Mafic Study guides, Class notes & Summaries

Which is not a requirement for a mineral? A) naturally occurring B) consistent isotopic composition C) well-formed external crystal shapes D) orderly regular atomic or ionic structure E) definite chemical composition - B Which of the following best describes the fundamental concept of superposition? A) Strata with fossils are generally deposited on strata with no fossils. B) Older strata are deposited on younger strata without intervening, intermediate age strata. C) An igneous dyke cut...

LUOA earth science module 2 questions and answers 100% pass Copper is generally used for electrical wiring All rocks are made of minerals We all use minerals every day. We brush our teeth with toothpaste containing ____________, an abrasive powder that scrubs our teeth. We take a shower, get out and maybe put __________ powder on us. We turn on the light switch that has wires made of ___________. calcite, talcum, copper Why is oil not a mineral? (Choose 2) because it is a liquid, because it i...

SCSC EXAM ACTUAL EXAM QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) | ALREADY GRADED A+ Five soil forming factors active factors - ANSWER- -climate -biological activity Five soil forming factors passive factor - ANSWER- -parent material -time Five soil forming factors modifying factor - ANSWER- -topography (relief) relief - ANSWER- topography 6 key roles of soil - ANSWER- - medium for plant growth (nutrients, support, water, O2) - system for water supp...

RECRYSTALIZATION WHEN MINERALS GROW WITHOUT BEING MELTED DUE TO HEAT/PRESSURE FOLIATION An arrangement of minerals in flat or wavy parallel bands. MAFIC COMPOSITION OF IGNEOUS ROCK, HIGH DENSITY, IRON,MAGNESIUM PRECIPITATE A solid that forms from a solution during a chemical reaction in water. BANDING IN ROCKS EXTREME MINERAL ALLIGNMENT CONTACT METAMORPHISM a change in the texture, structure, or chemical composition of a rock due to contact with heat from...

Which of the following best describes the fundamental concept if superposition? - Any sedimentary deposit accumulates on older rock or sediment layers. New oceanic crust and lithosphere are formed at ______________ - divergent boundaries by submarine eruptions and intrusions of mafic magma Deep ocean trenches are surficial evidence for _________________ - Sinking of oceanic lithosphere into the mantle at a subduction zone. Since the early Mesozoic, the ________ has been passive tectonica...

Compared to the age of the Universe of about 14 billion years, the currently accepted age of Earth is about ________ years as determined by using radioactivity for dating rocks and minerals. A) 4.6 thousand B) 4.6 billion C) 5.4 million D) 13.7 billion - B The ________ division of the geologic time scale is an era of the Phanerozoic Eon. A) Paleocene B) Paleozoic C) Permian D) Proterozoic - B The Earth's core was formed from ________. A) a massive nickel iron asteroid that was the n...

Bowens reaction series tells us that mafic minerals such as olivine and pyroxene crystallize from a magma chamber at relatively higher temperatures than felsic minerals such as K-feldspar and quartz. If a magma chamber undergoes fractional crystallization during cooling, the remaining magma should be_________ than the parent magma. - correct answerMore felsic The Earth's upper mantle is mainly made of peridotite, an ultramafic igneous rock with lots of olivine crystals. Which type of magma c...

smart work for exam 1 questions & answers 2023/2024 Wegener's theory of continental drift took decades to be acceptedChoose one: A. because many of Wegener's ideas turned out to be wrong. B. because of pure stubbornness by the scientific community. C. because climate, fossil distributions, and land shape offered conflicting evidence. D. because Wegener couldn't explain how continents moved. - ANSWER-D Oceanic crustChoose one: A. is the same age as continental crust. B. has the s...

Earth Science-Exam 1 Questions and Answers 100% Pass What are the two different kinds of crust? - Correct Answer ️️ -Oceanic and Continental Which crust is denser? - Correct Answer ️️ -Oceanic Which crust is thicker? - Correct Answer ️️ -Continental What specific type of rock is each type of crust made of? - Correct Answer ️️ - Continental-granite Oceanic-basalt What layer contains the crust and the upper mantle? - Correct Answer ️️ -Lithosphere What is unusual abou...

Where and why do earthquakes occur? - ANSWER-Earthquakes occur along plate boundaries and faults due to rocks underground breaking along a fault Are faults the same as plate boundaries? - ANSWER-No; Faults are cracks in rocks/plates, and plate boundaries are where the plates end (Plate boundaries are all faults, but not all faults are plate boundaries - most are not) What are the major types of seismic waves? Which travels fastest? Which causes most damage? - ANSWER-P and S waves. S waves ...