Podcast
Questions and Answers
What is the main source of magma in the Earth's interior?
What is the main source of magma in the Earth's interior?
- Asthenosphere (correct)
- Crust
- Mantle
- Moho's discontinuity
Which part of the Earth is known to be brittle in nature?
Which part of the Earth is known to be brittle in nature?
- Crust (correct)
- Mantle
- Asthenosphere
- Moho's discontinuity
What is the average thickness of the oceanic crust?
What is the average thickness of the oceanic crust?
- 80 km
- 30 km
- 70 km
- 5 km (correct)
Which region has a continental crust that can be as thick as 70 km?
Which region has a continental crust that can be as thick as 70 km?
Why is the gravitation force (g) greater near the poles compared to the equator?
Why is the gravitation force (g) greater near the poles compared to the equator?
What is the weak zone within the mantle called?
What is the weak zone within the mantle called?
What term is used to describe the difference between observed gravity readings and expected values?
What term is used to describe the difference between observed gravity readings and expected values?
How do magnetic surveys help understand the distribution of materials in the crustal portion?
How do magnetic surveys help understand the distribution of materials in the crustal portion?
From where to where does the mantle extend in the Earth's interior?
From where to where does the mantle extend in the Earth's interior?
What causes an earthquake to occur according to the text?
What causes an earthquake to occur according to the text?
Why are seismic waves crucial for understanding the interior of the earth?
Why are seismic waves crucial for understanding the interior of the earth?
How does the uneven distribution of mass within the earth influence gravity values?
How does the uneven distribution of mass within the earth influence gravity values?
What is the material in the upper mantle portion called before it reaches the surface?
What is the material in the upper mantle portion called before it reaches the surface?
Which of the following is NOT included in the materials that reach the ground during volcanic eruptions?
Which of the following is NOT included in the materials that reach the ground during volcanic eruptions?
What is the classification basis used for categorizing volcanoes?
What is the classification basis used for categorizing volcanoes?
Which type of volcano is considered the largest on Earth, except for basalt flows?
Which type of volcano is considered the largest on Earth, except for basalt flows?
At what depth is the core-mantle boundary located?
At what depth is the core-mantle boundary located?
Which element primarily constitutes the core of the Earth?
Which element primarily constitutes the core of the Earth?
What is the main source of information about the earth's interior discussed in the text?
What is the main source of information about the earth's interior discussed in the text?
Why is it not possible to drill beyond 3 - 4 km in gold mines in South Africa?
Why is it not possible to drill beyond 3 - 4 km in gold mines in South Africa?
What kind of materials have scientists analyzed to gain knowledge about the earth's interior?
What kind of materials have scientists analyzed to gain knowledge about the earth's interior?
What are the two major drilling projects mentioned in the text for exploring the earth's crustal portions?
What are the two major drilling projects mentioned in the text for exploring the earth's crustal portions?
What is the deepest depth reached by a drill according to the text?
What is the deepest depth reached by a drill according to the text?
Why is most of our knowledge about the earth's interior based on estimates and inferences?
Why is most of our knowledge about the earth's interior based on estimates and inferences?
What type of intrusive body is a batholith?
What type of intrusive body is a batholith?
How are lacoliths different from batholiths?
How are lacoliths different from batholiths?
Which of the following intrusive bodies is formed concave to the sky and is known as lapolith?
Which of the following intrusive bodies is formed concave to the sky and is known as lapolith?
What is the characteristic feature of a lacolith?
What is the characteristic feature of a lacolith?
Where are wavy masses of intrusive rocks sometimes found according to the text?
Where are wavy masses of intrusive rocks sometimes found according to the text?
Which type of intrusive body can be considered as the localised source of lava that finds its way to the surface?
Which type of intrusive body can be considered as the localised source of lava that finds its way to the surface?
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