Answer: They began as another type of rock, and they form when the rock is subjected to high-pressure or high-heat.
Explanation:
Metamorphic rocks can sometimes look like their pre-existing rocks, but it's not common.
Metamorphic rocks are formed when sedimentary or igneous rocks are changed through extreme heat and pressure. They maintain some features of their original form but also acquire new characteristics due to the transformational process. Hence, they may or may not resemble their preexisting form.
Metamorphic rocks are formed when sedimentary or igneous rocks are subjected to extreme heat and pressure, altering them physically and chemically, a process known as metamorphism. This process occurs within Earth's crust due to geological activity that carries surface rocks down to tremendous depths and then returns them to the surface. Hence the term metamorphic, which means 'changed in form'.
Unlike primitive rocks which have not experienced significant heat or pressure, metamorphic rocks have undergone these transformative processes. As an example, a block of quartzite is the result of multiple transformations, starting as primitive earth material, becoming igneous rock through heating, then sedimentary rock through chemical transformation and redeposition, and ultimately metamorphic rock when subjected to the intense heat and pressure beneath the earth's surface.
As for the appearance, metamorphic rocks often maintain some features of their original pre-metamorphic condition while also taking on new characteristics as a result of the metamorphic process. This means they may bear some resemblance to their original form, but will also have distinctly different features. For example, quartzite which was formed from sandstone will have a harder, denser structure and yet often retains some semblance of its layered, sandy look.
#SPJ11
Answer:
Language and Religion
Explanation:
b. lines of latitude
c. elevations
d. lines of longitude
There are several types of pollution caused by human activities that are contributing to the deterioration of coral reefs. The first and most significant type is chemical pollution.
This includes oil spills, pesticides, herbicides, fertilizers, and other chemicals that are being dumped into the oceans. These chemicals can leach into the coral reefs, disrupting the delicate balance of the ecosystem and causing damage to the coral.
Another type of pollution is plastic pollution. Plastic waste is one of the most significant environmental issues facing our oceans today. Plastic waste is ingested by marine life, including coral, and can cause physical harm. Plastics also release toxic chemicals when they break down, contributing to the chemical pollution problem.
Sedimentation is also a significant issue facing coral reefs. When soil is eroded from construction sites or farming activities, it can find its way into the ocean and smother coral reefs. This can reduce the amount of light that reaches the coral, inhibiting its ability to photosynthesize and grow.
Finally, global warming and climate change are also contributing to the decline of coral reefs. As temperatures rise, coral becomes more susceptible to disease and bleaching, which can kill large areas of coral. Additionally, ocean acidification, which occurs as the oceans absorb more carbon dioxide, can make it more difficult for coral to build their skeletons and grow.
Overall, the combination of these types of pollution is contributing to the decline of coral reefs around the world, and urgent action is needed to reduce our impact on these vital ecosystems.'
To learn more about coral reefs here:
brainly.com/question/15794949#
#SPJ11
The correct answer is - cools, moves to the side, and sinks, making a circular pattern.
The mantle convection is the one responsible for the movement of the tectonic plates, as well as for the destruction, recycling, and creating of new crust on the surface of the Earth.
Once the material from the mantle reaches the surface, it starts to fill in the gap and expand, thus creating new crust as it cools off, and it moves sideways, which pushes the older crust. The older crust sinks at other place where it subducts, thus is getting melted into the mantle and recycled, and over time, that recycled material will come on the surface again, thus creating a circular pattern.