Week 5-Day 1

1. Week 5-Day 1

2. OBJ 1 What is the most useful tool in identifying the wavelengths of visible light?

3. OBJ 1 What is the most useful tool in identifying the wavelengths of visible light? Spectroscope

4. Obj 1 What is the most appropriate unit of measure for reporting the density of a solid? F) g/cm 3 G) g/cm H) g/L 2 J) g/mm 2

5. Obj 1 Which of these is the most appropriate unit of measure for reporting the density of a solid? g/cm 3

6. OBJ 1 Which of the following is most useful in determining the kinetic energy of a 50 g battery-powered car traveling a distance of 10 m? A Beaker B Voltmeter C Thermometer D Stopwatch

7. OBJ 1 Which of the following is most useful in determining the kinetic energy of a 50 g battery-powered car traveling a distance of 10 m? Stopwatch

8. OBJ 1 Which variable do you change in the experiment?

9. OBJ 1 Which variable do you change in the experiment? THINK ……..I CHANGE

10. OBJ 1 The independent variables can be found on which axis?

11. OBJ 1 The independent variables can be found on which axis?

12. OBJ 1 These data show how the mass of an undisturbed beaker of alcohol varied during a class period. What happened?

13. OBJ 2 A deletion of a DNA base from a gene affects an organism by — F) causing future gametes to have additional chromosomes G) changing the sequence of amino acids in a protein H) causing chromosome fragments to form long chains J) changing the structure of ribose sugar in nucleic acids

14. OBJ 2 A deletion of a DNA base from a gene affects an organism by — F) causing future gametes to have additional chromosomes G) changing the sequence of amino acids in a protein H) causing chromosome fragments to form long chains J) changing the structure of ribose sugar in nucleic acids

15. Obj 2 Because chewing begins the breakdown of food before it is swallowed, digestion starts in the mouth and throat. Which of the following systems aids most in this early stage of digestion? A Immune system B Excretory system C Muscular system D Respiratory system

16. Obj 2 Because chewing begins the breakdown of food before it is swallowed, digestion starts in the mouth and throat. Which of the following systems aids most in this early stage of digestion? A Immune system B Excretory system C Muscular system D Respiratory system

17. Obj 2 Which of the following must occur before DNA replication can take place? A Translation of DNA into amino acids B Separation of the DNA molecule into codons C Transformation of DNA into RNA D Separation of the DNA double helix

18. Obj 2 Which of the following must occur before DNA replication can take place? Separation of the DNA double helix

19. Obj 2 Saltwater fish remove extra salt from their body by active transport through the gills. What is the result of this activity? A The salt becomes more chemically active. B Water balance is maintained in the blood. C The rate of energy production is decreased. D The cell membrane becomes less permeable to water.

20. Obj 2 Saltwater fish remove extra salt from their body by active transport through the gills. What is the result of this activity? A The salt becomes more chemically active. B Water balance is maintained in the blood. C The rate of energy production is decreased. D The cell membrane becomes less permeable to water.

21. OBJ 3 Some mesquite trees have deeper roots than any other plant in the desert. How are deep roots an adaptation for survival in the desert?

22. OBJ 3 Some mesquite trees have deeper roots than any other plant in the desert. How are deep roots an adaptation for survival in the desert? Roots can extend great distances to reach water.

23. OBJ 3 Some species of kelp anchor themselves to the seafloor. These species have small air sacs, called air bladders, at the base of each leaf. The air bladders raise the top of the kelp to the water’s surface. What advantage do air bladders give the kelp?

24. OBJ 3 Some species of kelp anchor themselves to the seafloor. These species have small air sacs, called air bladders, at the base of each leaf. The air bladders raise the top of the kelp to the water’s surface. What advantage do air bladders give the kelp? They allow kelp leaves to receive greater amounts of sunlight.

25. Obj 3 A study shows that 40% to 100% of raw poultry is contaminated by disease-causing bacteria. What is an activity that provides people the best protection from these bacteria? F Rinsing dishes thoroughly G Eating a balanced diet daily H Visiting a doctor regularly J Cooking foods properly

26. Obj 3 A study shows that 40% to 100% of raw poultry is contaminated by disease-causing bacteria. Which of the following activities provides people the best protection from these bacteria? F Rinsing dishes thoroughly G Eating a balanced diet daily H Visiting a doctor regularly J Cooking foods properly

27. OBJ 3 Which conclusion is best supported by the information in the diagram? F Volcanic eruptions were common in the area. G The area was once a marine environment. H Organisms in the area reproduced frequently. J Consumers once outnumbered producers in the area

28. Obj 3 Insecticides help humans compete with insects for a resource. Which resource is most likely to be preserved for humans through the use of insecticides? F Sunlight G Water H Food J Air

29. Obj 3 Insecticides help humans compete with insects for a resource. Which resource is most likely to be preserved for humans through the use of insecticides? Food

30. OBJ 3 A man treated his home with a pesticide that kills roaches. The first application of the pesticide killed 92% of the roaches. Two months later he applied the pesticide to his home again, but the second application killed only 65% of the roaches. What would best explain the decrease in the effectiveness of the pesticide?

31. OBJ 3 A man treated his home with a pesticide that kills roaches. The first application of the pesticide killed 92% of the roaches. Two months later he applied the pesticide to his home again, but the second application killed only 65% of the roaches. What would best explain the decrease in the effectiveness of the • pesticide? The surviving roaches were naturally resistant to the pesticide, and that resistance was inherited by their offspring.

32. Obj 4 The buoyant force that a fluid exerts on objects is increased when there is an increase in the fluid’s — F acidity G clarity H solubility J density

33. Obj 4 The buoyant force that a fluid exerts on objects is increased when there is an increase in the fluid’s — F acidity G clarity H solubility J density

34. OBJ 4 What would support the idea that mass is conserved in a reaction that produces a gas as a product?

35. OBJ 4 What would support the idea that mass is conserved in a reaction that produces a gas as a product? Trapping the gas and measuring its mass

36. OBJ 4 • Elements found in which shaded area of this periodic table undergo the fewest chemical reactions?

37. OBJ 4 • Elements found in which shaded area of this periodic table undergo the fewest chemical reactions? T (NOBLE GASES DON’T REACT)

38. OBJ 4 As the viscosity of a liquid increases, the liquid — F conducts electricity G pour more slowly H evaporates more quickly J forms a precipitate

39. OBJ 4 As the viscosity of a liquid increases, the liquid — F conducts electricity G pours more slowly H evaporates more quickly J forms a precipitate

40. OBJ 4 Silver bromide is a type of halide. Elements from which group in the periodic table are necessary to form halide compounds? A Group 4 B Group 5 C Group 10 D Group 17

41. OBJ 4 Silver bromide is a type of halide. Elements from which group in the periodic table are necessary to form halide compounds? Group 17

42. OBJ 4 In photography, which of these is an example of a chemical change? F) Light being refracted by a camera lens G) Adjusting a lens to focus light H) Halide granules being activated by light J) Allowing a certain wavelength of light into the camera

43. OBJ 4 In photography, which of these is an example of a chemical change? F) Light being refracted by a camera lens G) Adjusting a lens to focus light H) Halide granules being activated by light J) Allowing a certain wavelength of light into the camera

44. OBJ 4 Water normally boils at 100°C at sea level and at 97°C on a North American mountaintop. This difference in boiling points can be explained by the difference between the locations’— air pressure

45. OBJ 5 A hockey player pushed a puck toward the opposite side of a level ice rink. The player expected the puck to continue all the way across the ice, but the puck slowed and stopped before reaching the other side. Why does the puck fail to slide all the way to the opposite side?

46. OBJ 5 A hockey player pushed a puck toward the opposite side of a level ice rink. The player expected the puck to continue all the way across the ice, but the puck slowed and stopped before reaching the other side. Why does the puck fail to slide all the way to the opposite side? An opposing force acted on the puck….gravity…friction

47. OBJ 5 Which of these devices uses the sun’s energy directly? A Windmill B Hydroelectric dam C Nuclear power plant D Photovoltaic cell

48. OBJ 5 Which of these devices uses the sun’s energy directly? A Windmill B Hydroelectric dam C Nuclear power plant D Photovoltaic cell

49. Obj 5 A 1-kilogram ball has a kinetic energy of 50 joules. The velocity of the ball is — F) 5 m/s G) 10 m/s H) 25 m/s J) 50 m/s

50. Obj 5 A 1-kilogram ball has a kinetic energy of 50 joules. The velocity of the ball is — F) 5 m/s G) 10 m/s H) 25 m/s J) 50 m/s