physical science final

2. An object travels 8 meters in the first second, 8 meters in the second, and 8 meters in the third second. The acceleration is _____.

0

25. Which temperature scale labels the freezing point of water at 0 degrees?

Celsius

4. Consider drops of water leaking from a water faucet. As the drops fall they

Get father apart

62. Salad dressing is a _____________ mixture.

Heterogeneous mixture

26. Styrofoam plastic is a good heat _____.

Insulator

49. Does a compound like water have the same properties as oxygen and hydrogen?

No

28. Heat travels from the sun to the earth by _____.

Radiation

20. The unit of power is the _____.

Watt

43. In order for current to exist in a circuit, you must have _____.

a complete path

56. What is matter?

anything that occupies space & has mass

33. The distance between successive identical parts of a wave is called its _____.

wavelength

19. Power is defined as the _____.

work done on an object divided by the time it takes to do the work

5. A ball is thrown straight up. At the top of its path its acceleration is _____.

10 m/s2

48. The nucleus of a neutral atom contains 26 protons. How many electrons does it have?

26

50. How many elements are in H12O22C11?

3

58. How many valence electrons in B (atomic number 5)?

3

51. How many atoms in the above formula?

45

55. If half-life is 24 hrs, how many hours for ¼ left?

48 hours

67. If alcoholic beverages are 100 proof, how much is pure alcohol?

50% in 100 proof alcohol

9. When a woman stands with two feet on a scale, the scale reads 500 N. When she lifts one foot, the scale reads _____.

500 N

61. What is the difference between compound and mixture?

A pure substance is a material that consists of only one type of element or compound A mixture is a collection of two or more pure substances and can be separated by physical means.

70. List five uses of organic compounds:

All of the above

54. List the radioactive particles and tell which is less harmful.

Alpha Beta Gamma

47. The north pole of a magnet _______ the south pole

Attract

10. Which has more mass, a kilogram of feathers or a kilogram of iron?

Both are 1kg

52. Is gasoline burning in an engine a chemical or physical change?

Chemical

64. A reaction with energy products is ______________.

Exothermic reaction there is a net release of energy

11. Accelerations are produced by _____.

Forces

8. One object has twice as much mass as the other. The first object also has twice as much _____.

Inertia

18. The unit of work is the _____.

Joule

12. Forces always occur in _____.

Pairs

32. The time needed for a wave to make one complete cycle is its _____.

Period

63. With sugar in coffee what is the solute?

Sugar

38. Electromagnetic waves are what type waves?

Transverse

1. Acceleration is defined as the change in

Velocity divided by the time (acceleration)

27. During a very cold winter, water pipes sometimes burst. The reason for this is

Water expands when cooled

66. A molecule of carbon and hydrogen is ______________.

a hydrocarbon (chemical compounds)

3. In the absence of air resistance, objects fall at constant _____.

acceleration 10m/s2

45. Fuses and circuit breakers are used to _____.

all of the above

13. An archer shoots an arrow. Consider the action force to be the bowstring against the arrow. The reaction to the force is the _____.

arrow against bowstring

39. Protons and electrons _____.

attract

40. The SI unit of charge is the _____.

coulomb

60. Sharing of electrons is __________bonding.

covalent bond

42. An ampere is a unit of electrical _____.

current

41. A volt is a unit of _____.

electric potential

24. An object at rest may have _____.

energy

17. In physics, work is defined as _____.

force moved through distance

72. What phase of matter expands most when heated?

gas

71. Heat energy flows from _____ to ______.

hot to cold

16. The reason padded dashboards are used in cars is that they _____.

increases time of impact

15. Which has more momentum, a large truck moving at 30 mph or a small truck moving at 30 mph?

large truck

21. Potential energy is the energy an object has because of its _____.

location

22. An object that has kinetic energy must be _____.

moving

7. The law of inertia applies to _____.

moving & non moving objects

68. Is food radioactive when radiated with gamma rays?

no

65. Living organisms have mostly ________ compounds.

organic compounds

44. Electrical elements in our homes are connected in _____.

parallel circuit

30. Firewalkers who walk barefoot on red-hot coals depend on _____.

poor conductivity of wood

59. What is the charge if an atom loses an electron?

positive

23. A job is done slowly and an identical job is done quickly. Both jobs require the same amount of work but different amounts of _____.

power

73. ____________ and ___________ are charged particles.

protons & electrons

29. The reason light-colored clothes help keep you cool in warm weather is that clothes of light color _____.

reflect a lot of energy

37. Two like charges _____.

repel

6. The astronomer Copernicus was the first person to state that the earth _____.

revolves around the sun

14. An unfortunate bug splatters against the windshield of a moving car. Compared to the force of the car on the bug, the force of the bug on the car is _____.

same

35. Compared to the speed of light, sound travels _____.

slower

36. Sound travels fastest in ___________

solid or ICE

46. Physics is defined as ___________________________.

study of matter & energy & the relationship between them

53. Chemistry is the study of______________________

study of matter & interaction of matter

34. Hertz is a _____.

unit for frequency

57. What is valence shell?

valence shell outer most shell of electron

31. The source of all wave motion is _____.

vibrations