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Name_________________ Science Prep Course Exam #2 – Matter – Chemical and Physical Properties Section 1: Fill in the blanks. Each question is worth one point. 1. _______________________ Smallest part of an element that has all its properties 2. _______________________ Device that measures atmospheric pressure 3. _______________________ Smallest part of a substance that has all its properties 4. _______________________ Ratio of force to area over which the force acts 5. _______________________ Number of protons in the nucleus of an atom 6. _______________________ Fourth phase of matter 7. _______________________ Found when mass is divided by volume 8. _______________________ Upward force a fluid exerts on a submerged object 9. _______________________ What does “amu” stand for 10. ______________________ Reaction that changes substances into other substances Section 2: Multiple Choice questions. Each question is worth two points. In questions 11 – 15, identify the law, principle, etc. 11. An immersed body is buoyed up by a force equal to the weight of the fluid it displaces. A. Pascal’s Principle B. Archimedes’ Principle C. Boyle’s Law D. Charles’ Law 12. The pressure in a fluid moving steadily decreases when the fluid velocity increases. A. Bernoulli’s Principle B. Avogadro’s Principle C. Archimedes’ Principle D. Pascal’s Principle E. Mr. Houchin’s Principal 13. At a constant pressure, an increase in temperature causes an increase in the volume of a gas and a decrease in temperature causes a decrease in volume of a gas. A. Archimedes’ Principle B. Pascal’s Principle C. Boyle’s Law D. Charles’ Law 14. Equal volumes of all gases at the same temperature and pressure contain the same number of molecules. A. Avogadro’s Principle B. Boyle’s Law C. Pascal’s Principle D. Charles’ Law 15. Pressure applied to a motionless fluid in a container is transmitted undiminished throughout the liquid. A. Bernoulli’s Principle B. Avogadro’s Principle C. Archimedes’ Principle D. Pascal’s Principle Section 3: Fill in the blanks. Each question is worth two points. 16. __________________ motion is the haphazard movement of tiny particles suspended in a gas or liquid. 17. __________________ action causes the rise of a liquid in a fine, hollow tube. This U-shaped rise is called a _____________________. 18. The antiparticle of the proton is the _______________________. The antiparticle of the electron is the ___________________. 19. In ___________________ bonds, electrons are transferred from one atom to another. Bonds in which electrons move all around the substance like a “sea” are called ________________ bonds. 20. Sometimes the surface of a liquid contracts and behaves like an elastic membrane. We call this __________________________________ (2 words). Section B: Bonus questions. Answer the questions for the stated number of points. Show all work (you may receive partial credit). B1. TRUE FALSE When Archimedes discovered his principle, he ran through the streets yelling “Eureka” which is Greek for “I feel a draft.” (4 pts.) B2. A 50 N force stretches a spring 40.5 cm. B2a. If a 25 N force is applied to the same spring, what is the length that the spring is stretched? (4 pts.) B2b. Whose law is used to solve this problem? (2 pts.)