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 Beginner's Guide to Rockets Gas Properties Definitions Activity If so instructed by your teacher, print out a worksheet page for these problems. After reading the Web page Gas Properties Definitions, complete the questions shown below. Access additional Web pages from the Beginner's Guide to Rockets as needed. Additional Materials Needed: 2 beakers or jars, about 250 mL food coloring or dye in a squirt bottle or with a dropping pipe 1. What is the meaning of the term micro? 2. What is the meaning of the term macro? 3. In terms of observation, what is the difference between micro and macro? 4. Although air is treated as a uniform gas, its major component is _____________. 5. Why doesn't a gas have a fixed shape or size? 6. Which theory is used to describe the behavior of gases? 7. What does the theory above assume about the size of gas molecules? 8. What does the theory assume about the motion of gas molecules? 9. A gas is an example of a fluid. What other state of matter is an example of a fluid? 10. Obtain two beakers and fill them with water. Carefully add a dropper of dye or food coloring to the top of the water. Describe the process you observe: 11. What is the name of the process you observed? 12. Forcefully squirt a dropper of dye or food color into the second beaker of water, and describe the process you observe. 13. Why did the dye move differently the second time? 14. If you now stir the dye around in a circular motion in the beaker, you should see _________________ motion. 15. What is viscosity? 16. What is a boundary layer? 17. Which scientist introduced the concept of boundary layer? 18. This discovery is the greatest discovery in the field of ___________________ 19. Air viscosity and boundary layer are important in flight because they affect which two forces involved in flight? 20. At high speeds, the air is compressed during flight. What happens to the density of the air? __________________________________ Click on Animated Gas Lab, fix the temperature, and then fix the mass to see what effect increasing the pressure has on density. (Density is mass per unit of volume.

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