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In which of Earth's spheres would we observe living organisms?

Question

In which of Earth's spheres would we observe living organisms?

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Solution

Living organisms can be observed in several of Earth's spheres:

  1. Biosphere: This is the main sphere where we find all living organisms. It extends from the bottom of the ocean to about six kilometers above sea level. It includes all ecosystems on Earth - forests, deserts, grasslands, lakes, rivers, oceans, and the atmosphere up to a certain height.

  2. Lithosphere: This is the solid outer part of Earth, including the crust and uppermost mantle. Here, we find organisms like bacteria, fungi, lichens, plants, and burrowing animals.

  3. Hydrosphere: This includes all the water present on Earth, such as oceans, seas, rivers, lakes, groundwater, and even water vapor in the atmosphere. It supports a wide variety of life forms, from microscopic organisms to the largest animals on Earth.

  4. Atmosphere: This is the layer of gases surrounding our planet. While it's not as densely populated as the other spheres

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troduction to Earth's Spheres - Interactive Activity

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