Earth's Spheres and Processes

The video tutorial explores Earth's four spheres: lithosphere, atmosphere, hydrosphere, and biosphere. It explains the composition and processes within each sphere, such as the rock cycle, atmospheric layers, water cycle, and ecosystems. The tutorial highlights the interdependence of these spheres and the impact of human activities like pollution and erosion. It concludes with a call to action for preserving Earth's systems.

Which of the following is NOT one of Earth's four spheres?

• Hydrosphere

• Astrosphere

• Atmosphere

• Lithosphere

What is the primary component of the lithosphere?

• Gases

• Living organisms

• Water

• Rocks

Which type of rock is formed from cooled lava?

• Sedimentary rock

• Igneous rock

• Metamorphic rock

• Basalt rock

What percentage of the atmosphere is made up of nitrogen?

• 78%

• 21%

• 1%

• 50%

In which layer of the atmosphere do most weather events occur?

• Stratosphere

• Mesosphere

• Troposphere

• Exosphere

What percentage of Earth's surface is covered by water?

• 90%

• 71%

• 50%

• 29%

Which process describes the movement of water from the surface to the atmosphere and back?

• Rock cycle

• Nitrogen cycle

• Water cycle

• Carbon cycle

What does the biosphere primarily consist of?

• Rocks

• Living organisms

• Water

• Gases

Which sphere provides the soil that plants need for growth?

• Atmosphere

• Hydrosphere

• Lithosphere

• Biosphere

What is a major threat to the hydrosphere caused by human activity?

• Deforestation

• Air pollution

• Soil erosion

• Water pollution