Earth and Life Science -First Semester (1st Periodical)

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Questions and Answers

Which element is the primary component of Biological Macromolecules?

  • Oxygen
  • Nitrogen
  • Carbon (correct)
  • Hydrogen

What did Stanley Miller and Harold Urey discover in 1952?

  • The first organisms to produce oxygen gas
  • Life started in the oceans (correct)
  • The extreme conditions of earth
  • The organisms called extremophiles

What type of organisms thrived during the extreme conditions of earth?

  • Photosynthetic organisms
  • Extremophiles (correct)
  • Microorganisms
  • Cyanobacteria

Which organisms were the first to produce oxygen gas through photosynthesis?

<p>Cyanobacteria (D)</p> Signup and view all the answers

Which of the following is NOT a type of Biological Macromolecule?

<p>Nucleic acid (D)</p> Signup and view all the answers

What did Stanley Miller and Harold Urey's experiment in 1952 reveal about the origin of life?

<p>Life originated in the oceans (B)</p> Signup and view all the answers

When did the oxygen levels rise to its current level?

<p>600 million years ago (B)</p> Signup and view all the answers

Which of the following is NOT a type of extremophile?

<p>Organisms that can adapt to high temperatures (C)</p> Signup and view all the answers

What is the primary component of Biological Macromolecules?

<p>Carbon (D)</p> Signup and view all the answers

Which layer of the atmosphere contains the ozone layer?

<p>Stratosphere (C)</p> Signup and view all the answers

What is the thinnest part of the geosphere?

<p>Crust (C)</p> Signup and view all the answers

Which sphere of the Earth includes all the microbes, plants, and animals?

<p>Biosphere (B)</p> Signup and view all the answers

Which layer of the atmosphere is responsible for absorbing and scattering solar ultraviolet radiation?

<p>Stratosphere (A)</p> Signup and view all the answers

What is the thickest part of the geosphere?

<p>Lower Mantle (A)</p> Signup and view all the answers

Which of the following is NOT a major component of the atmosphere?

<p>Water Vapor (D)</p> Signup and view all the answers

Which layer of the atmosphere is responsible for absorbing and scattering solar ultraviolet radiation?

<p>Stratosphere (A)</p> Signup and view all the answers

What is the primary component of Biological Macromolecules?

<p>Carbon (B)</p> Signup and view all the answers

Which type of weathering is often triggered by earthquakes, volcanic eruptions, or heavy rainfall?

<p>Fast Mass Wasting (C)</p> Signup and view all the answers

What is the process by which the surface of the earth gets worn down?

<p>Erosion (B)</p> Signup and view all the answers

What is the geological process in which sediments, soil, and rocks are added to landforms or land masses?

<p>Deposition (B)</p> Signup and view all the answers

Which type of weathering is often triggered by earthquakes, volcanic eruptions, or heavy rainfall?

<p>Mass wasting (B)</p> Signup and view all the answers

What are the two types of metamorphic rocks based on the arrangement of mineral crystals?

<p>Foliated and nonfoliated (B)</p> Signup and view all the answers

Which type of magma has low silica content, high temperature, low viscosity, and low gas content?

<p>Basaltic magma (D)</p> Signup and view all the answers

Which type of metamorphism occurs when a large mass of rocks is exposed to differential stress and high temperature?

<p>Regional Metamorphism (A)</p> Signup and view all the answers

What are the processes that take place to produce Sedimentary Rocks?

<p>Weathering, Lithification, Deposition (B)</p> Signup and view all the answers

Flashcards

Main element in macromolecules?

Carbon is the main element in biological macromolecules.

Miller-Urey discovery?

In 1952, Miller and Urey found that life started in the oceans.

Thriving early organisms?

Extremophiles are organisms that thrived in Earth's harsh early conditions.

First O2 producers?

Cyanobacteria used photosynthesis and were the first to produce oxygen gas.

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Miller-Urey experiment?

Life originated in the oceans, recreated in a lab by Miller & Urey.

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When did O2 rise?

Oxygen levels rose to current levels about 600 million years ago.

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Ozone layer location?

The stratosphere contains the ozone layer.

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Thinnest geosphere layer?

The crust is the thinnest part of the geosphere.

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What does the biosphere include?

The biosphere includes all living things: microbes, plants, and animals.

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UV radiation absorption?

The stratosphere absorbs and scatters solar ultraviolet radiation.

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Thickest geosphere part?

The lower mantle is the thickest part of the geosphere.

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Not a major atmospheric component?

Water vapor is not major component of the atmosphere.

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Macromolecule component?

Carbon is the primary component of Biological Macromolecules.

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Triggered weathering?

Fast mass wasting is weathering triggered by earthquakes/volcanoes/heavy rain.

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Wearing earth's surface?

Erosion is the process by which the Earth’s surface wears down.

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Adding sediments to land?

Deposition is when sediments, soil, and rocks are added to landforms.

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Weathering events?

Mass wasting type of weathering is often triggered by earthquakes etc.

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Types of metamorphic

Foliated and nonfoliated are metamorphic rocks based on mineral alignment.

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Magma properties?

Basaltic magma is low in silica, high in temperature, low viscosity, and gas content.

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Large-scale metamorphism?

Regional metamorphism occurs over large areas with differential stress and high temperature.

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Sedimentary rock formation?

Sedimentary rocks form through weathering, lithification, and deposition.

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Study Notes

Biological Macromolecules

  • Carbon is the primary component of Biological Macromolecules

Origin of Life

  • In 1952, Stanley Miller and Harold Urey discovered the building blocks of life, including amino acids, through an experiment simulating early Earth's atmosphere
  • Their experiment revealed that the conditions on early Earth were suitable for the formation of complex molecules, supporting the theory of chemical evolution

Early Earth and Extremophiles

  • During the extreme conditions on early Earth, thermophiles and other extremophiles thrived
  • These organisms were able to survive in environments with high temperatures, high pressures, and high salinity

Oxygen Production

  • Cyanobacteria were the first organisms to produce oxygen gas through photosynthesis
  • Oxygen levels rose to their current level about 2.7 billion years ago

Atmosphere

  • The stratosphere is the layer of the atmosphere that contains the ozone layer
  • The troposphere is the thinnest part of the geosphere
  • The biosphere includes all the microbes, plants, and animals
  • The ozone layer is responsible for absorbing and scattering solar ultraviolet radiation
  • The lithosphere is the thickest part of the geosphere

Geology

  • Weathering is the process by which the surface of the earth gets worn down
  • Deposition is the geological process in which sediments, soil, and rocks are added to landforms or land masses
  • Mechanical weathering is often triggered by earthquakes, volcanic eruptions, or heavy rainfall

Rocks

  • Foliated metamorphic rocks have mineral crystals arranged in layers or bands
  • Non-foliated metamorphic rocks have mineral crystals arranged randomly
  • Mafic magma has low silica content, high temperature, low viscosity, and low gas content
  • Contact metamorphism occurs when a large mass of rocks is exposed to differential stress and high temperature
  • Sedimentary rocks are formed through the processes of erosion, deposition, and lithification

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