The oxygen in the earth's atmosphere was probably produced by which of the following? w) volcanos x) photosynthetic organisms y) radioactive minerals z) meteors

The oxygen in the earth's atmosphere was probably produced by which of the following? w) volcanos x) photosynthetic organisms y) radioactive minerals z) meteors
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1 Answer

Answer :

ANSWER: X -- PHOTOSYNTHETIC ORGANISMS
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Which physical phenomenon or principle is most often applied in the search for petroleum reservoirs? w) magnetic field distortions x) electromagnetic radiation y) natural radioactive decay of minerals z) acoustic wave transmission and reflection

Description : Which physical phenomenon or principle is most often applied in the search for petroleum reservoirs? w) magnetic field distortions x) electromagnetic radiation y) natural radioactive decay of minerals z) acoustic wave transmission and reflection

Last Answer : ANSWER: Z -- ACOUSTIC WAVE TRANSMISSION AND REFLECTION  

Which physical phenomenon or principle is most often applied in the search for petroleum reservoirs? w) gravitational attraction x) magnetic field distortions y) natural radioactive decay of minerals z) acoustic wave transmission and reflection

Description : Which physical phenomenon or principle is most often applied in the search for petroleum reservoirs? w) gravitational attraction x) magnetic field distortions y) natural radioactive decay of minerals z) acoustic wave transmission and reflection

Last Answer : ANSWER: Z -- ACOUSTIC WAVE TRANSMISSION AND REFLECTION

The jet-stream lies between which two layers of th earth's atmosphere? w) thermosphere and ionosphere x) mesosphere and thermosphere y) troposphere and stratosphere z) stratosphere and mesosphere

Description : The jet-stream lies between which two layers of th earth's atmosphere? w) thermosphere and ionosphere x) mesosphere and thermosphere y) troposphere and stratosphere z) stratosphere and mesosphere

Last Answer : ANSWER: Y -- TROPOSPHERE AND STRATOSPHERE

What percentage of the earth's atmosphere does O2 comprise? w) 75% x) 50% y) 21% z) 32%

Description : What percentage of the earth's atmosphere does O2 comprise? w) 75% x) 50% y) 21% z) 32%

Last Answer : ANSWER: Y -- 21%

Which of the following processes doesn't account for an increase in atmospheric CO2 (carbon dioxide) levels? w) deforestation x) photosynthetic processes y) plant respiration z) fossil fuel combustion

Description : Which of the following processes doesn't account for an increase in atmospheric CO2 (carbon dioxide) levels? w) deforestation x) photosynthetic processes y) plant respiration z) fossil fuel combustion

Last Answer : ANSWER: X -- PHOTOSYNTHETIC PROCESSES

Which element in chlorofluorocarbons (CFCs) is responsible for destroying the Earth's ozone layer? w) oxygen x) fluorine y) chlorine z) bromine

Description : Which element in chlorofluorocarbons (CFCs) is responsible for destroying the Earth's ozone layer? w) oxygen x) fluorine y) chlorine z) bromine

Last Answer : ANSWER: Y -- CHLORINE

While many different gases are found in the atmosphere, a number do NOT contribute significantly to solar heating of the atmosphere. Which TWO of the following gases do NOT absorb much heat? w) carbon dioxide x) nitrogen y) water vapor z) oxygen

Description : While many different gases are found in the atmosphere, a number do NOT contribute significantly to solar heating of the atmosphere. Which TWO of the following gases do NOT absorb much heat? w) carbon dioxide x) nitrogen y) water vapor z) oxygen

Last Answer : ANSWER: X and Z -- NITROGEN and OXYGEN

Global climate change is being attributed to the atmospheric increase in what two gases produced by human activities? w) oxygen and hydrogen x) ozone and methane y) nitrous oxide and sulfur dioxide z) methane and carbon dioxide e) ozone and carbon monoxide

Description : Global climate change is being attributed to the atmospheric increase in what two gases produced by human activities? w) oxygen and hydrogen x) ozone and methane y) nitrous oxide and sulfur dioxide z) methane and carbon dioxide e) ozone and carbon monoxide

Last Answer : ANSWER: Z -- METHANE AND CARBON DIOXIDE

Which of the following minerals is a source of lead? w) Bauxite x) Hematite y) Malachite z) Galena

Description : Which of the following minerals is a source of lead? w) Bauxite x) Hematite y) Malachite z) Galena

Last Answer : ANSWER: Z -- GALENA

Of the following minerals, the one most resistant to both chemical and mechanical weathering is: w) calcite x) muscovite y) hornblende z) quartz

Description : Of the following minerals, the one most resistant to both chemical and mechanical weathering is: w) calcite x) muscovite y) hornblende z) quartz 

Last Answer : ANSWER: Z -- QUARTZ

Most cave deposits form from which of the followin minerals? w) hematite x) calcite y) quartz z) none of these

Description : Most cave deposits form from which of the followin minerals? w) hematite x) calcite y) quartz z) none of these

Last Answer : ANSWER: X -- CALCITE

Which of the following pairs of minerals are difficult to tell apart because both are always dark in color and almost equally hard? w) muscovite and orthoclase x) muscovite and quartz y) hornblende and talc z) hornblende and augite

Description : Which of the following pairs of minerals are difficult to tell apart because both are always dark in color and almost equally hard? w) muscovite and orthoclase x) muscovite and quartz y) hornblende and talc z) hornblende and augite

Last Answer : ANSWER: Z -- HORNBLENDE AND AUGITE 

Which of the following minerals is a source of copper? w) Bauxite (pron: box-ite) x) Hematite y) Malachite z) Galena

Description : Which of the following minerals is a source of copper? w) Bauxite (pron: box-ite) x) Hematite y) Malachite z) Galena

Last Answer : ANSWER: Y -- MALACHITE

Igneous rocks that form from magma are known as: w) minerals x) granite y) intrusive rocks z) gneiss (pron: nice)

Description : Igneous rocks that form from magma are known as: w) minerals x) granite y) intrusive rocks z) gneiss (pron: nice)

Last Answer : ANSWER: Y -- INTRUSIVE ROCKS

An example of a rock whose minerals have been crushed into thin sheets or bands is: w) shale x) schist y) conglomerate z) granite

Description : An example of a rock whose minerals have been crushed into thin sheets or bands is: w) shale x) schist y) conglomerate z) granite

Last Answer : ANSWER: X -- SCHIST 

Which of these pairs of minerals are always found in granites? w) muscovite and calcite x) quartz and orthoclase y) hornblende and talc z) augite and magnetite

Description : Which of these pairs of minerals are always found in granites? w) muscovite and calcite x) quartz and orthoclase y) hornblende and talc z) augite and magnetite

Last Answer : ANSWER: X -- QUARTZ AND ORTHOCLASE

Which of the following minerals is NOT a silicate? w) orthoclase x) muscovite y) augite (pron: aw-jIt) z) magnetite

Description : Which of the following minerals is NOT a silicate? w) orthoclase x) muscovite y) augite (pron: aw-jIt) z) magnetite

Last Answer : ANSWER: Z -- MAGNETITE

Fine parallel lines, or striations, are most likel to be seen on a cleavage surface of which of the following minerals? w) quartz x) orthoclase y) hornblende z) plagioclase (pron: play-gee-o-klase)

Description : Fine parallel lines, or striations, are most likel to be seen on a cleavage surface of which of the following minerals? w) quartz x) orthoclase y) hornblende z) plagioclase (pron: play-gee-o-klase)

Last Answer : ANSWER: Z -- PLAGIOCLASE

Which of the following minerals is noted for its one perfect cleavage? w) calcite x) muscovite y) quartz z) pyrite

Description : Which of the following minerals is noted for its one perfect cleavage? w) calcite x) muscovite y) quartz z) pyrite

Last Answer : ANSWER: X -- MUSCOVITE 

Which one of the following minerals does NOT contain silica tetrahedrons? w) quartz x) muscovite y) halite z) orthoclase

Description : Which one of the following minerals does NOT contain silica tetrahedrons? w) quartz x) muscovite y) halite z) orthoclase

Last Answer : ANSWER: Y -- HALITE

In geological studies, arkose contains which of th following minerals which gives it a reddish color? w) orthoclase x) calcite y) aragonite (pron: a-rag-o-nite) z) quartz

Description : In geological studies, arkose contains which of th following minerals which gives it a reddish color? w) orthoclase x) calcite y) aragonite (pron: a-rag-o-nite) z) quartz

Last Answer : ANSWER: W -- ORTHOCLASE

Which of the following is the approximate ratio of the area of the continents to the area of the earth's oceans? w) 2:1 x) 1:1 y) 2:5 z) 1:10

Description : Which of the following is the approximate ratio of the area of the continents to the area of the earth's oceans? w) 2:1 x) 1:1 y) 2:5 z) 1:10

Last Answer : ANSWER: Y -- 2:5

Which of the following is TRUE of an earthquake's epicenter and focus? w) they are the same x) the focus is above the epicenter y) the epicenter is at the earth's surface z) the focus is at the earth's inner core

Description : Which of the following is TRUE of an earthquake's epicenter and focus? w) they are the same x) the focus is above the epicenter y) the epicenter is at the earth's surface z) the focus is at the earth's inner core

Last Answer : ANSWER: Y -- THE EPICENTER IS AT THE EARTH'S SURFACE

Which of these events gives us evidence that the earth is spherical? w) a volcanic eruption x) an earthquake y) an eclipse of the moon z) the earth's rotation

Description : Which of these events gives us evidence that the earth is spherical? w) a volcanic eruption x) an earthquake y) an eclipse of the moon z) the earth's rotation

Last Answer : ANSWER: Y -- AN ECLIPSE OF THE MOON

Which of the following causes the oblate spheroid shape of the earth? w) the earth's magnetism x) the earth's gravity y) the earth's rotation z) the moon's tidal pull

Description : Which of the following causes the oblate spheroid shape of the earth? w) the earth's magnetism x) the earth's gravity y) the earth's rotation z) the moon's tidal pull

Last Answer : ANSWER: Y -- THE EARTH'S ROTATION

Which of the following elements is found in the earth's crust as both a native element and as a compound? w) argon x) copper y) chlorine z) silicon

Description : Which of the following elements is found in the earth's crust as both a native element and as a compound? w) argon x) copper y) chlorine z) silicon

Last Answer : ANSWER: X -- COPPER

In geological studies, a fault in the earth's surface in which the hanging wall has moved down relative to the footwall is termed: w) normal fault x) reverse fault y) upthrust fault z) none of these

Description : In geological studies, a fault in the earth's surface in which the hanging wall has moved down relative to the footwall is termed: w) normal fault x) reverse fault y) upthrust fault z) none of these

Last Answer : ANSWER: W -- NORMAL FAULT

In geological studies, a fracture in the earth's surface along which movement has taken place is termed: w) tension fracture x) gash fracture y) fault z) none of these

Description : In geological studies, a fracture in the earth's surface along which movement has taken place is termed: w) tension fracture x) gash fracture y) fault z) none of these

Last Answer : ANSWER: Y -- FAULT

The continental shelves comprise what percentage o the Earth's total land area? w) 38 percent x) 28 percent y) 18 percent z) 8 percent

Description : The continental shelves comprise what percentage o the Earth's total land area? w) 38 percent x) 28 percent y) 18 percent z) 8 percent

Last Answer : ANSWER: Y -- 18 PERCENT

The earth's average density is: w) 2.82 grams per cubic centimeter x) 4.75 grams per cubic centimeter y) 5.52 grams per cubic centimeter z) 10.5 grams per cubic centimeter

Description : The earth's average density is: w) 2.82 grams per cubic centimeter x) 4.75 grams per cubic centimeter y) 5.52 grams per cubic centimeter z) 10.5 grams per cubic centimeter 

Last Answer : ANSWER: Y -- 5.52 GRAMS PER CUBIC CENTIMETER

Molten rock beneath the Earth's crust is called: w) magma x) liquicite y) lava z) igneous

Description : Molten rock beneath the Earth's crust is called: w) magma x) liquicite y) lava z) igneous

Last Answer : ANSWER: W -- MAGMA

If all the Earth's ice melted, the increase in sea level would be approximately: w) 100 meters x) 2 meters y) 70 meters z) 20 meters

Description : If all the Earth's ice melted, the increase in sea level would be approximately: w) 100 meters x) 2 meters y) 70 meters z) 20 meters

Last Answer : ANSWER: Y -- 70 METERS

What percentage of the earth's water is fresh water? w) 50% x) 22% y) 7% z) 3%

Description : What percentage of the earth's water is fresh water? w) 50% x) 22% y) 7% z) 3%

Last Answer : ANSWER: Z -- 3%

In geological studies, a fault in the earth's surface in which the hanging wall has moved UP relative to the footwall is termed: w) overthrust fault x) reverse fault y) tear fault z) none of these

Description : In geological studies, a fault in the earth's surface in which the hanging wall has moved UP relative to the footwall is termed: w) overthrust fault x) reverse fault y) tear fault z) none of these

Last Answer : ANSWER: X -- REVERSE FAULT 

During which period, in the earth's history, did MOST dinosaurs become extinct? w) Carboniferous x) Cretaceous y) Quaternary z) Triassic

Description : During which period, in the earth's history, did MOST dinosaurs become extinct? w) Carboniferous x) Cretaceous y) Quaternary z) Triassic

Last Answer : ANSWER: X -- CRETACEOUS

The Greenhouse Effect is caused primarily by which of the following processes? w) blocking incoming short wave solar energy x) absorbing incoming short wave solar energy y) heating of the Earth's stratosphere z) absorbing outgoing long wave radiation from the Earth

Description : The Greenhouse Effect is caused primarily by which of the following processes? w) blocking incoming short wave solar energy x) absorbing incoming short wave solar energy y) heating of the Earth's stratosphere z) absorbing outgoing long wave radiation from the Earth

Last Answer : ANSWER: Z -- ABSORBING OUTGOING LONG WAVE RADIATION FROM THE EARTH 

The earth's climate has been warming since the las glacial period which ended about how many years ago? w) 1,000 to 2,000 years ago x) 10,000 to 20,000 years ago y) 100,000 to 200,000 years ago z) 1,000,000 to 2,000,000 years ago

Description : The earth's climate has been warming since the las glacial period which ended about how many years ago? w) 1,000 to 2,000 years ago x) 10,000 to 20,000 years ago y) 100,000 to 200,000 years ago z) 1,000,000 to 2,000,000 years ago

Last Answer : ANSWER: X -- 10,000 TO 20,000 YEARS AGO

What name is given to the science which studies the atmosphere? w) oceanography x) atmospherology y) meteorology z) weatherology

Description : What name is given to the science which studies the atmosphere? w) oceanography x) atmospherology y) meteorology z) weatherology

Last Answer : ANSWER: Y -- METEOROLOGY

The concentration of carbon dioxide in the atmosphere is in the range of: w) 1-10 parts per million x) 10-100 parts per million y) 100-1000 parts per million z) 1000-10,000 parts per million

Description : The concentration of carbon dioxide in the atmosphere is in the range of: w) 1-10 parts per million x) 10-100 parts per million y) 100-1000 parts per million z) 1000-10,000 parts per million

Last Answer : ANSWER: Y -- 100-1000 PARTS PER MILLION (the exact number is 350 ppm as of the time of this article)

The chemical union of iron, oxygen and water forms w) magnetite x) hematite y) limonite z) pyrite

Description : The chemical union of iron, oxygen and water forms w) magnetite x) hematite y) limonite z) pyrite

Last Answer : ANSWER: Y -- LIMONITE

Global climate change is being attributed to the atmospheric increase in what two gases produced by human activities? w) ozone and methane x) nitrous oxide and sulfur dioxide y) methane and carbon dioxide z) ozone and carbon monoxide

Description : Global climate change is being attributed to the atmospheric increase in what two gases produced by human activities? w) ozone and methane x) nitrous oxide and sulfur dioxide y) methane and carbon dioxide z) ozone and carbon monoxide

Last Answer : ANSWER: Y -- METHANE AND CARBON DIOXIDE 

Mount St. Helens is one of the more active volcanos in the United States today. In what state is Mount St. Helens located?

Description : Mount St. Helens is one of the more active volcanos in the United States today. In what state is Mount St. Helens located?  

Last Answer : ANSWER: WASHINGTON

What is the name of the phenomenon that causes an accumulation of heat in the lower atmosphere because of the absorption of longwave radiation from the Earth's surface?

Description : What is the name of the phenomenon that causes an accumulation of heat in the lower atmosphere because of the absorption of longwave radiation from the Earth's surface?

Last Answer : ANSWER: GREENHOUSE EFFECT

A rock is (A)a naturally occurring, hard, solid substance (B) any hard, solid substance on earth (C)an aggregate of minerals (D)only produced by cooling of magma

Description : A rock is (A)a naturally occurring, hard, solid substance (B) any hard, solid substance on earth (C)an aggregate of minerals (D)only produced by cooling of magma

Last Answer : an aggregate of minerals 

Pangaea is the name of a former continent that included: w) all the continents x) only Europe and Asia y) only South America and Africa z) only North and South America

Description : Pangaea is the name of a former continent that included: w) all the continents x) only Europe and Asia y) only South America and Africa z) only North and South America

Last Answer : ANSWER: W -- ALL THE CONTINENTS

What mineral is the most dense? w) hematite x) cinnabar y) marcasite z) rhodochrosite

Description : What mineral is the most dense? w) hematite x) cinnabar y) marcasite z) rhodochrosite

Last Answer : ANSWER: X -- CINNABAR

Which of the following mountain ranges was formed during the Mesozoic era? w) Rocky Mountains x) Cascades y) Appalachian z) Sierra Nevada

Description : Which of the following mountain ranges was formed during the Mesozoic era? w) Rocky Mountains x) Cascades y) Appalachian z) Sierra Nevada

Last Answer : ANSWER: Z -- SIERRA NEVADA

Sulfuric acid aerosols from the eruption of Mt. Pinatubo reduced the rate of global warming last year. They also contributed to the record size of: w) acid rainfalls in Europe x) the anchovy catch off Peru y) the ozone hole over Antarctica z) fish kills in the Amazon River

Description : Sulfuric acid aerosols from the eruption of Mt. Pinatubo reduced the rate of global warming last year. They also contributed to the record size of: w) acid rainfalls in Europe x) the anchovy catch off Peru y) the ozone hole over Antarctica z) fish kills in the Amazon River

Last Answer : ANSWER: Y -- THE OZONE HOLE OVER ANTARCTICA

Cloud droplets unite most easily to form raindrops in clouds containing which of the following substances? w) ozone x) plant pollen y) carbon tetrachloride z) large salt crystals

Description : Cloud droplets unite most easily to form raindrops in clouds containing which of the following substances? w) ozone x) plant pollen y) carbon tetrachloride z) large salt crystals

Last Answer : ANSWER: Z -- LARGE SALT CRYSTALS

Which of the following is an average number of inches of snow equal to one inch of rain? w) 1 inch x) 5 inches y) 10 inches z) 25 inches

Description : Which of the following is an average number of inches of snow equal to one inch of rain? w) 1 inch x) 5 inches y) 10 inches z) 25 inches

Last Answer : ANSWER: Y -- 10 inches