Answer:
The pre-metamorphic rock was a shale or mudstone containing organic matter
Explanation:
Graphite schist is a rock that is formed during the metamorphism of coal. This metamorphism can be either higher level or an intermediate level of metamorphism.
The various attributes of a Graphite schist are:
a. It has a metallic shine
b. It has a very soft texture
c. It stains paper easily.
Graphite schist contains graphite in a very high proportion.
Answer:
Scientists attribute the global warming trend observed since the mid-20th century to the human expansion of the "greenhouse effect" — warming that results when the atmosphere traps heat radiating from Earth toward space.
Certain gases in the atmosphere block heat from escaping. Long-lived gases that remain semi-permanently in the atmosphere and do not respond physically or chemically to changes in temperature are described as "forcing" climate change. Gases, such as water vapor, which respond physically or chemically to changes in temperature are seen as "feedbacks."
Gases that contribute to the greenhouse effect include:
Nitrous Oxide
Methane
Water Vapor
Carbon Dioxide
Hope that helps!
Stars in the main sequence are fusing Hydrogen into Helium in their cores.
The answer to this question is B. Cold Front
Answer:
Adminstrative divisons based on geographical separations
Explanation:
After its conquest, Spanish America split its entire territoryalong geographical divisions such as the Andes Mountains to better manage its territories. This, like in other colonized regions, created cultural divisons in peoples that were once unified.
