True or false : All heterogeneous mixtures must contain three or more substances.
2. Open Ended
30 seconds
1 pt
True or false : Pure substances cannot have a variable composition.
3. Open Ended
30 seconds
1 pt
True or false : Substances maintain their identity in a heterogeneous mixture but not in a
homogeneous mixture.
4. Open Ended
30 seconds
1 pt
True or false : Pure substances are seldom encountered in the "everyday" world.
5. Open Ended
30 seconds
1 pt
True or false : All homogeneous mixtures must contain at least two substances.
6. Open Ended
30 seconds
1 pt
True or false : Heterogeneous mixtures, but not homogeneous mixtures, can have a
variable composition.
7. Open Ended
30 seconds
1 pt
True or false : Pure substances cannot be separated into other kinds of matter by
physical means.
8. Open Ended
30 seconds
1 pt
Homogenous mixture, heterogeneous mixture, or pure substance : 2 substances present, 2 phases present
9. Open Ended
30 seconds
1 pt
Homogenous mixture, heterogeneous mixture, or pure substance : 2 substances present, 1 phase present
10. Open Ended
30 seconds
1 pt
Homogenous mixture, heterogeneous mixture, or pure substance : 1 substance present, 2 phases present
11. Open Ended
30 seconds
1 pt
Homogenous mixture, heterogeneous mixture, or pure substance : 3 substances present, 3 phases present
12. Open Ended
30 seconds
1 pt
Homogenous mixture, heterogeneous mixture, or pure substance : 3 substances present, 1 phase present
13. Open Ended
30 seconds
1 pt
Homogenous mixture, heterogeneous mixture, or pure substance : 1 substance present, 3 phases present
14. Open Ended
30 seconds
1 pt
Homogenous mixture, heterogeneous mixture, or pure substance : 1 substance present, 1 phase present
15. Open Ended
30 seconds
1 pt
Homogenous mixture, heterogeneous mixture, or pure substance : 2 substances present, 3 phases present
16. Open Ended
30 seconds
1 pt
Homogenous mixture, heterogeneous mixture, or pure substance and how many phases : water and dissolved salt
17. Open Ended
30 seconds
1 pt
Homogenous mixture, heterogeneous mixture, or pure substance and how many phases : water and sand
18. Open Ended
30 seconds
1 pt
Homogenous mixture, heterogeneous mixture, or pure substance and how many phases : water, ice, and oil
19. Open Ended
30 seconds
1 pt
Homogenous mixture, heterogeneous mixture, or pure substance and how many phases : water, dissolved sugar, and undissolved sugar
20. Open Ended
30 seconds
1 pt
Homogenous mixture, heterogeneous mixture, or pure substance : water and dissolved sugar
21. Open Ended
30 seconds
1 pt
Homogenous mixture, heterogeneous mixture, or pure substance : water and oil
22. Open Ended
30 seconds
1 pt
Homogenous mixture, heterogeneous mixture, or pure substance : water, wax, and pieces of copper metal
23. Open Ended
30 seconds
1 pt
Homogenous mixture, heterogeneous mixture, or pure substance and how many phases : water, dissolved salt, and dissolved sugar
24. Open Ended
30 seconds
1 pt
Classify each of the pure substances A through
D as elements or compounds, or indicate that no such classification is possible
because of insufficient information : Analysis with an elaborate instrument indicates that substance A contains
two elements.
25. Open Ended
30 seconds
1 pt
Classify each of the pure substances A through
D as elements or compounds, or indicate that no such classification is possible
because of insufficient information : Substance B decomposes upon heating.
26. Open Ended
30 seconds
1 pt
Classify each of the pure substances A through
D as elements or compounds, or indicate that no such classification is possible
because of insufficient information : Heating substance C to causes no change in it.
27. Open Ended
30 seconds
1 pt
Classify each of the pure substances A through
D as elements or compounds, or indicate that no such classification is possible
because of insufficient information : Heating substance D to causes it to change from a solid to a liquid.
28. Open Ended
30 seconds
1 pt
Classify each of the pure substances A through
D as elements or compounds, or indicate that no such classification is possible
because of insufficient information : Substance A cannot be broken down into simpler substances by
chemical means.
29. Open Ended
30 seconds
1 pt
Classify each of the pure substances A through
D as elements or compounds, or indicate that no such classification is possible
because of insufficient information : Substance B cannot be broken down into simpler substances by physical
means.
30. Open Ended
30 seconds
1 pt
Classify each of the pure substances A through
D as elements or compounds, or indicate that no such classification is possible
because of insufficient information : Substance C readily dissolves in water.
31. Open Ended
30 seconds
1 pt
Classify each of the pure substances A through
D as elements or compounds, or indicate that no such classification is possible
because of insufficient information : Substance D readily reacts with the element chlorine.
32. Open Ended
30 seconds
1 pt
True or false : Both elements and compounds are pure substances.
33. Open Ended
30 seconds
1 pt
True or false : A compound results from the physical combination of two or more
elements.
34. Open Ended
30 seconds
1 pt
True or false : In order for matter to be heterogeneous, at least two compounds must be
present.
35. Open Ended
30 seconds
1 pt
True or false : Compounds, but not elements, can have a variable composition.
36. Open Ended
30 seconds
1 pt
Element, compound, or mixture : 1 substance present, 3 elements present
Element, compound, or mixture : 1 substance present, 1 phase present, substance can be
decomposed using chemical means
43. Open Ended
30 seconds
1 pt
Element, compound, or mixture : 3 elements present, composition is definite and constant
44. Open Ended
30 seconds
1 pt
Heterogeneous mixture, a homogeneous mixture, a compound, or an element : a blue-colored, single-phase liquid that when boiled away (evaporated)
leaves behind a solid residue
45. Open Ended
30 seconds
1 pt
Heterogeneous mixture, a homogeneous mixture, a compound, or an element : a "cloudy" liquid that separates into two layers upon standing overnight
46. Open Ended
30 seconds
1 pt
Heterogeneous mixture, a homogeneous mixture, a compound, or an element : a nonuniform, white crystalline substance, part of which dissolves in
alcohol and part of which does not dissolve in alcohol
47. Open Ended
30 seconds
1 pt
Heterogeneous mixture, a homogeneous mixture, a compound, or an element : a colorless gas that cannot be separated into simpler substances using
physical means and that reacts with the metal magnesium to produce both a magnesium - oxygen compound and a magnesium - nitrogen compound
48. Open Ended
30 seconds
1 pt
True or false : A mixture containing copper and sulfur can have a variable composition.
49. Open Ended
30 seconds
1 pt
True or false : In a mixture of copper and sulfur, the two elements maintain their individual properties.
50. Open Ended
30 seconds
1 pt
True or false : In a compound containing copper and sulfur, physical methods can be used to separate the substances present.
51. Open Ended
30 seconds
1 pt
True or false : In a compound containing copper and sulfur, the two elements are chemically combined rather than physically combined.
52. Open Ended
30 seconds
1 pt
Most abundant element(s) in the universe :
53. Open Ended
30 seconds
1 pt
Most abundant element(s) in the Earth's crust :
54. Open Ended
30 seconds
1 pt
Anything that takes up space or has mass :
55. Fill in the Blank
30 seconds
1 pt
The universe is composed entirely of _____ and _____.
56. Fill in the Blank
30 seconds
1 pt
Forms of energy such as heat, light, and electricity are not considered to be _____.
57. Open Ended
30 seconds
1 pt
States of matter :
58. Open Ended
30 seconds
1 pt
Characterized by a definite shape and a definite volume :
59. Open Ended
30 seconds
1 pt
Characterized by an indefinite shape and a definite volume;
takes the shape of its container to the extent that it fills the container :
60. Open Ended
30 seconds
1 pt
Characterized by an indefinite shape and volume;
completely fills its container, adopting both the container's volume and its shape :
61. Open Ended
30 seconds
1 pt
State of matter of a particular substance depends on :
62. Open Ended
30 seconds
1 pt
Distinguishing characteristic of a substance that is used in its identification and description :
63. Open Ended
30 seconds
1 pt
Characteristic that can be observed without changing the basic identity of a substance :
64. Open Ended
30 seconds
1 pt
Characteristic that describes the way a substance undergoes or resists change to form a new substance :
65. Open Ended
30 seconds
1 pt
Change triggered by the presence of energy :
66. Open Ended
30 seconds
1 pt
Process in which a substance changes its physical appearance but not its chemical composition :
67. Open Ended
30 seconds
1 pt
Process in which chemical composition of a substance changes :
68. Open Ended
30 seconds
1 pt
Single kind of matter that cannot be separated into other kinds of matter by any physical means :
69. Open Ended
30 seconds
1 pt
Physical combination of two or more pure substances; have variable chemical composition; can be separated by physical methods :
70. Open Ended
30 seconds
1 pt
Contains visibly different phases, each of which has different properties :
71. Open Ended
30 seconds
1 pt
Contains only one visibly distinct phase, which has uniform properties throughout :
72. Open Ended
30 seconds
1 pt
Pure substance that cannot be broken down into simpler pure substances by chemical means such as a chemical reaction, an electric current, heat, or a beam of light :
73. Open Ended
30 seconds
1 pt
Pure substance that can be broken down into two or more simpler pure substances by chemical or physical means; definite chemical composition; cannot be separated by physical methods :
74. Open Ended
30 seconds
1 pt
Number of known elements :
75. Open Ended
30 seconds
1 pt
Number of naturally occuring elements :
76. Open Ended
30 seconds
1 pt
Number of synthesized elements :
77. Fill in the Blank
30 seconds
1 pt
1 or 2 letter designation for an element derived from the element's name; 2 letter symbols can be the first 2 letters of the element's name; first letter of a _____ _____ is always capitalized and the second is not
78. Open Ended
30 seconds
1 pt
Element names can be derived from :
79. Open Ended
30 seconds
1 pt
Smallest particle of an element that can exist and still have the properties of the element :
80. Open Ended
30 seconds
1 pt
Group of two or more atoms that functions as a unit because the atoms are tightly bound together :
81. Open Ended
30 seconds
1 pt
Contains 2 atoms :
82. Open Ended
30 seconds
1 pt
Contains 3 atoms :
83. Open Ended
30 seconds
1 pt
All atoms present are of the same kind; must be an element :
84. Open Ended
30 seconds
1 pt
2 or more kinds of atoms are present; must be a compound :
85. Fill in the Blank
30 seconds
1 pt
_____ _____ consist of : symbols of each element in a compound with numerical subscripts to indicate the number of atoms of each element in the compound.