products are formed. For example, if you crumple up a piece of paper, it will now look completely different, but it's properties are still that of the original piece of paper.

Remember:

In a physical change:

1. No new substance is formed.
2. Chemical composition does not change
3. Reversible (think of the boiling point and melting point)

2) Chemical Change:



This guy has just created a new substance from burnt
paper.



In a chemical change, the object might not only end up looking different, but will create new products out of the reaction as well. Some clues that a chemical change took place are the release of light, odor, or heat. If you take a new piece of paper and burn it, that's a chemical change, because you have added heat to the paper and created a new substance, which is no longer paper.

Remember:

In a chemical change:

1. New substances are produced.
2. It is irreversible (for example, you can't "unburn" something).

And lastly a few more properties of matter:

• It is neither created nor destroyed, only changed from one form to another
• There are three states of matter: Solid, Liquid, and Gas

Extras:

^ Here's a neat little song about Physical and Chemical changes...the next big hit?

Elements, Compounds, and Mixtures Quiz

^ Test your knowledge on elements, compounds, and mixtures with this little quiz!


For next class, we are going to be doing a lab which is called:

Experiment 2C: Chemical and Physical Change

HW:

• Bring lab textbook to next class for the lab, DON'T FORGET!!!!
• On pg.18, make a flow chart of the instructions/procedure otherwise you will not be able to complete the lab (and you have to sit and watch everyone else...)
• On the bottom of pg. 19, copy the chart on a separate white sheet of paper.
• Lastly, read the lab and instructions/procedures so you are prepared for next class.

Thank you and Good Night :)