Question

Describe the following spheres of the Earth.

1. Geosphere
2. Biosphere
3. Atmosphere
4. Hydrosphere​

Answer 1

Step-by-step explanation:

1. Geosphere

Geo means “earth.” The Earth’s geosphere (sometimes called the lithosphere) is the portion of the earth that includes rocks and minerals. It starts at the ground and extends all the way down to Earth’s core.

We rely on the geosphere to provide natural resources and a place to grow food. Volcanos, mountain ranges, and deserts are all part of the geosphere.

2. Biosphere

Bio means “life.” The biosphere is made up of all the living things on Earth and it includes fish, birds, plants, and even people.

The living portion of the Earth interacts with all the other spheres. Living things need water (hydrosphere), chemicals from the atmosphere, and nutrients gained by eating things in the biosphere.

3. Atmosphere

Atmos means “air.” The atmosphere includes all the gases surrounding the Earth. We often call the atmosphere “air.” All planets have an atmosphere, but Earth is the only planet with the correct combination of gases to support life.

The atmosphere consists of five layers and is responsible for Earth’s weather. Even though it seems like air is made of nothing, it consists of particles too small to be seen. All these particles have weight that push down on Earth. The weight of air above us is called air pressure.

4. Hydrosphere

Hydro means “water.“ The hydrosphere includes the oceans, rivers, lakes, groundwater, and water frozen in glaciers. 97% of water on Earth is found in the oceans. Water is one of the most important substances needed for life and makes up about 90% of living things. Without water, life would not be possible.

Answer 2

1. The geosphere is the earth itself: the rocks, minerals, and landforms of the surface and interior.
2. Organisms help form and weather rocks. Organisms in the ocean provide the material that form carbonate rocks at the bottom of the ocean. The roots of plants break up rocks to increase their weathering rates.
3. Dissolved gases from the Atmosphere affect the chemistry of the Geosphere. For example, carbon dioxide dissolved in rainwater produces a weak acid that weathers rock at Earth's surface.
4. Water, the universal solvent, is a key agent of change causing chemical and mechanical erosion of the Earth's Geosphere. Eroded materials move down the watershed as water makes its way to the ocean.

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