Rock Characteristics
What physical law assures us that the amount of material in the earth doesn't change? (P.223)
What is the law of the conservation of matter.
A dense rock containing distorted fossils.
(pp 226-227. 232-234, 239-241)
About how old are the oldest sedimentary rocks according to young-earth view of Earth's history? (P.230)
According to a young-earth view, the oldest sedimentary rocks are probably no older than about 5500 years old, the amount of time since the Flood.
A key step in classifying a rock is determining how old it is. (pp. 224-225)
What is False.
The look and feel of a rock is its ?
What is Texture
What is a rock? (P. 223)
A rock is solid material in the earth's crust that is a natural mixture of minerals or other materials.
A hard rock with large, interlocking mineral crystals?
(pp. 226–27, 232–34, 239–41)
What is igneous.
Which of the four steps to form a sedimentary rocks do not apply to a chemical sedimentary rock? (P.231)
Chemical sedimentary rocks do not consist of eroded clasts, so there is no erosion and cementation. Chemical precipitates form deposits that are compacted.
The classification and identification of rocks is called mineralogy. (p.223)
What is False
The crystals & particles in a rock are called?
What are grains.
An igneous rock has large, distinct mineral crystals embedded in fine crystal grains, What kind of texture does it have? (Page 227-228)
What is porphyritic texture.
A somewhat soft rock with flaky layers or bands of minerals.
(pp. 226–27, 232–34, 239–41)
What is metamorphic
How may thick limestone deposits have formed all over the world because of the Flood? (p. 233)
Flood geologists believe that global volcanic activity could have greatly increased the amount of carbon dioxide absorbed in seawater, contributing to the formation of carbonate minerals and limestone.
Color is not a reliable way to classify rocks. (p. 224)
What is True
High-quality marble rock would most likely be used for?
veneer stone on large government buildings
Compare the colors of basaltic and felsic (or rhyolitic) rocks. ( Page. 228)
Basaltic rocks tend to be darker. Felsic or rhyolitic rocks tend to be lighter and have some color.
A rock made almost entirely of fossil shells loosely cemented together?
(pp. 226–27, 232–34, 239–41)
What is sedimentary.
Where in the world would you expect to find the results of regional metamorphism? (p.237)
You would expect to find the results of regional metamorphism in places of mountain building or near convergent tectonic plate margins.
A coarse texture applies more to the size and shape of the grains in a rock than to how it feels to the touch. (p.225)
What is True.
Obsidian has a glassy sheen and no visible crystals
What is Extrusive
What kind of igneous rock looks like black, broken glass? (P. 229)
What is obsidian.
A rock containing sharp, broken pieces of other rocks surrounded by cemented sand grains.
(pp. 226–27, 232–34, 239–41)
What is sedimentary
Why could meteorite impact metamorphism be considered a type of dynamic metamorphism? (p.239)
Dynamic metamorphism changes rocks rapidly. A meteorite impact is a momentary change of pressure and heat, so metamorphism from an impact could be considered dynamic metamorphism.
The main classification difference between siltstone and shale is the way that they feel (siltstone is rougher).
What is False. The main difference between siltstone and shale is their fracture.
Rock that has changed due to heat and/or pressure is a(n) ____________rock
What is metamorphic