PHASES OF MATTER
Air molecules, the more you put in the bottle, the more compact they become and the bottle expands because it is being pushed on.
When weighing two plastic soda bottles, the one with more air pumped into it weighs more than the other.
Another example of this would be to weigh two balloons, one blown up with air. The balloons can be tied to opposite ends of a coat hanger by a piece of string. Whichever side of the hanger that lowers is the one that weighs the most. In this case, the blown up balloon will weigh the most because air does take up space and has weight.
When weighing two plastic soda bottles, the one with more air pumped into it weighs more than the other.
Another example of this would be to weigh two balloons, one blown up with air. The balloons can be tied to opposite ends of a coat hanger by a piece of string. Whichever side of the hanger that lowers is the one that weighs the most. In this case, the blown up balloon will weigh the most because air does take up space and has weight.
Solid
Liquid
Gas
Definite volume (can't compress): solid, liquid
Fill any container (can compress): gas
Take shape of container: liquid, gas
Definite shape: solid
Play with the changes of matter: http://phet.colorado.edu/en/simulation/states-of-matter-basics
- Fills container
- Has mass
- Not compressible
- Stays same shape
Liquid
- Takes shape of container
- Has mass
- Cannot compress, already tight (ex: a cup will overflow)
Gas
- Fills container
- Can compress, make it tighter packed
- Molecules will spread out if given the chance, don't prefer to be tightly packed (ex: When you take the lid off of a bottle full of air, it makes a sound as the air is quickly released.)
Definite volume (can't compress): solid, liquid
Fill any container (can compress): gas
Take shape of container: liquid, gas
Definite shape: solid
Play with the changes of matter: http://phet.colorado.edu/en/simulation/states-of-matter-basics
Evaporation
- 2 trays, 2 graduated cylinders, 2 wide beakers
- Record the amount of water you initially put in each of these containers. Put different amounts of water in the graduated cylinders and the beakers.
- Put the same amount of water in both of the trays, but cover one with plastic wrap.
- Let containers sit for one week and have the students measure how much water is still there. Then they will be able to determine what factors affect evaporation.
Freezing
- When liquid water cools and freezes, the molecules slow down and expand into a six sided figure.
- This is what forms ice.
- For this reason, ice takes up more space than liquid water does.
- We found this out by completely filling a plastic container with water and putting the lid on.
- We left it in the freezer and when we checked on it again the next week, the ice had busted the plastic and we saw how ice took up more space due to expansion.
- Water phases: http://www.chamotlabs.com/Phases.html
Plasma
- Plasma is the 4th state of matter.
- It is so hot that we can only see it in super skinny lines.
- Otherwise, it would harm our eyes, like the sun.
Food Coloring in Hot and Cold Water
- Pour boiling water in one cup and ice water in the other.
- Put 5 drops of food coloring in each one.
- Watch as the food coloring in the hot water expands and spreads out faster than it does in the cold water.
Oobleck
- 1 cup water, 1.5-2 cups corn starch, and a few drops of food coloring of your choice
- non-newtonian fluid
- It acts like a liquid when being poured, but like a solid when a force is acting on it. You can grab it and then it will ooze out of your hands.