6th Grade - Chapter 15 ONLINE REVIEW

6th Grade - Chapter 15 ONLINE REVIEW

Modified True/False
Indicate whether the statement is true or false. If false, change the identified word or phrase to make the statement true.

____ 1. Copper is used for wires because it is ductile. This is a chemical property. _________________________

____ 2. Matter is made up of motionless particles. _________________________

____ 3. Shape is a chemical property. _________________________

____ 4. Malleability is a physical property. _________________________

____ 5. Chemical properties can't be observed without changing the substance. _________________________

____ 6. The density of a kilogram of iron is less than the density of 1 gram of iron. _________________________

____ 7. Iron filings can be separated from sand by using a filter. _________________________

____ 8. The ability to react with oxygen is a physical property. _________________________

____ 9. Change of state is a physical change. _________________________

____ 10. In a physical change, the substance does not change its identity. _________________________

____ 11. Carbon dioxide goes from a solid to a gas without becoming a liquid. This is a chemical change. _________________________

____ 12. When a substance undergoes a chemical change, its identity does not change. _________________________

____ 13. Mass is conserved in both physical and chemical changes. _________________________

____ 14. When substances react, their mass remains the same after the reaction. _________________________

____ 15. You cannot classify matter based on chemical properties. _________________________

Multiple Choice
Identify the choice that best completes the statement or answers the question.

____ 16. ____ is a physical property.
a.
Oxidation
c.
Flammability
b.
Density
d.
Combustibility


____ 17. Mass is a(n) ____ property.
a.
natural
c.
electrical
b.
chemical
d.
physical


____ 18. The temperature at which a liquid becomes a gas is the ____ point.
a.
freezing
c.
condensation
b.
boiling
d.
melting


____ 19. Density depends on ____.
a.
weight
c.
mass and volume
b.
mass
d.
volume


____ 20. The melting point of silver is a ____.
a.
chemical change
c.
physical property
b.
chemical property
d.
physical change


____ 21. You can separate sugar from sand because sugar is ____ and sand is not.
a.
malleable
c.
soluble in water
b.
ductile
d.
acidic


____ 22. One approach to identifying something unknown is to use a ____.
a.
dichotomous key
c.
liquid layer
b.
lightstick
d.
control


____ 23. A bonfire is an example of the property of ____.
a.
malleability
c.
solubility
b.
combustibility
d.
shape


____ 24. An example of a chemical property is ____.
a.
ability to be attracted by a magnet
c.
boiling point
b.
solubility
d.
ability to react with oxygen


____ 25. Titanium reacts less with oxygen than most metals do. This is a ____.
a.
chemical property
c.
chemical change
b.
physical change
d.
physical property


____ 26. Matter may be found in the plasma state in ____.
a.
blood
c.
rivers
b.
livers
d.
lightning


____ 27. The change that is NOT a physical change is ____.
a.
freezing
c.
burning
b.
dissolving
d.
evaporating


____ 28. When a peeled banana turns black, it is a ____.
a.
chemical change
c.
change of state
b.
physical change
d.
thermal change


____ 29. An example of a chemical change is ____.
a.
a magnet sticking to the refrigerator
c.
mashing potatoes
b.
dew disappearing from the grass
d.
frying a hamburger


____ 30. The mass of the products of a chemical reaction ____ the mass of the reactants.
a.
is greater than
c.
is the same as
b.
is less than
d.
may be more or less than


____ 31. Sandra and some friends are camping out. As they cook marshmallows over a campfire, they watch the logs slowly turn to ash. What process are they observing?
a.
chemical change
b.
chemical property
c.
physical change
d.
physical property


____ 32. Of the four states of matter, which is common in the universe but less common on Earth?
a.
gas
b.
liquid
c.
plasma
d.
solid


____ 33. Meredith is vacationing with her family. They travel to an outdoor exhibit where people re-enact what life was like before the American Revolution. She watches as a blacksmith hammers on hot metal to make horseshoes. What is she watching?
a.
the chemical property of ductility
b.
the chemical property of malleability
c.
the physical property of ductility
d.
the physical property of malleability


____ 34. Mario picks up two balls of equal density.
Why is the mass of ball B greater than that of ball A?
a.
Ball A has greater length.
b.
Ball A has greater volume.
c.
Ball B has greater volume.
d.
Ball B has a higher melting point.


____ 35. Rhonda has prepared a list of characteristics of matter: ability to react with oxygen, boiling point, flammability, mass, and melting point. Which are physical properties?
a.
boiling point, flammability, mass
b.
flammability, melting point, ability to react with oxygen
c.
mass, boiling point, melting point
d.
melting point, boiling point, flammability


____ 36. Vanessa draws a picture of molecules for the class bulletin board.
In what state of matter do you think these molecules would be found?
a.
gas
b.
liquid
c.
plasma
d.
solid


____ 37. Which most likely explains why fireflies can produce light?
a.
a chemical reaction in the air around them
b.
a chemical reaction within their bodies
c.
a physical change within their bodies
d.
a physical change in the air around them


____ 38. Why might a bridge designer MOST want to avoid metals that react strongly with oxygen?
a.
The chemical change might weaken the metal.
b.
Rust can be difficult to paint over.
c.
Metals that react with oxygen are very expensive.
d.
Physical properties of most metals are difficult to determine.


____ 39. Brant holds a ball with a volume of 175 cm3 and a mass of 38.5 g. What is density of the ball?
a.
0.022 g/cm3
b.
0.22 g/cm3
c.
2.2 g/cm3
d.
22 g/cm3


____ 40. If a liquid turns to a gas at –5ºC, how does its boiling point compare to the boiling point of water?
a.
5º higher
b.
100º higher
c.
5º lower
d.
105º lower


____ 41. Which is the change of a solid to a gas without becoming a liquid?
a.
boiling
b.
ductility
c.
sublimation
d.
transparency


____ 42. The ability to reverse a change in matter indicates that it was what kind of change?
a.
atomic
b.
chemical
c.
metallic
d.
physical


____ 43. Gwen peers through a piece of translucent glass. What can she see?
a.
she can see clearly through the glass
b.
she can see some light through the glass
c.
she can see nothing through the glass
d.
she can see only her reflection


Completion
Complete each statement.

44. Scratching a silver teaspoon is a ____________________ change.

45. The temperature at which water boils is ____________________.

46. The mass of an apple would be measured in ____________________.

47. The ____________________ of water at room temperature is 1 g/cm3.

48. Classifying according to ____________________ properties can be difficult because a substance must be changed to observe these properties.

49. Sorting and separating are ways to classify matter using ____________________ properties.

50. A substance's ____________________ properties predict how it will react with other substances.

51. Pieces of colored construction paper fade when left in the sunlight because the dye has the ability to react with ____________________.

52. A change in color is evidence of a ____________________ change.

53. Color is a ____________________ property.

54. A cake baking is an example of a ____________________ change.

55. Flammability is a(n) ____________________ property.

56. The four states of matter are solid, ____________________, gas, and ____________________.

57. Where a sugar and water solution is evaporated, the sugar left behind has less mass than the original solution. The missing mass is found in ____________________.

58. The melting point of ice is a ____________________ property.

59. Density is a ____________________ property.

60. ____________________ changes produce new substances.

61. The total ____________________ of original and new substances is the same after a chemical change.

62. Stainless steel’s ability to resist rust is a ____________________ property.

63. The unit for measuring density is ____________________.

64. The ____________________ point of water is 100°C.

65. Natural gas for cooking has the property of ____________________.

66. The particles of a gas have ____________________ between them.

67. Ductility is a ____________________ property of copper.

68. An ice cube changes to a liquid at the ____________________ of water.

69. A state of matter that occurs at very high temperatures is ____________________.

70. When a match burns, the wood shows the property of ____________________.

71. The reacting substances of a chemical reaction and the products both have a mass of 25 grams. This is an example of the law of ____________________.

72. When a sculptor uses a chisel on a rock, the rock undergoes a ____________________.

Classify the following changes as physical or chemical.

73. Dew on a windshield changes to frost. ____________________

74. A pencil becomes shorter after sharpening. ____________________

75. Magnesium metal burns and becomes a white powder. ____________________

76. A pine log is cut into boards. ____________________

77. Apple cider becomes vinegar. ____________________

78. A balloon expands as it becomes warmer. ____________________

79. A soda bubbles and foams when you open it. ____________________

80. Milk sours. ____________________

81. A substance changes color. ____________________

82. Developing a photograph. ____________________

83. Butter hardens after being in the refrigerator. ____________________

Essay

84.
Explain how you could find the volume of an irregularly shaped piece of aluminum.

85.
How does the energy of the particles differ in solids, liquids, and gases?

86.
How can you separate a mixture of sand and bits of plastic foam?

87.
What physical property do water, plastic wrap, diamonds, and air have in common?

88.
What chemical property does sliced fruit have? How do you know it has this property?

89.
You need to paint iron lawn furniture that has been left outside. What property of iron makes this necessary? If the paint is chipped, what happens?

90.
Is whipping cream a chemical or a physical change? Why?

91.
A dish of sugar and water solution is left in the Sun. After a few days, the solution has disappeared and a white residue remains on the dish. Has a physical or chemical change taken place? Explain.

92.
If you could choose, would you want to use chemical or physical changes to separate two substances? Why?

93.
An antacid is placed in a clear solution. Bubbles form and the antacid disappears. The mass of the final solution is less than the mass of the first solution and the metal. Is this an exception to the law of conservation of mass? Explain.

94.
How could you prove that the law of conservation of mass is obeyed when mixing two solutions?

95.
Explain how the law of conservation of mass applies in a chemical change.

96. Describe the physical properties of a tire and a donut.

97. Why are physical changes preferable to chemical changes for separating two substances?

98. What is the relationship between chemical properties and chemical changes?

99. How would you find the volume of a stone by using water displacement?

100. You have two clear solutions. You put a drop of a red liquid in each solution. The first solution turns red. The second solution turns yellow. What do you know about the solutions?

Matching

Match each item with the correct description below.
a.
length
i.
mass
b.
solid
j.
matter
c.
boiling point
k.
melting point
d.
chemical change
l.
dichotomous key
e.
chemical property
m.
physical change
f.
conservation of mass
n.
physical property
g.
density
o.
state of matter
h.
malleability
p.
volume


____ 101. change in the identity of a substance

____ 102. a substance with this physical property can be rolled into a sheet

____ 103. process that does not change the identity of a substance

____ 104. the distance between two points

____ 105. temperature at which a solid becomes a liquid

____ 106. mass can’t be created or destroyed

____ 107. characteristic that determines how a substance will react

____ 108. state of matter with particles vibrating in a fixed position

____ 109. solid, liquid, gas, or plasma

____ 110. uses physical properties to classify

____ 111. characteristic that can be observed and measured

____ 112. mass per unit volume

____ 113. anything that has mass and takes up space

____ 114. temperature at which a substance changes from a liquid to a gas

____ 115. amount of space an object takes up

____ 116. amount of material an object has in it

Match the appropriate unit of measure with the objects below.
a.
gram
d.
meter
b.
centimeter
e.
cm3
c.
g/cm3



____ 117. length of a soccer field

____ 118. volume of a bottle of soda

____ 119. mass of a hamburger

____ 120. length of your shoe

____ 121. density of gold

Short Answer

122.
Paul’s teacher conducts an experiment to demonstrate a chemical change. She places two substances into a sealed container. The substances react and undergo a chemical change. They look much different after the reaction. This leads Paul to wonder whether the masses of these substances have changed. Have they? Explain your answer.

123.
Julia is in the school lab looking a container of liquid. The liquid appears to have separated into three layers. What can Julia assume about the middle layer of liquid?

124. What physical property could you use to separate sand and sugar? How would you do it?

125. Use the law of conservation of mass to explain why a rusty nail weighs more than the original nail.

126. Study the drawing below and answer the questions below.


a. Which sample is a solid?
b. Which sample is a liquid?
c. In which sample(s) do the particles touch?
d. In which sample(s) do the particles move?

127. What properties would you use to describe an apple? What kind of properties are these?

128. Explain how the disappearance of gasoline from a lawn mower’s tank demonstrates the law of conservation of mass.

129. Read the following description of silver. List each of the underlined properties as either chemical or physical.

A white metal, malleable and ductile. Density is 10.5 g/cm3. Melting point is about 960°C; boiling point is about 2000°C. Does not react with water; does not react with oxygen in the air. Does not react with most acids; reacts with nitric acid.

a. Physical:
b. Chemical:

130. Explain how you can use physical properties to separate iron filings from sawdust.
6th Grade - Chapter 15 ONLINE REVIEW
Answer Section

MODIFIED TRUE/FALSE

1. ANS: F, physical

PTS: 1 DIF: Webb's I OBJ: 1/1 STA: SC.A.1.3.1 SC.A.1.3.5

2. ANS: F, moving

PTS: 1 DIF: Webb's I OBJ: 2/1 STA: SC.A.1.3.1 SC.A.1.3.4

3. ANS: F, physical

PTS: 1 DIF: Webb's I OBJ: 1/1 STA: SC.A.1.3.1

4. ANS: T PTS: 1 DIF: Webb's I
OBJ: 1/1 STA: SC.A.1.3.1

5. ANS: T PTS: 1 DIF: Webb's I
OBJ: 7/2 STA: SC.A.1.3.1 SC.A.1.3.5

6. ANS: F, the same as

PTS: 1 DIF: Webb's I OBJ: 1/1 STA: SC.A.1.3.1

7. ANS: F, magnet

PTS: 1 DIF: Webb's I OBJ: 3/1 STA: SC.A.1.3.1

8. ANS: F, chemical

PTS: 1 DIF: Webb's I OBJ: 7/2 STA: SC.A.1.3.1 SC.A.1.3.5

9. ANS: T PTS: 1 DIF: Webb's I
OBJ: 2/1 STA: SC.A.1.3.5

10. ANS: T PTS: 1 DIF: Webb's I
OBJ: 1/1 STA: SC.A.1.3.5

11. ANS: F, physical

PTS: 1 DIF: Webb's I OBJ: 2/1 STA: SC.A.1.3.5

12. ANS: F, does

PTS: 1 DIF: Webb's I OBJ: 8/2 STA: SC.A.1.3.5

13. ANS: T PTS: 1 DIF: Webb's I
OBJ: 7/2 STA: SC.A.1.3.5

14. ANS: T PTS: 1 DIF: Webb's I
OBJ: 7/2 STA: SC.A.1.3.5

15. ANS: F, can

PTS: 1 DIF: Webb's I OBJ: 9/2 STA: SC.A.1.3.1

MULTIPLE CHOICE

16. ANS: B PTS: 1 DIF: Webb's I OBJ: 1/1
STA: SC.A.1.3.1 SC.A.1.3.5

17. ANS: D PTS: 1 DIF: Webb's I OBJ: 1/1
STA: SC.A.1.3.1

18. ANS: B PTS: 1 DIF: Webb's I OBJ: 2/1
STA: SC.A.1.3.1

19. ANS: C PTS: 1 DIF: Webb's I OBJ: 1/1

20. ANS: C PTS: 1 DIF: Webb's I OBJ: 1/1
STA: SC.A.1.3.1 SC.A.1.3.5

21. ANS: C PTS: 1 DIF: Webb's I OBJ: 3/1
STA: SC.A.1.3.1

22. ANS: A PTS: 1 DIF: Webb's I OBJ: 3/1

23. ANS: B PTS: 1 DIF: Webb's I OBJ: 7/2
STA: SC.A.1.3.1

24. ANS: D PTS: 1 DIF: Webb's I OBJ: 7/2
STA: SC.A.1.3.5

25. ANS: A PTS: 1 DIF: Webb's I OBJ: 8/2
STA: SC.A.1.3.1 SC.A.1.3.5

26. ANS: D PTS: 1 DIF: Webb's I OBJ: 2/1
STA: SC.A.1.3.1

27. ANS: C PTS: 1 DIF: Webb's II OBJ: 8/2
STA: SC.A.1.3.5

28. ANS: A PTS: 1 DIF: Webb's I OBJ: 8/2
STA: SC.A.1.3.5

29. ANS: D PTS: 1 DIF: Webb's I OBJ: 8/2
STA: SC.A.1.3.5

30. ANS: C PTS: 1 DIF: Webb's I OBJ: 7/2
STA: SC.A.1.3.5

31. ANS: A PTS: 1 DIF: Webb's I STA: SC.A.1.3.5

32. ANS: C PTS: 1 DIF: Webb's I STA: SC.A.1.3.1

33. ANS: D PTS: 1 DIF: Webb's II STA: SC.A.1.3.5

34. ANS: C PTS: 1 DIF: Webb's II STA: SC.A.1.3.2 SC.A.1.3.6

35. ANS: C PTS: 1 DIF: Webb's II STA: SC.A.1.3.5

36. ANS: A PTS: 1 DIF: Webb's II STA: SC.A.1.3.1

37. ANS: B PTS: 1 DIF: Webb's II STA: SC.A.1.3.5

38. ANS: A PTS: 1 DIF: Webb's III STA: SC.A.1.3.5

39. ANS: B PTS: 1 DIF: Webb's II STA: SC.A.1.3.1

40. ANS: D PTS: 1 DIF: Webb's II STA: SC.A.1.3.4

41. ANS: C PTS: 1 DIF: Webb's I STA: SC.A.1.3.5

42. ANS: D PTS: 1 DIF: Webb's I STA: SC.A.1.3.5

43. ANS: B PTS: 1 DIF: Webb's I STA: SC.A.1.3.1

COMPLETION

44. ANS: physical

PTS: 1 DIF: Webb's I OBJ: 1/1 STA: SC.A.1.3.5

45. ANS: 100°C

PTS: 1 DIF: Webb's I OBJ: 2/1 STA: SC.A.1.3.1

46. ANS: grams

PTS: 1 DIF: Webb's I OBJ: 1/1 STA: SC.A.1.3.2

47. ANS: density

PTS: 1 DIF: Webb's I OBJ: 1/1 STA: SC.A.1.3.1

48. ANS: chemical

PTS: 1 DIF: Webb's I OBJ: 9/2 STA: SC.A.1.3.5

49. ANS: physical

PTS: 1 DIF: Webb's I OBJ: 3/1 STA: SC.A.1.3.5

50. ANS: chemical

PTS: 1 DIF: Webb's I OBJ: 7/2 STA: SC.A.1.3.5

51. ANS: light

PTS: 1 DIF: Webb's I OBJ: 8/2 STA: SC.A.1.3.1 SC.A.1.3.5

52. ANS: chemical

PTS: 1 DIF: Webb's I OBJ: 8/2 STA: SC.A.1.3.5

53. ANS: physical

PTS: 1 DIF: Webb's I OBJ: 1/1 STA: SC.A.1.3.5

54. ANS: chemical

PTS: 1 DIF: Webb's I OBJ: 8/2 STA: SC.A.1.3.5

55. ANS: chemical

PTS: 1 DIF: Webb's I OBJ: 7/2 STA: SC.A.1.3.5

56. ANS: liquid, plasma

PTS: 1 DIF: Webb's I OBJ: 2/1 STA: SC.A.1.3.1

57. ANS: water vapor

PTS: 1 DIF: Webb's I OBJ: 7/2 STA: SC.A.1.3.1

58. ANS: physical

PTS: 1

59. ANS: matter

PTS: 1

60. ANS: states of matter

PTS: 1

61. ANS: boiling point

PTS: 1

62. ANS: density

PTS: 1

63. ANS: temperature

PTS: 1

64. ANS: melting point

PTS: 1

65. ANS: conservation of mass

PTS: 1

66. ANS: volume

PTS: 1

67. ANS: properties

PTS: 1

68. ANS: melting point

PTS: 1

69. ANS: plasma

PTS: 1

70. ANS: combustibility

PTS: 1

71. ANS: conservation of mass

PTS: 1

72. ANS: physical change

PTS: 1

73. ANS: physical

PTS: 1

74. ANS: physical

PTS: 1

75. ANS: Chemical

PTS: 1

76. ANS: physical

PTS: 1

77. ANS: chemical

PTS: 1

78. ANS: physical

PTS: 1

79. ANS: physical

PTS: 1

80. ANS: chemical

PTS: 1

81. ANS: chemical

PTS: 1

82. ANS: chemical

PTS: 1

83. ANS: physical

PTS: 1

ESSAY

84. ANS:
Measure the volume of a quantity of water. Add the metal and measure the volume again. Subtract the first measurement from the second.

PTS: 1 DIF: Webb's II OBJ: 1/1 STA: SC.A.1.3.1

85. ANS:
All matter is made up of moving particles. The particles of a solid vibrate in fixed position. The particles of a liquid move faster and can slide over each other. Gas particles move very quickly and are relatively far apart.

PTS: 1 DIF: Webb's II OBJ: 2/1 STA: SC.A.1.3.4

86. ANS:
Put the mixture into water. The sand will sink and the plastic foam will float.

PTS: 1 DIF: Webb's II OBJ: 3/1 STA: SC.A.1.3.1

87. ANS:
They are all transparent.

PTS: 1 DIF: Webb's II OBJ: 1/1 STA: SC.A.1.3.1 SC.A.1.3.5

88. ANS:
It has the ability to change when exposed to oxygen. You can tell because it turns brown when exposed to oxygen.

PTS: 1 DIF: Webb's II OBJ: 7/2 STA: SC.A.1.3.1 SC.A.1.3.5

89. ANS:
Iron reacts when exposed to oxygen. The iron will rust.

PTS: 1 DIF: Webb's II OBJ: 7/2 STA: SC.A.1.3.1

90. ANS:
It is a physical change because the cream is still cream, even though it has changed form.

PTS: 1 DIF: Webb's II OBJ: 3/1 STA: SC.A.1.3.5

91. ANS:
A physical change. The water has evaporated and left the sugar. Neither substance has changed identity.

PTS: 1 DIF: Webb's II OBJ: 3/1 STA: SC.A.1.3.5

92. ANS:
Physical changes, because each substance keeps its identity and can be recovered.

PTS: 1 DIF: Webb's II OBJ: 3/1 STA: SC.A.1.3.5

93. ANS:
No, the missing mass escaped in bubbles as a gas.

PTS: 1 DIF: Webb's II OBJ: 10/2 STA: SC.A.1.3.1

94. ANS:
Measure the mass of both solutions before mixing, and compare that with the mass of the resulting substance.

PTS: 1 DIF: Webb's II OBJ: 10/2 STA: SC.A.1.3.1

95. ANS:
The particles that make up the original substances are merely rearranged to make new substances. They still exist in the new substances.

PTS: 1 DIF: Webb's II OBJ: 10/2 STA: SC.A.1.3.5

96. ANS:
Answers will vary. The following are some possible responses. Both are round and have a hole in the middle. The tire is about 80 cm in diameter, hollow, black, and made of rubber. The donut is about 9 cm across, solid, made of dough, smells sweet, and is brown on the outside.

PTS: 1

97. ANS:
Physical changes might change the form of a substance but not its identity. Chemical changes change the identity of the substance. If substances are separated by physical means, both substances will retain their identity.

PTS: 1

98. ANS:
The chemical properties of a substance give it the ability to undergo certain chemical changes.

PTS: 1

99. ANS:
Measure and record a volume of water that has been placed in a container that is marked in mL. Add the stone to the water. Measure and record the second volume. Subtract the first volume from the second volume to find the volume of the stone.

PTS: 1

100. ANS:
The two solutions contain different chemicals, and have different chemical properties.

PTS: 1

MATCHING

101. ANS: D PTS: 1

102. ANS: H PTS: 1

103. ANS: M PTS: 1

104. ANS: A PTS: 1

105. ANS: K PTS: 1

106. ANS: F PTS: 1

107. ANS: E PTS: 1

108. ANS: B PTS: 1

109. ANS: O PTS: 1

110. ANS: L PTS: 1

111. ANS: N PTS: 1

112. ANS: G PTS: 1

113. ANS: J PTS: 1

114. ANS: C PTS: 1

115. ANS: P PTS: 1

116. ANS: I PTS: 1

117. ANS: D PTS: 1

118. ANS: E PTS: 1

119. ANS: A PTS: 1

120. ANS: B PTS: 1

121. ANS: C PTS: 1

SHORT ANSWER

122. ANS:
No, they have not changed. According to the law of conservation of mass, mass does not change after a chemical reaction. Mass is not destroyed. The substances have only changed form.

PTS: 1 DIF: Webb's II STA: SC.A.1.3.5

123. ANS:
That it is more dense than the top layer and less dense than the bottom layer.

PTS: 1 DIF: Webb's II STA: SC.A.1.3.1

124. ANS:
You could use solubility. Sugar is soluble in water and sand is not. Add water to the mixture to dissolve the sugar, and filter the liquid. Then evaporate it to get the sugar back.

PTS: 1

125. ANS:
The iron in the nail reacts with oxygen in the air to form rust. The additional mass comes from the oxygen.

PTS: 1

126. ANS:
a. C
b. B
c. B, C
d. A, B, C

PTS: 1

127. ANS:
Color, size, shape, smell, and taste can be used to describe an apple. These are physical properties.

PTS: 1

128. ANS:
Gasoline combines with oxygen to produce gases. The combined mass of the gases is equal to the mass of the gasoline plus oxygen.

PTS: 1

129. ANS:
a. white, malleable, ductile, density, melting point, boiling point
b. doesn’t react with water or oxygen; doesn’t react with most acids; reacts with nitric acid

PTS: 1

130. ANS:
Iron is attracted to a magnet and sawdust is not. Stir the mixture with a magnet and the iron filings will cling to it, leaving the sawdust behind. Another way would be to add water to the mixture. The sawdust would float and the iron filings would not.

PTS: 1