Earth's Spheres Quiz

10 Questions

Which sphere of the Earth consists of all air on Earth?

Atmosphere

What is the sphere of the Earth that contains all living things?

Biosphere

Which sphere of the Earth is composed of all solid land in Earth's crust?

Geosphere

What is the sphere of the Earth that consists of all water on Earth?

Hydrosphere

Which sphere of the Earth does not contain any living organisms?

Atmosphere

Which layer of the atmosphere contains the ozone layer and prevents UV radiation?

Stratosphere

Which layer of the atmosphere is the coldest and thinnest?

Mesosphere

Which layer of the atmosphere forms clouds and is where weather occurs?

Troposphere

Which layer of the geosphere comprises Earth's solid and liquid rock from surface to inner core?

Mantle

Which sphere contains all water on Earth, in liquid, solid, and gaseous forms?

Hydrosphere

Study Notes

Atmosphere: Extends up to 10,000 km above Earth's surface, made up of nitrogen (78%), oxygen (21%), argon (0.9%), and other gases (0.1%). Contains five layers: troposphere, stratosphere, mesosphere, thermosphere, and exosphere.
Troposphere: Densest layer, close to Earth's surface; temperature decreases as altitude increases.
Stratosphere: Contains the ozone layer, preventing UV radiation. Temperature increases with altitude.
Biosphere: Includes all living organisms, from bacteria to blue whales. Dependent on other spheres (hydrosphere, atmosphere, geosphere) for survival.
Geosphere: Comprises Earth's solid and liquid rock from surface to inner core. Made up of four layers: inner core, outer core, mantle, and crust.
Hydrosphere: Contains all water on Earth, in liquid, solid, and gaseous forms. Over 97.5% is in oceans.
Interaction of spheres: Rains connect hydrosphere and atmosphere, humans and industries affect geosphere and biosphere.
Troposphere: Temperature decreases with altitude, forms clouds, and is where weather occurs.
Stratosphere: Contains the ozone layer at an altitude of 10-50 km. Temperature increases with altitude.
Mesosphere: Coldest and thinnest layer, between 50-85 km altitude. Temperature decreases with altitude.
Thermosphere: Ionosphere layer, starting at around 85 km altitude. Temperature increases with altitude, holds auroras.
Exosphere: Outermost layer, where gases escape into space. Extends over 1,000 km above the thermosphere.
Inner core: Small, extremely hot, dense, solid ball of iron and nickel at Earth's center.
Outer core: Flow of liquid iron generates Earth's magnetic field.
Mantle: Consolidated rock layer, holds about 84% of Earth's total volume.
Crust: Outermost solid layer, thickest under continents, thinnest under oceans.
Hydrosphere: Interacts with other spheres through bodies of water and water vapor.
Human impact: Industrialization, deforestation, and other human activities can harm the geosphere and biosphere.
Positive human impact: Creating bodies of water like reservoirs, building dams, and using renewable energy sources.