Unit 2 Test Study Guide

In addition to the things posted below about the Atom, you need to know the four states of matter:
Solids
Liquids
Gases
and Plasma

"Uhh, Mr. Finke...what is Plasma?"

Something we haven't studied that you really at this point only need to know is the fourth type of matter. Plasma= fourth type of matter that won't get talked about again for quite some time, just know it.

The little molecules in Solids do not move around but do vibrate in place. A lot like a very well-behaved class of kindergarteners. Sitting in one place.......but still vibrating. That is why solid stuff holds its shape.

The little molecules that make up Liquids do move around and are still fairly close together. They will move around and take the shape of whatever container they are poured into.

The molecules that make up Gases are moving around very rapidly and are very far apart. They will keep spreading apart until something stops them from spreading apart.

You should be able to draw the little boxes that we sketched in class that show the movement of the molecules for each state of matter. You can read up on these three states here.

Finally, you must know that water's boiling point in degrees Celsius is 100. Water freezes at 0 degrees Celsius. As we add energy to a substance (like water), the molecules move faster and the substance heats up. As we take away energy from a substance (like water), the molecules move slower and the substance cools down.