Class 7 Exam > Class 7 Notes > Social Studies (SST) Class 7 > Worksheet: Inside Our Earth
Inside Our Earth Class 7 Worksheet Geography Chapter 2
Q.1. What is the radius of earth?
Q.2. What are the three layers of the earth?
Q.3. What are the main mineral constituents of the continental mass?
Q.4. What are metamorphic rocks?
Q.5. Write about the deepest mine in the world.
Q.6. What happens to igneous and sedimentary rocks when they are subjected to great heat and pressure?
Q.7. What are the uses of rocks?
Q.8. Sedimentary rocks are formed from sediments. Give reason.
Q.9. Write a note on various types of rocks?
Q.10. What are igneous rocks?
Q.11. Limestone is changed into marble. Give reason?
Q.12. What do you mean by a rock cycle?
Q.13. What is the core of the earth made up of?
Q.14. Name the monument which is made of red sandstone?
Q.15. What is the Latin word for igneous?
You can find Worksheets Solutions here: Worksheet Solutions: Inside Our Earth
The document Inside Our Earth Class 7 Worksheet Geography Chapter 2 is a part of the Class 7 Course Social Studies (SST) Class 7.
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FAQs on Inside Our Earth Class 7 Worksheet Geography Chapter 2
| 1. What are the layers of the Earth? |  |
Ans. The Earth is composed of three main layers - the crust, the mantle, and the core. The crust is the outermost layer and is made up of solid rock. The mantle lies beneath the crust and is mostly solid but has some areas of molten rock. The core is the innermost layer and is divided into the outer core, which is liquid, and the inner core, which is solid.
| 2. How do scientists study the Earth's interior? | |
Ans. Scientists study the Earth's interior using various methods. One common method is through seismic waves generated by earthquakes. These waves travel through the Earth's layers and can be detected and analyzed by seismographs. By measuring the time it takes for seismic waves to travel through different materials, scientists can infer the composition and structure of the Earth's interior.
| 3. What causes earthquakes and volcanic eruptions? | |
Ans. Earthquakes and volcanic eruptions are caused by the movement of tectonic plates, which are large pieces of the Earth's crust that fit together like a puzzle. When these plates collide, separate, or slide past each other, it can create enormous amounts of energy. This energy is released as earthquakes or volcanic eruptions. Earthquakes occur when the energy is released suddenly along faults, while volcanic eruptions happen when molten rock called magma rises to the surface.
| 4. How does the Earth's magnetic field work? | |
Ans. The Earth's magnetic field is generated by the movement of molten iron and nickel in its outer core. This movement creates electric currents, which in turn produce a magnetic field. The Earth's magnetic field acts like a giant magnet, with a north pole and a south pole. It helps protect the Earth from harmful solar radiation and plays a crucial role in navigation, as compasses align with the magnetic field lines.
| 5. What is the significance of plate tectonics? | |
Ans. Plate tectonics is the theory that explains the movement of the Earth's tectonic plates. This theory has revolutionized our understanding of the Earth's geology and has many significant implications. Plate tectonics helps explain the formation of mountains, the occurrence of earthquakes and volcanic activity, the distribution of continents, and the creation of oceanic features such as trenches and ridges. It also plays a role in the Earth's climate system and the long-term evolution of the planet.
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Nov 23, 2024 Last updated |
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