Endogenic Processes

How is magma formed?

• Magma is formed through movement of rocks and minerals.

• Magma is formed under the earth’s mantle through solar radiation.

• Magma is formed through heating and cooling of materials on the earth’s surface.

• Magma is formed under certain circumstances in special location deep in the crust or in the upper mantle of the Earth.

What happens after magma is formed?

I. Magma escapes by intrusion.

II. Magma escapes by extrusion.

III. Magma escapes to the bodies of water.

IV. Magma escapes through a magma chamber.

• I, II and III

• I, II and IV

• I, III and IV

• II, III and IV

How does decompression melting occurs?

• It occurs when the temperature is constant but the pressure increases.

• It occurs when the temperature is constant but the pressure decreases.

• It occurs when the temperature decreases directly proportional to pressure.

• It occurs when the temperature increases inversely proportional to pressure.

Which of the following statements is CORRECT?

• High viscous magma means higher temperature, more silica content, and less violent eruption.

• High viscous magma means higher temperature, less silica content, and more violent eruption.

• High viscous magma means lower temperature, less silica content, and less violent eruption.

• High viscous magma means lower temperature, more silica content, and more violent eruption.

Which set of elements are all present in magma?

• Silicon, Lithium, Iron, Manganese

• Oxygen, Silicon, Iron, Aluminum

• Nitrogen, Potassium, Calcium, Aluminum

• Iron, Calcium, Silicon, Lithium

What is the tendency of a magma with high silica content?

• It tends to be hotter.

• It tends to be less viscous.

• It tends to be more viscous.

• It tends to be less explosive.

Which of the following statements describe volcanism?

I. A geological phenomena that occurs on the surface of the earth

II. The motion takes place inside cracks that infiltrate the upper mantle

III. The process where magma infiltrates the crust but fails to make it to the surface

IV. A process correlated with the flow and transportation of igneous material towards the surface

• I, II and III

• I, II and IV

• I, III and IV

• II, III and IV

To which activity can you compare partial melting of mantle rocks?

• Butter and chocolate bars are heated together until they both melted.

• Chocolate bars with almond and pistachio nuts are heated until all the chocolates melted while the nuts remained solid.

• Vanilla ice cream was left to melt on the table.

• Ice cubes disappeared in a pitcher of orange juice.

Which of the following statements do not describe plutonism?

I. A geological phenomena that occurs on the surface of the earth

II. A motion that takes place inside cracks that infiltrate the upper mantle

III. A process where magma infiltrates the crust but fails to make it to the surface

IV. A process correlated with the flow and transportation of igneous material towards the surface

• I, II and III

• I, II and IV

• I, III and IV

• II, III and IV

At what temperature will magma turn entirely to liquid?

• More than 2000 degrees Celsius

• Between 1000 and 1200 degrees Celsius

• Between 800 to 1000 degrees Celsius

• More than 1300 degrees Celsius