In which non-Spanish speaking country do many people speak Spanish?

A group of scientists in Alaska notices that not only have atmospheric CO₂ levels increased at their sampling site but so too ha

oee [108]

Answer: The release of methane from thawed permafrost

Explanation:

With increasing global warming, permafrost in the arctic is melting. The carbon and methyl clathrates present in permafrost escape into the atmosphere to form carbon dioxide and methane, both greenhouse gases.

In the Arctic, molecules of methane are trapped in ice crystals as methyl clathrates. When the temperature increases, these crystals release methyl clathrates which become methane when in contact with the atmosphere.

The cause of the increasing atmospheric $CO{2}$ is due to the the thawing of dead organisms present in the permafrost. As the permafrost melts, these organisms decay and release $CO{2}$ into the atmosphere.

5 0

3 years ago

Read 2 more answers

CO2 is a minor constituent in our atmosphere, with an abundance of less than 0.05% of the gases in this atmosphere. Why, then, i

Lapatulllka [165]

Answer:

Option (C)

Explanation:

CO₂ is one of the main green house gases on earth. A small increase in its concentration can lead to significant changes on earth. When the incoming solar radiations are incident on the earth's surface, some of the energy is absorbed by the atmosphere and the earth's surface. And some of the energy from the land surface after absorption is released into the atmosphere in the form of infrared radiations. The escaping of these radiations from earth is directly dependent on the concentration of CO₂. An increase in the amount of CO₂ will not allow these IR radiations to be removed, and this will result in the global rising of the temperature, leading to catastrophic changes.

Thus, the correct answer is option (C).

5 0

3 years ago

Why do plants have nodules on the roots?

horrorfan [7]

Plants have these because root nodules are formed when nitrogen fixing bacteria called "rhizobia" start to enter the cells of a host plant. Rhizobia normally live inside of the soil and they can exist without a host plant.

3 0

4 years ago

Which of the following answers does NOT fit? Population geography examines

Ratling [72]

Answer:

It is D.

Explanation:

The answer is D because it does not match the definition of the word geography.

8 0

2 years ago

Which of the following would be an important observation that could help you identify a metamorphic rock? Choose one: A. large c

raketka [301]

Answer:

D. the arrangement of mineral grains into a foliation

Explanation:

Due to the tectonic activity of the terrestrial lithosphere, igneous and sedimentary rocks formed in certain environments and under precise environmental conditions, can be subjected to new conditions (essentially pressure and temperature). Under the new conditions, and frequently under the action of tectonic stresses (linked, for example, to the formation of mountain ranges), pre-existing rocks are transformed texturally, structurally and mineralogically into a solid state, giving rise to metamorphic rocks. Its fundamental characteristic is to present blastic texture (i.e., solid state recrystallization), and in cases of deformation, anisotropic factories.

The petrographic characteristics of these rocks are especially complicated, given the solid state transformation processes that they have suffered, usually accompanied by intense deformation. Due to the gradual nature of metamorphic (and deformational) transformations, the characteristics of this type of rock also range from igneous or sedimentary to purely metamorphic.

Foliation

The term foliation (foliatus: leaf-shaped) refers to any planar (almost flat) arrangement of mineral grains or structural features of the interior of a rock. Although there is foliation in some sedimentary rocks and even in a few types of igneous rocks, it is a fundamental characteristic of rocks that have undergone regional metamorphism, that is, rocky units that have folded and deformed greatly. In metamorphic environments, foliation is caused, ultimately, by the compressive efforts that shorten the rock masses, causing the mineral grains of pre-existing rocks to develop parallel or almost parallel alignments. Examples of foliation are the parallel alignment of minerals with planar habit and / or elongated minerals; the parallel alignment of mineral particles and flattened edges; the compositional bandeado where the separation of dark and light minerals generates a laminar appearance, and the blackboard when the rocks easily separate into thin and tabular layers along parallel surfaces. These different types of foliation can be formed in many different ways, such as:

1. Rotation of elongated or planar mineral grains towards a new orientation.

2. Recrystallization of minerals to form new grains that grow in the direction of the preferred orientation.

3. Changes in shape in equidimensional grains to elongated shapes that align in a preferred orientation.

3 0

3 years ago