Answer:
Options (A), (B), (C), and (D)
Explanation:
The volcanic activity refers to the eruption of magma at the surface of the ocean floor and continental land areas, forming volcanoes.
Some of the tectonic settings that are associated with volcanic activity are as follows-
- Mantle plumes- These are the large uprising bodies of magma that are generated due to the formation of convection current in the mantle. These are localized body and are located away from the tectonic boundaries. For example, Hawaii is formed as the plates moved over the mantle plumes.
- Continental rifts- This refers to the eruption of magma at the surface of the continents, due to the divergent motion of two continental plates. It results in the formation of a rift, rift valley and then later forms an ocean.
- Island arcs- These are formed due to the collision of two oceanic plates, where the volcanoes are formed on the lighter oceanic plate due to the rising up of magma.
- Continental arcs- These are formed due to the collision between an oceanic and a continental plate, where the volcanoes are formed due to the uprising of magma in the lighter continental plates.
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Answer:
True, members of the Wampanoag tribe helped the colonists survive.
Explanation:
When the colonists first arrived in what is now Massachusets, they didn't really know what they're facing and were simply not aware of the conditions in the area and how to survive long term. This was a big problem because the reason why they moved there was because of searching for new opportunities and by not surviving this wouldn't have happened, while the government had its goal on long term settlements through which it will increase its influence in the region.
The reason why the colonists, referred to as Pilgrims, survived were the members of the native Americans, namely the Wampanoag. The Wampanoag were friendly and they explained to the colonists what they can expect climate-wise, thought them about the characteristics of the land, introduced them to local crops and how to grow them so that they can feed themselves. This led to good and friendly relations between the two groups and the colonists survived and managed to remain in the area.
Answer:
In a divergent plate boundary, two plates move away from one another. Due to this divergent movement of plates, seafloor spreading takes place in the ocean basin along the mid-oceanic ridge and rifting take place in the continental areas. Due to the stretching of the crust, the lithosphere becomes thin, and with more progressive spreading, it results in the eruption of magma at the seafloor. This magma is basaltic in nature, that reaches the surface due to the force exerted by the uprising magma forming convection cells in the mantle. This type of plate motion results in the expansion of the ocean basin and the rift valley in the continental areas forms seas and oceans with increasing time.
The rocks that are formed at the mid-oceanic ridge are the youngest as the magma cools and solidifies very rapidly here. With further moving away from this spreading center the age of the rocks increases.
The divergent plate boundaries are also responsible for the occurrence of deep-focus earthquakes, and it also leads to the formation of volcanoes in its adjacent sides.
Explanation:
long term and lasting progress
