Give two examples of how the earth system’s four parts can interact with each other.

1) A classic example of an interaction between spheres is when a plant (part of the biosphere), takes carbon dioxide from the atmosphere and water (the hydrosphere) through its roots from underground (geosphere) to perform photosynthesis, which provides the plant with food and releases oxygen into the atmosphere.

2) When volcanoes (lithosphere) erupt. Dust and ash particles (lithosphere) spread through much of the atmosphere and block sunlight. Less sunshine can cause a cooler, drier climate in parts of the world. Cooler climate affects the biosphere by shortening the growing season.

the influence of charles louis de secondant , baton montesquieu.

regarding the law, the 15th amendment was specifically designed thinking in the rights of black free men.

even though ratified on february 3, 1870, the promise of the 15th amendment would not be fully applied for a long time.poll taxes and literacy tests would allow southern states disenfranchise african americans. only in 1965 the voting rights for african americans would be actually able to vote in the south.

in 1965, president johnson signed the voting rights act, which aimed to overcome legal barriers that prevented african americans from voting as it was guaranteed by the 15th amendment to the u.s. constitution.