8^th Grade Science 1^st Nine Weeks Test Name:

1. A hypothesis that passes its test becomes a _________________.

2. You find an old radio made in 1922. This object is an example of:

(a) Science (b) Technology

3. A quantitative description will always involve:

(a) A color (b) A number (c) A species (d) None of these

4. Silver is an example of a(n): (a) Element (b) Mixture (c) Compound

5. Water is an example of a(n): (a) Element (b) Mixture (c) Compound

6. The symbol for cobalt is: (a) C (b) Co (c) Ca (d) Cb

7. Which number is always larger? (a) Atomic Number (b) Atomic Mass

8. The charge on an electron is: (a) Positive (b) Negative (c) Neutral

9. Which charged ion appears first in a formula? (a) Positive (b) Negative

Matching:

A. MgCl2 B. H2O	C. H2SO4 D. KNO3	E. H2S F. Fe2O3		G. Al2O3 H. CuCl2	I. NaCl J. NaOH
10. ___ Iron oxide 11. ___ Sodium hydroxide 12. ___ Copper chloride 13. ___ Sulfuric acid 14. ___ Potassium nitrate			15. ___ Sodium chloride 16. ___ Water 17. ___ Magnesium chloride 18. ___ Aluminum oxide 19. ___ Hydrogen sulfide

20. An –ate ending means the last element of the formula is: (a) O (b) Na (c) Cl

21. The name for CO₂ is carbon dioxide. The di- means: (a) 1 (b) 2 (c) 3

22. How many carbon atoms are in CaC₂? ______

23. Ca is a: (a) Metal (b) Metalloid (c) Non-metal

24. KOH is a(n): (a) acid (b) base

25. Pure water has a pH of: (a) 1 (b) 7 (c) 12

26. Acids turn litmus paper: (a) red (b) blue

27. The metric system was developed in the 1790’s in:

(a) United States (b) France (c) China (d) Egypt

28. You would use a triple beam balance to determine: (a) Mass (b) Length (c) Volume

29. You would use a graduated cylinder to determine: (a) Mass (b) Length (c) Volume

Match these metric units to quantities measured:

A. Second

B. Kilogram

C. Meter

D. Liter

30. ___ Length 31. ___ Time

32. ___ Mass 33. ___ Volume

34. What we call weight is the effect of ___ on an object’s mass.

(a) Time (b) Mass (c) Gravity (d) Daylight

35. If the mass of an object is 20 grams and its volume is 5 milliliters, its density is:

(a) 100 g/ml (b) 4 g/ml (c) 0.25 g/ml

36. Three liquids of these densities are mixed, and then separate. Which one is expected to sink to the bottom?

(a) 0.8 g/ml (b) 1.0 g/ml (c) 13 g/ml

37. 2 kilometers = ___________ meters

38. An object sitting on a high shelf has (a) kinetic energy (b) potential energy.

39. If a machine has a handle it is usually a: (a) lever (b) wheel and axel

40. Newton’s first law of motion is also called his Law of: (a) Mass (b) Inertia

41. The more mass an object has the __ it must be pushed to move. (a) more (b) less

42. Nothing in the universe moves faster than: (a) 50 mph (b) speed of light

43. Newton’s second law of motion says that ______ = mass x acceleration.

(a) Mass (b) Force (c) Action

44. Newton’s third law of motion says that for every ___ there is an equal and opposite reaction.

(a) Mass (b) Force (c) Action

45. Galileo discovered a swinging pendulum could be used to measure:

(a) Time (b) Mass (c) Force (d) Action

46. For a car to travel along a road, the road must push back at the car. TRUE or FALSE

47. The machine below is a(n): (a) Lever (b) Wheel and axel (c) Inclined plane

48. Which letter on the wave below marks a crest?

49. Which letter on the wave below marks a trough?

50. The number of crests of a wave passing by every second is called its:

(a) Frequency (b) Wavelength (c) Crest number

Bonus: Describe how YOUR poster compliments our studies this nine weeks: