Test - Matter Test

Question 1

10. Three sawing wood, crushing a can examples of physical changes are
    A. Sawing wood, crushing a can, and burning a marshmallow
    B. Boiling of water, blowing up a balloon, and melting a candle
    C. Burning of gasoline, rotting an egg, and exploding fireworks
    D. Freezing of water, evaporation of gasoline, and rusting of a nail

Answer 1

B. Boiling water, crushing a can, and burning a marshmallow

Test key - page 1

Question 2

16. Increasing the surface area of a solid

A. Increases the speed of dissolving
B. Causes the solid to ionize
C. Has no effect on the speed of dissolving
D. Slows the speed of dissolving

Answer 2

16. A
    A. Increases the speed of dissolving

Test key - page 2

Question 3

19.
A flask containing molecules of gas A and a seperate flask containing molecules of gas B are both at the same temperature. Gases A and B must have equal

A. Volumes B. Masses C. Pressures D. Average kinetic energies

Answer 3

19. D
    D. Average kinetic energies

Test key - page 2

Question 4

27. Using the data table to the right determine the identity of the cube of metal that measures 1.2cm on each side and has a mass of 18.15 grams

A. Gold B. Silver C. Nickel D. Zinc

Answer 4

27. B
    B. Silver

Test key - page w

Question 5

40. Label these as a physical property, physical change, chemical property, and chemical change.
41. Boiling water

Answer 5

40. Physical change

Test key - page 3

Question 6

53. Iron and oxygen react to form rust. What will happen to the mass of the rust compared to the mass of the iron and oxygen before the reaction. Explain why this will happen.

Answer 6

53. The Same because the law of conservation of mass says that matter can not be created or destroyed, even in a chemical change.

Test key - page 4

Question 7

55. List and explain the three factors that increase the solubility rate of substance.

Answer 7

55

• solute size rate because more surface area
• temp rate because more particles collide
• stirring rate because it brings fresh solvent in contact with solute

Test key - page 5

Question 8

60. Explain how salt dissolves in water

Answer 8

60. Attractive force pulls ions away from crystal
    Water surround search ion and continues until all ions are separated

Test key - page 6

Question 9

59. Name one similarity between compounds and homogeneous mixture sand one difference.

Answer 9

59. Similarity = both involve element
    Difference = compound is chemically combined and mixture is physically

Test key - page 5