Most metamorphic processes take place B. a few kilometers below Earth’s surface.
Metamorphism is the change of minerals or geologic texture in pre-existing rocks without the protolith melting into liquid magma. Metamorphism often occurs on two scales: contact and regional. Contact metamorphism occurs locally in areas adjacent to igneous intrusions or in areas that are in contact with hot water known as hydrothermal fluids. Whereas regional metamorphism occurs over much larger areas such as rising mountain ranges, large igneous intrusions can form and warp overlying strata increasing the pressures above the intrusion. Regional metamorphism usually produces foliated rocks such as gneiss and schist.
There are other ways that metamorphic rocks can form, Dynamic metamorphism. Dynamic Metamorphism also occurs because of mountain-building. The huge forces of heat and pressure cause the rocks to be bent, folded, crushed, flattened, and sheared.
Metamorphic rocks form when increased heat and pressure force physical changes in the crystalline structure of an existing rock. Under the right conditions, any type of rock can become a metamorphic rock including igneous rocks, sedimentary rocks, and even other metamorphic rocks. Therefore metamorphic processes result due to intense heat and high pressure below the Earth's surface.
Grade: 9
Subject: biology
Chapter: metamorphic processes
Keywords: metamorphic processes
Most metamorphic process takes place a few kilometres below Earth’s surface. The metamorphic process occurs due to the presence of intense heat and high pressure below the surface of Earth.
Further Explanation:
The metamorphism of rocks is due to either due to the physical or chemical alteration by dense heat and high pressure exhibited by a sedimentary or igneous material into a denser form. Rocks are compacted into a smaller volume of space due to actions of tectonic plates, presence of shearing forces for a more extended period, stress and compression. All these factors play an essential role in the wrapping and deformation of rocks.
Due to this, the metamorphic rocks are denser than the original sedimentary material. So such rocks are less susceptible to breakdown due to erosion. The process of metamorphism is also influenced by chemically active fluids that are circulated around the newly forming rock and also introduce different ions results in the formation of a new and different mineral.
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Answer Details:
Grade: High School
Subject: Biology
Topic: Minerals and Rocks
Keywords:
Metamorphic rocks, erosion, sedimentary rocks, rocks, igneous rocks, minerals, chemicals, lava, temperature, pressure.
Answer: Air pollution.
Air pollution occurs when harmful substances are introduced into the atmosphere. These substances majorly exist in two forms i.e solid ( particulate matter in air) and gaseous form.
CFCs (Chlorofluorocarbons) are compound consisting of Chlorine, fluorine, and carbon atoms. They are released in the atmosphere through aerosol sprays, air conditioners, refrigerators etc. Due to longer lifespan in the stratosphere, they can cause damage to the ozone layer thereby reducing earth's protection from harmful UV radiation. Also, they have warming effects which may cause global warming.
Smog is primarily named for the mixture of smoke and fog in the air. It is a blackish fog formed in the atmosphere mainly due to the reaction of various gases with dust and water vapors. it causes breathing difficulty and other harmful consequences.
b. All female offspring inherit their mother's mitochondria, and therefore the same mitochondrial DNA.
c. As a result, all female family members that share a maternal lineage would have the same mitochondrial DNA.
d. Mitochondrial DNA can therefore be used to confirm or eliminate a person's relationship within a maternal line, but cannot be used to identify a specific individual.
e. All offspring inherit their father's mitochondria, and therefore the same mitochondrial DNA.
Answer:
a. Mitochondrial DNA is inherited through the maternal lineage.
d. Mitochondrial DNA can therefore be used to confirm or eliminate a person's relationship within a maternal line, but cannot be used to identify a specific individual.
Explanation:
DNA is the genetic material. Nuclear DNA profiling is used to identify a person since each individual has unique DNA. Mitochondrial DNA exhibits maternal inheritance. All the offspring of a female share the same mitochondrial DNA. Therefore, all the individuals that are related by maternal lines, share the same mitochondrial DNA. The profiling of their mitochondrial DNA would not allow the identification of a person when individuals share maternal lines.
false
2. It is safe to tell an online acquaintance (someone you have never met in person) your:
A. full name
B. address
C. phone number.
D. favorite music
The correct options are as follows:
1. TRUE.
Your online chat name is your identity, which you use on the internet to communicate with your old friends and new friends, who you have just met and who you probably haven't met personally. It is of utmost importance that you don't use or reveal your full name online. This is because, your full name is the only thing some hackers need to get all the information they need about you. Through that single information, they can cause great havoc for you, like emptying your bank account, using your identity to commit fraud, stealing your email password and sending fraud messages through your box, etc.
2. D.
It is safe to tell an internet friend your favorite music. That is a relatively non important personal information that you can share with anybody. Such an information can not be used against you in any significant way. But sharing personal information such as full name, address and phone numbers can be very dangerous indeed if such information is shared with the wrong person.