Groundwater becomes polluted when toxins or pollutants are emitted into the ground, or surface water that then leeches through soil and enters the groundwater. Groundwater is often located beneath the earth at varying depths, but when pollutants or toxins pass through the earth to reach these groundwater sources they then often become polluted. There are also processes such as mining for minerals, oil, or natural gas where chemicals or the resources themselves are released into the groundwater through the extraction process that then thereby pollute the groundwater.
The type of roch that makes up the andes mountains in south america are called igneous rocks
1. Moon
tides or lunar tides are caused by the pull of gravity between the moon and
earth. The moon will exert a gravitational pull on earth and the earth also
pulls the moon towards itself. The results is that the moon is near the earth and
formation of oceans tide. Even though the earth can hold any object within its
proximity, the ocean is partly attracted due to its liquid property. At night,
the ocean tends to be attracted to the moon by creating a bulge and assigning
it as ‘high tide’. This is due to the strong gravitational pull of the moon to
the earth.
2. The
gravitational pull of the earth differs in different locations.
3. Images
from space