_____ 1. What is a system of knowledge and the methods used to find that knowledge?
_____ 2. How are science and technology related?
_____ 3. In which step of the scientific method is information obtained through the senses? _____ 4. What happens when data in an investigation do not support the original hypothesis?
_____ 5. What do we call the best possible explanation that scientists can come up with for an observation or event.
_____ 6. Why are scientific laws important?
_____ 7. What is the most important safety rule?
_____ 8. How is 0.00069 written in scientific notation?
_____ 9.Timers at a swim meet used four different clocks to time an event. Which recorded time is the most precise? _____ 10. Which of the following conversion factors would you use to change kilometers to meters?
_____1. Which of the following is NOT a pure substance?
_____ 2. A substance that is made up of only one kind of atom is a(n)
_____ 3. Water is a compound because it
_____ 4. Which of the following is a characteristic of a mixture?
_____ 5. A mixture that appears to contain only one substance is a(n)
_____ 6. A mixture can be classified as a solution, suspension or colloid based on the
_____7. Which method can be used to separate parts of a liquid mixture when the entire mixture can pass through filter paper?
_____ 8. Which of the following is a physical change?
_____ 9. During which of the following chemical changes does a precipitate form?
_____ 10. Which of the following is always evidence of a chemical change?
_______ 1. A gas has
_______ 2. Matter that has a definite volume but not definite shape is a
_______ 3. In which of the substances in Figure 3-1 are the forces of attraction among the particles so weak that they can be ignored under ordinary conditions?
_______ 4. What is the result of a force distributed over an area?
_______ 5. Which of the following factors affect the pressure of an enclosed gas?
_______ 6. The temperature and volume in a closed container of gas remain constant. If the number of particles of gas is increased, the gas pressure will
_______ 7. The law that states that the volume of a gas is directly proportional to its temperature in kelvins if the pressure and the number of particles is constant is
_______ 8. If the volume of a cylinder is reduced from 4.0 liters to 2.0 liters, the pressure of the gas in the cylinder will change from 100 kilopascals to
_______ 9. What type of change occurs when water changes from a solid to a liquid?
_______ 10. During a phase change the temperature of a substance
_______ 11. During what phase change does the arrangements of the water molecules become more orderly?
_______ 12. The phase change in which a substance changes from a liquid to a gas is
_______ 13. The phase change in which a substance changes form a solid to a liquid is
_______ 14. Which of the following phase changes is endothermic?
_______ 15. During an exothermic phase change,
Multiple Choice: Write the CAPITAL LETTER that best answers the question or completes the statement.
__________ 1. Which of the following groups contain elements with stable electron configurations?
__________ 2. Ionization energies tend to
__________ 3. The formation of ionic bonds involves the
__________ 4. Which of the following statements correctly describes the substance with the formula KI?
___________ 5. Which statement best describes the properties of sodium chloride?
__________ 6. When two atoms of the same nonmetal react they often form
__________ 7. A triple bond forms when atoms
__________ 8. In a polar covalent bond
__________ 9. Because water molecules are polar and carbon dioxide molecules are nonpolar...