MCQ Test: Layers Of The Earth! Quiz

Explanation
The diagram shows multiple layers, labeled A, B, C, and D. The question asks to identify the crust on the diagram. Since the answer is Layer A, it can be inferred that Layer A represents the crust.

Explanation
Layer B is the mantle because it is located between the crust (Layer A) and the core (Layer D). The mantle is a thick layer of hot, solid rock that surrounds the Earth's core. It is responsible for convection currents that drive plate tectonics and volcanic activity.

Explanation
The inner core can be identified as Layer D because it is the deepest layer in the diagram. It is located at the center of the Earth and is composed of solid iron and nickel. The other layers, A, B, and C, are outer layers and are not as deep as the inner core.

Explanation
The crust is the outermost layer of the Earth's surface, where we live. It is the thinnest layer, ranging from 5 to 70 kilometers in thickness. The crust is made up of solid rocks and is divided into two types: continental crust and oceanic crust. The continental crust is found beneath the continents, while the oceanic crust is located beneath the ocean floor. The crust is where all the landforms, such as mountains, valleys, and plains, are formed, and it is also where all life on Earth exists.

Explanation
The inner core is made of solid metal because of the intense pressure of the other layers beating down on it. This pressure causes the metal to remain in a solid state, despite the high temperatures. The weight of the crust is not the main factor in keeping the core solid, as it is the pressure from the other layers that is responsible for this. The core does not turn from solid to liquid due to its high temperature. Therefore, the correct answer is that the intense pressure of the other layers is what keeps the inner core solid.

Explanation
The crust is the outermost layer of the Earth's surface. It is divided into continental crust and oceanic crust. The continental crust forms the landmasses and contains the highest mountains, such as the Himalayas and the Rockies. The oceanic crust, on the other hand, is found beneath the oceans and contains the deepest parts of the Earth, such as the Mariana Trench. Therefore, the crust is the layer that contains both the highest mountains and the deepest oceans.

Explanation
The crust is the outermost layer of the Earth and is composed of solid rock. It is the layer that is directly exposed to the elements and can be affected by erosion and weathering. Erosion is the process of wearing away the Earth's surface through the action of wind, water, or ice, while weathering is the breaking down of rocks into smaller pieces by natural forces such as rain and wind. Therefore, the crust is the layer that can be worn down by erosion and weathering.

Explanation
Convection currents occur in the mantle (asthenosphere). The mantle is a layer of the Earth located between the crust and the outer core. It is composed of solid rock that can flow slowly over long periods of time. Convection currents are caused by the heat generated from the core of the Earth. This heat causes the rock in the mantle to become less dense and rise upward, while cooler, denser rock sinks downward. This movement of material creates convection currents, which play a significant role in plate tectonics and the movement of Earth's lithospheric plates.

Explanation
The crust is the correct answer because it is the solid and outermost layer of the Earth's surface. It is composed of tectonic plates, which are large sections of the Earth's crust that fit together like a puzzle. These plates are constantly moving and interacting with each other, causing geological activity such as earthquakes and the formation of mountains.