The Four Spheres of Earth and Their Interconnections

The video tutorial explores the concept of ecosystems, emphasizing the interdependence of Earth's four major spheres: lithosphere, biosphere, hydrosphere, and atmosphere. It explains how these spheres interact, leading to natural and man-made events that cause changes within the ecosystem. The tutorial delves into the structure of the lithosphere, detailing Earth's layers and the composition of oceanic and continental crusts, highlighting their differences in density and rock types.

What is the term used to describe a collection of interdependent parts within a defined boundary?

• Ecosystem

• Biosphere

• System

• Atmosphere

Which sphere of Earth is described as the rigid outermost shell?

• Atmosphere

• Lithosphere

• Hydrosphere

• Biosphere

What are the layers beneath the lithosphere?

• Atmosphere, Hydrosphere, Biosphere

• Crust, Mantle, Core

• Continental Crust, Oceanic Crust, Mantle

• Tectonic Plates, Soil, Rocks

Why do tectonic plates float on the mantle?

• Because they have lower density and are solid

• Because they are in a liquid state

• Because they are made of water

• Because they are denser than the mantle

What is the process called where the lithosphere interacts with other spheres to form soil?

• All of the above

• Soil Liquefaction

• Erosion

• Weathering

Which crust is denser, oceanic or continental?

• Continental

• Neither, they are both liquid

• Both have the same density

• Oceanic

What is the main composition of the oceanic crust?

• Limestone

• Granite

• Sandstone

• Basalt

Which type of crust is thicker?

• Oceanic

• Continental

• Neither, they are both thin

• Both are the same thickness

What types of rocks are found in the Earth's crust?

• Quartz, Feldspar, Mica

• Sandstone, Shale, Marble

• Basalt, Granite, Limestone

• Igneous, Metamorphic, Sedimentary

What is the primary rock composition of the continental crust?

• Basalt

• Granite

• Sandstone

• Limestone