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kati45 [8]
3 years ago
9

Discuss three examples of volcanic eruptions in Indonesia and how they have changed world history

Geography
1 answer:
muminat3 years ago
7 0
Three major volcanic eruptions in Indonesia were the well-known Krakatoa in 1883, Mt Tambora in 1815 and of Lake Toba 74,000  years ago. They all caused darkening of the atmoshere, up to 6 years for the Lake Toba eruption and causing harvest failuress and no summer in temperate climates from the Mt Tambora eruption. From the Krakatoa erup,tion, 36,000 people died,mainly from tsunamis. It could be heard 160km away. 
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Which is a force that attracts any two pieces of matter in the universe?
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The force that attracts any two pieces of matter in the universe is the gravitational force.

<h3 /><h3>What is gravitational force?</h3>

It corresponds to the force that the earth exerts on bodies and objects, from the attractive and non-repulsive interaction between two bodies. The force of gravity determines the weight of a body, that is, its mass, and is caused by a curvature in space due to a massive body, according to Einstein's theory.

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5 0
2 years ago
Read 2 more answers
NEED ANSWERS ASAP PLEASE
nekit [7.7K]

Explanation:

Question 1:

B. Increased heat and pressure may change the sedimentary rock into metamorphic rock.

In a subduction zone, sediments are usually subject high temperatures and pressures by which they change into metamorphic rocks. Metamorphic rocks are described as changed rocks.

  • In a convergent zone when a plate subducts beneath another, the rock is forced into an environment where heat and pressure is elevated.
  • With available water, a metamorphic change occurs leading to metamorphic rocks.
  • Along a subducting rock, different facies of metamorphic transformations are observed.
  • This slowly goes from low grade to high grade metamorphic transformation.

Learn more:

Metamorphic change brainly.com/question/869769

Question 2:

A. Weathering and erosion.

Weathering and erosion are external processes that must have carved the canyon area from the surroundings.

  • Weathering is the physical disintegration and chemical decomposition of rocks to form sediments and soils.
  • In the process of erosion, the rocks, sediments and soils are then carried away from their original position into other places.
  • These processes combines and interacts to form powerful forces that causes denudation.
  • The major agents here are wind, water, ice, glacier and gravity.

Learn more:

Erosion brainly.com/question/2473244

Question 3:

C. Igneous rock becomes sedimentary rock.

This change is rock cycle change from igneous to sedimentary rocks. This entails the remains of pre-existing forming clasts of sedimentary rocks.

  • The granite that is disintegrated by the process of weathering is an igneous rock. These are rocks that forms through the cooling and solidification of molten magma.
  • The sandstone that results from this process is a sedimentary rock. Sedimentary rocks are usually derived from pre-existing rocks.
  • The process of lithification and sediment compaction under significant pressure causes the sediments to transform igneous rocks.

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Question 4:

D. Clastic sedimentary rock forms from sediment, not from the remains of organisms.

The problem with the classification is that clastic sedimentary rocks are formed from sediments and not remains of organisms. Clastic sedimentary rocks are derived from pre-existing rock materials.

  • Examples are sandstone, silt, gravel e.t.c
  • They formed from sediments that gathers from the weathering of pre-existing rocks.
  • The limestone that formed from the shells of organisms is a biochemical sedimentary rock and not a clastic.

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Question 5:

C. The grains of the rock are aligned in a layered patterns.

The best feature that shows that a metamorphic rock is foliated is the layered arrangement of mineral grains in the rock. Due to intense nature of pressure and temperature metamorphic rocks are subjected to, most their minerals are usually aligned.

  • Pressure can caused the long axis of some platy minerals to form a special texture giving them a schistose foliation.
  • Temperature and pressure can combine to form a sort of metamorphic foliation known as gneissic layering in which the mica domains and quartz rich domains alternate simultaneously.
  • In low grade metamorphism, we can a have sort of slaty cleavage developing too.

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Contact metamorphism brainly.com/question/1970623

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Give the geologic age sequence of the surface bedrock from Ithaca to Watertown.​
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Answer:

Devonian, Silurian, Ordovician

Explanation:

The geologic age sequence of the surface bedrock from Ithaca to water town is Devonian, Silurian, Ordovician.

A bedrock is the hard, solid rock under the material surface of soil or grovel. The material that is on top of the material layer is mostly unconsolidated rock usually consisting of loose particles. Bedrocks have the capacity to expand hundreds of meters. They can even be found extended all the way to the earths crust.

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