1. Matter and its changes

2. Create a chemical reaction in a closed system Carbon Dioxide Sandwich

3. So how does all this work? Lets begin with the behavior of gas………..

4. Measuring Gases How much Helium is in this tank? Can you just simply Measure the volume of the tank to get the answer. No. gases easily squeeze together or they can easily spread out. To fill the thank, helium was compressed, or pressed together tightly. The helium in this tank can inflate balloons with a volume much greater than the tank. The actual volume you get, depends on the temperature and air pressure outside. So how do you measure gas?

5. Volume: the amount of space that matter fills Because gases fill the space available, the volume of a gas is the same as the volume of its container. volume: Measures in cubic centimeters, millimeters, liters and other units.

6. temperature In a solid, liquid or gas particles are constantly moving. Temperature if added these particles (atoms) speed up. When they speed up, they have a desire to spread apart. This means a solids atoms will move apart to become liquid. A liquids atoms will move apart to become a gas. Temperature is a measure of the average energy of motion of the particles of a substance. The faster the particles are moving the greater their energy and the higher the temperature. The particles of a typical gas at room temperature will move at about 500 meters per second. http://www.glencoe.com/sites/common_assets/science/virtual_labs/E17/E17.swf

7. Pressure Gas particles are moving so they constantly collide with one another. They also collide with the walls of their container. As a result, the gas exerts an outward push on the walls on the container. The pressure of the gas is the force of its outward push.

8. The firmness of an object inflated with gas, such as a soccer ball, comes from the pressure of the gas. If the gas (in this case, air) leaks out of the ball, the pressure decreases and the ball becomes softer. A gas flows from an area of high pressure to an area of low pressure. The air inside the ball is at higher pressure than the air outside. When the ball is punctured the gas particles inside the ball hit the hole with tremendous force and fly out. But since the gas particles on the outside have more room to move there are fewer around the ball than what is coming out, so there is no chance for particle to enter.

9. Pressure and Volume The relationship between the pressure and volume of a gas at constant temperature is named Boyle’s Law. When the pressure of a gas increases, its volume decreases. (atoms are spread out so there is room in-between the atoms) When the pressure of a gas decreases, its volume increases. (atoms are closer together, not pushing on the outside of the container not space between atoms)

10. Pressure and temperature Gas particles travel individually at high speeds. The greater the speed of the particles the more they collide with each other. With more collision there is more pressure. Temperature is the measure of the speed of the particle of a gas. The higher the temperature the faster the gas particles move. When the temperature of gas increases, its pressure increases. When the temperature of gas decreases, it pressure decreases. http://www.glencoe.com/sites/common_assets/science/virtual_labs/PS08/PS08.html

11. Crush Demonstration

12. Under Construction Chemistry is the study of properties of matter and how matter changes. *** property or characteristic of a substance that is observed during a reaction in which the chemical composition or identity of the substance is changed

13. Building Blocks of Matter Under construction