TAKS Objective 1

1. TAKS Objective 1 The student will demonstrate an understanding of the nature of science.

2. Bio (1) and IPC (1) 1A Review Demonstrate safe practices during field and laboratory investigations

3. 1. If there is a clear chemical on your table during a lab, how should you identify it? • Ask your instructor what it is. • Taste the chemical. • Smell the chemical. • Rub the chemical between your fingers.

4. 1. If there is a clear chemical on your table during a lab, how should you identify it? • Ask your instructor what it is. • Taste the chemical. • Smell the chemical. • Rub the chemical between your fingers.

5. 2. What are the potential dangers if a chemical from a lab spills on your hand? • Your hand could catch fire. • You will risk being infected with bacteria. • You could get a chemical burn. J. You could cut your hand.

6. 2. What are the potential dangers if a chemical from a lab spills on your hand? • Your hand could catch fire. • You will risk being infected with bacteria. • You could get a chemical burn. J. You could cut your hand.

7. 3. You are working with your lab partner, and he burns his hand. How do you apply first aid? • Apply direct pressure • Apply cold water and inform the instructor • Use the safety shower • Apply cold compresses

8. 3. You are working with your lab partner, and he burns his hand. How do you apply first aid? • Apply direct pressure • Apply cold water and inform the instructor • Use the safety shower • Apply cold compresses

9. 4. Which is the correct way to hold a test tube while heating its contents? • Pointing straight up • Pointing horizontally • Pointing away from yourself and others J. Pointing straight at yourself

10. 4. Which is the correct way to hold a test tube while heating its contents? • Pointing straight up • Pointing horizontally • Pointing away from yourself and others J. Pointing straight at yourself

11. 5. Why is it important to NOT run if your hair or clothing catches fire in a science lab? • It will cause others to run. • Running will put out the fire. • Running will feed oxygen to the fire. • The fire will burn out on its own.

12. 5. Why is it important to NOT run if your hair or clothing catches fire in a science lab? • It will cause others to run. • Running will put out the fire. • Running will feed oxygen to the fire. • The fire will burn out on its own.

13. 6. You are performing a lab that involves a mouse. In your lab, you see the safety symbol of a mouse, indicating a biological specimen will be used. Who does this precaution protect? • You and the mouse • You only • The mouse only J. Your instructor

14. 6. You are performing a lab that involves a mouse. In your lab, you see the safety symbol of a mouse, indicating a biological specimen will be used. Who does this precaution protect? • You and the mouse • You only • The mouse only J. Your instructor

15. Bio (2) and IPC (2) 2A Review Plan and implement investigative procedures including asking questions, forming testable hypotheses, and selecting equipment and technology

17. 1. Which quantity is measured by the lab equipment shown in the figure? • Length • Mass • Volume • Weight

18. 1. Which quantity is measured by the lab equipment shown in the figure? • Length • Mass • Volume • Weight

19. 2. How much liquid is in the cylinder shown in the figure? • 78 mL • 79 mL • 80 mL J. 81 mL

20. 2. How much liquid is in the cylinder shown in the figure? • 78 mL • 79 mL • 80 mL J. 81 mL

22. 3. Some of the data in the table were measured during the experiment, and some were calculated from the data measurements. Which of the quantities in the table were measured? • Mass of cup, mass of liquid and cup, and density • Mass of cup, mass of liquid and cup, and volume of liquid • Mass of liquid only and density • Mass of liquid only, volume of liquid, and density

23. 3. Some of the data in the table were measured during the experiment, and some were calculated from the data measurements. Which of the quantities in the table were measured? • Mass of cup, mass of liquid and cup, and density • Mass of cup, mass of liquid and cup, and volume of liquid • Mass of liquid only and density • Mass of liquid only, volume of liquid, and density

24. 4. Which of the following is true about the experiment? • The density is the independent variable, the liquid is the dependent variable, and the volume is the constant. • The liquid is the independent variable, the density is the dependent variable, and the volume is constant • The mass of the cup is the independent variable, the density is the dependent variable, and the volume is constant. J. The mass of liquid is the independent variable, the volume of liquid is the dependent variable, and the mass of cup is constant.

25. 4. Which of the following is true about the experiment? • The density is the independent variable, the liquid is the dependent variable, and the volume is the constant. • The liquid is the independent variable, the density is the dependent variable, and the volume is constant • The mass of the cup is the independent variable, the density is the dependent variable, and the volume is constant. J. The mass of liquid is the independent variable, the volume of liquid is the dependent variable, and the mass of cup is constant.

26. 5. Which of the following hypotheses is supported by the data in the table? • Density can be determined from the mass of the cup and liquid and the volume. • Oil will float on tap water, and tap water will float on salt water. • Salt water is less dense than either tap water or oil. • The greater the volume of a liquid, the greater its density.

27. 5. Which of the following hypotheses is supported by the data in the table? • Density can be determined from the mass of the cup and liquid and the volume. • Oil will float on tap water, and tap water will float on salt water. • Salt water is less dense than either tap water or oil. • The greater the volume of a liquid, the greater its density.

28. 6. Other than the cup mentioned in the data table, what laboratory equipment would you need to use to perform this experiment? • Graduated cylinder, balance • Beaker, spring scale • Beaker, balance J. Graduated cylinder, spring scale

29. 6. Other than the cup mentioned in the data table, what laboratory equipment would you need to use to perform this experiment? • Graduated cylinder, balance • Beaker, spring scale • Beaker, balance J. Graduated cylinder, spring scale

30. 7. If the problem you wanted to solve involved determining the composition of a specific star, which of the following would you least likely use to gather information about the problem? • Encyclopedias • Newspapers • Textbooks • The Internet

31. 7. If the problem you wanted to solve involved determining the composition of a specific star, which of the following would you least likely use to gather information about the problem? • Encyclopedias • Newspapers • Textbooks • The Internet

32. 8. If a train could travel on water, it would take an average train about two weeks to travel around Earth. Which of the following is true about this statement? • It is a hypothesis, not a prediction. • It is a prediction, not a hypothesis. • It is both a prediction and a hypothesis. J. It is neither a prediction nor a hypothesis.

33. 8. If a train could travel on water, it would take an average train about two weeks to travel around Earth. Which of the following is true about this statement? • It is a hypothesis, not a prediction. • It is a prediction, not a hypothesis. • It is both a prediction and a hypothesis. J. It is neither a prediction nor a hypothesis.

34. Bio (2) and IPC (2) 2B Review Collect data and make measurements with precision

36. 1. What is the mass of the object being measured in the figure? • 47.52 g • 147.52 g • 407.52 g • 527.40 g

37. 1. What is the mass of the object being measured in the figure? • 47.52 g • 147.52 g • 407.52 g • 527.40 g

39. 2. The surface of liquids in a glass cylinder is always curved. This curved surface is called a meniscus. When reading a volume of a liquid, read the bottom of the meniscus. What is the most precise volume of the liquid shown in the figure? • 19.4 mL • 19.42 mL • 19.57 mL J. 20.58 mL

40. 2. The surface of liquids in a glass cylinder is always curved. This curved surface is called a meniscus. When reading a volume of a liquid, read the bottom of the meniscus. What is the most precise volume of the liquid shown in the figure? • 19.4 mL • 19.42 mL • 19.57 mL J. 20.58 mL

41. 3. A student measured the length of a piece of string that was 64.34 cm long. Her measurements were 67.02 cm, 67.07 cm, 67.05 cm, and 67.04 cm. Which of the following statements is true? • The measurements were accurate but not precise. • The measurements were precise but not accurate. • The measurements were both precise and accurate. • The measurements were neither accurate nor precise.

42. 3. A student measured the length of a piece of string that was 64.34 cm long. Her measurements were 67.02 cm, 67.07 cm, 67.05 cm, and 67.04 cm. Which of the following statements is true? • The measurements were accurate but not precise. • The measurements were precise but not accurate. • The measurements were both precise and accurate. • The measurements were neither accurate nor precise.

43. 4. For the measurements in question 3, which of the following statements is NOT a likely source of error? • The calibrations on the meterstick were read incorrectly. • The end of the string was not placed at the end of the meterstick. • The meterstick itself was not accurately calibrated. J. The string stretched when it was being measured.

44. 4. For the measurements in question 3, which of the following statements is NOT a likely source of error? • The calibrations on the meterstick were read incorrectly. • The end of the string was not placed at the end of the meterstick. • The meterstick itself was not accurately calibrated. J. The string stretched when it was being measured.

46. 5. Room temperature is approximately 20ºC. What is room temperature on the Kelvin scale? • -253 K • 0 K • 68 K • 293 K

47. 5. Room temperature is approximately 20ºC. What is room temperature on the Kelvin scale? • -253 K • 0 K • 68 K • 293 K

48. 6. Human body temperature is approximately 310 K. What is human body temperature in Cº? • 0º C • 20º C • 37º C J. 98.6º C

49. 6. Human body temperature is approximately 310 K. What is human body temperature in Cº? • 0º C • 20º C • 37º C J. 98.6º C

50. 7. Which of the following statements is true? • A Celsius degree is larger than a unit on the Kelvin scale. • A Celsius degree is smaller than a unit on the Kelvin scale. • A Celsius degree is the same size as a unit on the Kelvin scale. • Zero on the Celsius scale is the same as zero on the Kelvin scale.