Physical Science

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Review for Semester 1 Physical Science

_____ 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...
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