What is the definition of biosphere? (1 point)
the area of the earth that is solid
the area of the earth that is liquid
the area of the earth where all living
things exist
the area of the earth covered by water
The definition of biosphere is the area of the earth where all living things exist.
The correct definition of biosphere is: the area of the earth where all living things exist.
The correct definition of biosphere is: the area of the earth where all living things exist. To arrive at this answer, we can eliminate the other options first.
1. "The area of the earth that is solid": This option refers to the lithosphere, which is the solid outer layer of the earth. It doesn't encompass all living things, so it is not the correct definition of biosphere.
2. "The area of the earth that is liquid": This option could refer to the hydrosphere, which includes all the earth's water bodies. Similar to the first option, it doesn't encompass all living things, so it is not the correct definition of biosphere.
3. "The area of the earth where all living things exist": This option correctly defines the biosphere as the portion of the earth that contains living organisms such as plants, animals, and microorganisms. It includes the atmosphere (air), hydrosphere (water bodies), and lithosphere (land), where life exists.
4. "The area of the earth covered by water": This option specifically refers to the hydrosphere, which includes oceans, seas, lakes, and other bodies of water. While the hydrosphere is part of the biosphere, it is not the entirety of it. Therefore, this option is not the correct definition of biosphere.
Hence, the correct definition of biosphere is "the area of the earth where all living things exist."