Which of the following layers is defined by its physical properties?(1 point)
Responses
asthenosphere
core
mantle
crust
crust
The layer that is defined by its physical properties is the asthenosphere.
The layer that is defined by its physical properties among the given options is the asthenosphere. To determine this, we need to understand the physical properties associated with each layer.
The asthenosphere is a part of the Earth's upper mantle. It is a semi-fluid layer composed of hot, malleable rock. This layer is located below the lithosphere, which includes the Earth's crust and the uppermost part of the mantle. The asthenosphere is characterized by its ability to flow and move due to high temperature and pressure, which makes it distinct from the more rigid lithosphere.
On the other hand, the core is the innermost layer of the Earth, located beneath the mantle. It is divided into two parts: the outer core and the inner core. The core is primarily composed of iron and nickel and is defined by its high density and extreme pressure.
The mantle, which surrounds the core, is the layer between the crust and the core. It is a solid, rocky layer primarily composed of silicate minerals. The mantle is known for its convective movement, where hot material rises and cool material sinks, contributing to the Earth's tectonic activity.
Lastly, the crust is the outermost layer of the Earth. It is composed of various types of rocks and is comparatively thin compared to the other layers. The crust is divided into two types – the continental crust, which forms the continents, and the oceanic crust, which lies beneath the oceans.
Based on the descriptions, it can be concluded that the asthenosphere is the layer defined by its physical properties. Its unique characteristic of being semi-fluid and malleable sets it apart from the other layers mentioned.