1. Which of the following relationships is valid?

A. 273 K = 0C = 32F

B. 0F is warmer than 273 K C. 32F is the same as 0C but colder than 273 K

2. Why is it important that experiments be done over and over again?

A. Repetition makes it more likely that the results of an experiment will be supported by other scientists.

B. Repetition allows new controls to be used. C. Repetition makes the experiment more biased.

3. If, according to Newton's third Law which states that for every action force, there is an equal but opposite reaction force, why do objects ever move if the opposite forces are equal?

A. The forces may be equal but they are acting on different objects. B. This law is valid, but only in theory; there are always slight differences.

C. Friction removes some of the effectiveness of the forces, but unequally.

4. Jane is on a merry-go-round that is moving at a constant speed. Her velocity is NOT constant.

A. True

B. False

5. If a hypothesis turns out to be false, a scientist will most likely

A. build a new model.

B. form a new hypothesis. C. give up on the experiment.

6. The average human body temperature is 37 degrees Fahrenheit.

A. True

B. False

7. Which of the following is TRUE about the relationship between science and technology?

A. Science is the application of technology. B. Technology depends on science, but can lead to more science. C. Science and technology always produce positive results for society.

8. Another term for the steepness of the line in a line graph is its

A. horizontal axis.

B. vertical axis.

C. slope.

9. In an experiment a student measured the increasing acidity of spoiled milk at six hour intervals. If a line graph of the data was prepared, which of the following would best describe the design of the graph?

A. The acidity data is considered the independent variable and plotted on they-axis.

B. The time data is considered the independent variable and plotted on thex-axis.

C. The time data is considered the independent variable and plotted on they-axis.

10. Technology can be defined as the skills or knowledge needed to operate a human-made object

A. True

B. False

11. How many milliseconds are there in a one hour science class?

A. 36,000

B. 3,600,000

C. 6,000,000

12. When you construct a line graph, you should always plot the independent variable along the x-axis.

A. True

B. False

13. Which of the following is TRUE? A. A hypothesis may be true or false.

B. A hypothesis must be a constant. C. A hypothesis is also known as a variable.

14. When a scientist makes observations and sets up an experiment, he or she is typically involved in

A. performing an investigation.

B. building a model. C. making a pilot plant.

15. According to Newton's second law of motion, what is required to cause the greatest increase in the acceleration of a moving object?

A. applying a net force over a longer amount of time B. decreasing the velocity while increasing the amount of time the force is

applied C. applying a net force in a shorter amount of time

16. An explanation of things or events before observations and investigations are performed is called scientific theory.

A. True B. False

17. A change in motion occurs when A. balanced forces cancel each other.

B. unbalanced forces result in a larger net force.

C. the net force has a value of zero.

18. What is the accepted abbreviation for the prefixmicro?

A. m B. C.mi

19. An SI unit that is multiplied by itself or a unit made up of many different types of SI units is called a derived unit.

A. True

B. False

20. Absolute zero is the coldest possible temperature and is equal to 0 degrees Celsius.

A. True

B. False

21. What size container of soft drink would you need to buy to pour 10 glasses that each contain 200 mL?

A. 2 liter bottle

B. .5 liter bottle

C. 1 liter bottle

22. What is the average speed, in meters per second, of a runner who has moved 5,000 meters in 1,200 seconds? Remember the equation:

A. 4.2 m/s

B. 420 m/s

C. 0.42 m/s

23. If you were designing an experiment to determine which brand of battery would last longer, which of the following would be an example of a control in the experiment?

A. the device that was being used to test the batteries

B. the brand of the battery C. the amount of time until the battery stopped working

24. A circle graph depicting the types of coins in a coin collection shows that all the quarters were represented by 90 degrees. If the entire collection consists of 200 coins, how many are quarters?

A. 90

B. 180

C. 50

25. If a ball was rolling down a hill at a rate of 5 m/s, but then encountered a steeper hill where, in 2 s, its rate changed to 9 m/s, what would be the average acceleration?

A.2 m/s2

B.4 m/s2

C.5 m/s2

26. Which of the following would be considered "stating the problem" when investigating a potential new medicine?

A. determining if the raw materials are available to produce the medication developed

B. describing a health situation that needs to be remedied

C. testing the new medication for effects

27. The gravitational constant on Mars is 3.7 m/s2. If a person's mass on Earth is 50.0 kg, what would their weight, in N, be on Mars? (F = mg)

A. 185 N

B. 50.0 N

C. 13 N

28. When an object is moving which of the following best describes the sliding friction force on the object?

A. Sliding friction is the opposite of static friction. B. Sliding friction acts in the opposite direction of the motion of the object on

a surface. C. Sliding friction is the force felt in the same direction as a sliding object.

29. Using the data in following table, the momentum of object A is

A. greater than that of object B.

B. less than that of object B. C. the same as that of object B.

30. One kilogram would contain how many grams?

A. 100

B. 1,000 C. 1,000,000

31. How do scientific theories differ from scientific laws?

A. Scientific theories and laws do not differ; they are the same.

B. A scientific theory is concerned with why something happens, but scientific

laws deal with what, under certain conditions, will happen in nature.

C. Scientific theories come from a conclusion based on hypothesis testing. Scientific laws are true all the time and come from models.

32. A scientist can minimize bias in a scientific experiment by

A. running only one trial of each experiment.

B. keeping records on every trial during the experiment.

C. relying on personal expectations for results.

33. In a scientific experiment the control is A. a variable that can change during the experiment.

B. that portion of an experiment that you are not performing experiments on.

C. often considered the conclusion in a scientific experiment

34. Acceleration toward the center of a curved path is

A. gravitational.

B. centripetal.

C. inertial.

35. The following lists shows three measurements. Which list shows the measurements in order from largest to smallest?

A. 1 cm; 1 mm; 1 km

B. 1 km; 1 cm; 1 mm

C. 1 mm; 1 cm; 1 km

36. If a piece of metal has a mass of 20.0 grams and a volume of 0.518 cm3, what is the density of the gold?

A.38.6 g/cm3

B.5.18 g/cm3

C.0.0518 g/cm3

37. If a bicycle and motorcycle are traveling at the same speed, why is it easier to stop the bicycle?

A. The bicycle has less inertia.

B. The bicycle has more friction.

C. The bicycle less friction.

38. What would a dropped ball's average acceleration be if it reaches a velocity of 35.5 m/s after 5.0s? Remember the equation:

A.177 m/s2

B.0.14 m/s2

C.7.1 m/s2

39. An organized set of steps or procedures involving testing a hypothesis used in an investigation is called

A. the hypothesis testing method.

B. the scientific method. C. an experiment.

40. To measure the intensity of light, which SI unit would you use?

A. candela

B. mole C. brightness

41. You perform an experiment to test how much ink is in five different brands of ink pens that each cost one dollar. You press the pens on paper to make continuous marks until the ink runs out in each one. Which of the following would be a dependent variable in your experiment?

A. the cost of the pens B. the brand of the pens C. the amount of ink in the pens

42. Which of the following is NOT considered biotechnology?

A. using fermentation to obtain cheese.

B. developing new methods for refining petroleum. C. genetically engineering food crops to produce higher yields.

43. The SI base unit of length is a gram.

A. True B. False

44. Which of the following is TRUE of acceleration?

A. it is the same as speed.

B. it is the rate of change of velocity. C. it is always a motion in two dimensions

45. When a ball is dropped, it falls due to the force of friction.

A. True B. False

46. What is the momentum of a person on a skateboard with a total mass of 55 kg moving at a velocity of 8 m/s? (p = mv)

A. 6.9 kg m/s B. 440 kg m/s C. According to Newton's third law, the momentum = zero.

47. The correct formula to use to determine how much water a bowl will hold isv = lwh.

A. True B. False

48. Scientists often report scientific data in a graph form instead of a table style. This is done because

A. graphs allow easier detection of patterns in the data.

B. graphs show the data more accurately than tables.

C. it is easier to put graphs in scientific reports.

49. Which of the following is NOT an example of technology?

A. sunlight

B. microwave oven

C. ink pen

50. Which of the following describes Newton's first law?

A. An object at rest will move when a balanced force acts on it.

B. A moving object will object will move at a constant velocity unless an

unbalanced force acts on it.

C. An objects acceleration is in the same direction as the net force acting on

it.