Name: ________________________________________ 8A
Sedimentary Rock HW #1
Date: ________________
1.
A sedimentary rock composed of rounded particles about 0.1 cm in diameter is best classified as
(1) sandstone (2) rock salt (3) shale (4) conglomerate
2.
A student found 2 samples of fine-grained, dark-colored rocks. One was coal and the other was shale. Which classification best matches these 2 rock samples?
(1) Coal and shale are both organic in origin
(2) Coal and shale are both clastic (fragmental) rocks
(3) Coal is organic and shale is clastic (fragmental)
(4) Coal is clastic (fragmental) and shale is organic
3.
What is the main difference between the clastic rocks, conglomerate and sandstone?
4.
What are some common features of sedimentary rocks?
5.
Which sedimentary rock forms when seawater evaporates?
(1) Rock gypsum (2) shale (3) conglomerate (4) breccias
6.
Which process would not be the final step in forming a sedimentary rock?
(1) Evaporation of seawater
(2) Cementation of rounded rock particles
(3) Compression of fine particles of clay
(4) Weathering and erosion of a sand dune
7.
In which natural environment are most sedimentary rocks formed?
(1) Molten, liquid magma inside a volcano
(2) High mountains covered by snow and ice
(3) Ocean basins with thick deposits of silt and mud
(4) Earth’s center where heat and pressure are extreme
8.
Which rock is composed of particles of feldspar, quartz, and other minerals that are approximately 0.001 cm in diameter?
(1) siltstone (2) breccia (3) dolostone (4) coal
9.
How are conglomerate and breccias different?
(1) Mineral composition
(2) Shape of fragments
(3) Density
(4) Grain size

Sedimentary Rock HW #2
1.
A hill of gravel (sedimentary particles) is composed primarily of rounded pebbles.
What series of events would most likely transform this material into a sedimentary rock?
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2.
Base your answers to questions 83 through 85 on the cross section below, which represents a glacier moving down a mountain valley. The water from the melting glacier is flowing into a lake.
Letter A represents a location on the bottom of the lake.
Describe the most likely shape of a cross section of the glacial valley as viewed from the lake.
Hint: what shape are glacial valleys?
After the glacier melts, what evidence might be found on the surface of the bedrock indicating that the glacier had passed over the surface?
Sediments found at location A range in diameter from 0.0004 to 0.006 centimeter. What name is given to this size sediment?