Download 9. The diagram below represents the radioactive decay of uranium

Element "W" has a half life of 16 years. Element "W" decays into element "U".
2. Which element is the parent element? W
3. What percentage of "W" is left after 16 years? 50%
4. What percentage of "U" is there after 32 years? 75%
5. How many half lives does it take to get "W" down to 12.5%? 3
6. If the sample of radioactive substance is crushed, the half-life of the substance will
a. decrease
b. increase
c. remain the same
7. Which statement correctly describes the geologic cross section below ?
a. The sandstone is younger than the basalt.
b. The shale is younger than the basalt.
c. The limestone is younger than the shale.
d. The limestone is younger than the basalt.
8. Which graph best represents the radioactive decay of uranium-238 into lead-206 ?
a.1
b. 2
c. 3
d. 4
9. The diagram below represents the radioactive decay of uranium-238.
Shaded areas on the diagram represent the amount of
a. undecayed radioactive uranium-238
b. undecayed radioactive rubidium-87
c. stable carbon-14
d. stable lead-206
10. Drainage basins are separated from one another by high ground called _ divide__
11. The area drained by a main river and its tributaries is called __ drainage basin or watershed______
12. A stream which contributes to a main river is called ___ tributary___
13. Origin area of a river is called the __ headwater____
14. When the river’s water overflows its banks it is ___flooded___
15. The area where a river enters a sea, lake or ocean is called __mouth____
16. The steeper a river's slope the _faster__ its speed will be.
17. The faster a river's water is going the _bigger__the pieces of sediment it can carry.
18. A broad looping bend in a river is called a ___meander____
19. The shallowest part of a river is where the water is going the __slowest___
20. Deposition occurs where the river's water is going the ___slowest_____
21. The fastest part of a river when it is curved is the ___outside_____
22. The fastest part of a river when it is going straight is the ____middle____
23. The oldest rock unit at location (as shown on the diagram below) D
28. Fossils are normally only found in ___sedimentary__ rocks ?
29. The process of breaking down rocks at or near the earth's surface is called __meathering_____
30. What happens to the amount of surface area as it is weathered ? ____increases______
31. The 3 factors that control the rate of weathering are _____climate, composition, texture___________
32. Is the rate of decomposition is aided by disintegration.
______yes_______
33. A rounded rock means that it has been weathered by ______water_________
34. A mineral with a hardness of more than 7 will not have a streak. ______true______________
35. What is the surface area of a cube that is 3 cm long, 3 cm wide and 3 cm tall ? _____54 cm2_______
36. Carbonic acid and limestone can form ____caves_____
37. How many types of weathering are there ? ___2______
41. What is the name of the process by which water carries materials from the upper soil horizons down to lower soil
horizons ? ____leaching_______
42. Organic matter from more or less decayed plants and animals is called ___humus_____
43. A poorly developed soil is called ____immature________
44. The A horizon of a soil profile is called the Zone of ___Leaching______
45. The B horizon of a soil profile is called Zone of
__Accumulation______
46. Humus is the primary source of __nitrogen___ in soil.
55. Rocks that allow water to pass through them must be __permeable_______
56. When there is little rain the water table can
____go lower______
57. A(n) __spring___is formed when the water table is exposed at the surface in permeable rock.
58. How many stars are in a galaxy ? ___billions_______
59. The stars that are further from the center of a galaxy have a __faster__orbital speed than those closer in.
60. Approximately 90% of the visible universe’s mass is composed of _____hydrogen__________
61. Into which group do most stars fall ? ______main sequence________
62. ____Polaris_______is the North Star.
63. Are red stars are hotter than blue stars. ____false________
64. A light-year is a unit of _____distance________
68—71. List the following in the correct sequence of a star’s life cycle. ____D C B A_______
a. white dwarf
b. red giant
c. main sequence
d. nebula
65. The fact that the spectra of stars are shifted towards the red suggests that the stars are__moving away______
66. After our star, the next closest star to earth is approximately 12 billion light-years away. ____false_________
67. Stars seem to change position during the night due to the____earth’s rotation_______
72. A nebula becomes a star when fusion takes place in the core
Answer the next 2 questions using the following charts:
78. How much brighter is the sun than Sirius ? ____10,000,000,000_________
Using the H-R Diagram below, answer the following 4 questions:
79. Supergiants have low temperature and
high
absolute magnitudes
80. In general, blue star are the biggest stars. ___true_______
The diagram below is a contour map. Between which two points is the slope of the hill the gentlest ? __C to D_____
81. What is the elevation of the highest contour line shown on the map below ? ____10,700______
82. What does the spacing of contour lines on an area of a map tell you about the topography of that area ?
____steepness_____
83. The contour lines on the map below show elevations above sea level, measured in feet. What is the highest possible
elevation represented on this map ? _____41-49_______
84. How much change in elevation is there between the school at point A and the house at point B ? __70__
85. There is a severe storm brewing in the south and tides are expected to rise 30 feet. How many buildings will have
water in them due to high tide ? ______11_______
Base your answers to the next 2 questions on the map below.
86. Which diagram best represents the profile along a straight line between points C and J ? 2
87. In the map above, what general direction does Tenaya Stream Flow ?_____ southwest____________
88. As one moves away from the mid-atlantic ridge the rocks get______older______________
89. According to Wegener, this was the first continent. ______Pangaea_______________
90. If the theory of sea-floor spreading was correct, we would expect to find_____volcanoes____
middle of the Atlantic Ocean floor
running down the
91. The continents of
South America and Africa seem to fit together like pieces of a puzzle and first
gave rise to the idea of drifting continents.
92. The scientist who first put forth the theory of continental drift was______Wegener__________
93. The average rate of sea-floor spreading is about ______rate of fingernail growth__________
94. Rigid blocks of crust and the upper part of the upper mantle are called_____lithosphere__________________
95. Crustal material is created at a
divergent boundary.
96. Movement along large breaks in plates is called a_______fault________
97. The
epicenter
.
of an earthquake is located on the earth's surface.
Use the table below to answer the following 3 questions.
98. How far can S-waves travel in 6 minutes ? ________1,600_________
99.
If the P-wave from an earthquake arrives 4 minutes and 30 seconds before the S-wave, how far away is the earthquake ?
________3,000___________
100.
If the P-wave arrives 8 minutes after an earthquake occurs, how far away is the epicenter? ___4,750_____________