Tag: safety and first aid

Water cycle, carbon cycle and nitrogen cycle are essential to maintaining balance in an ecosystem. Water evaporates due to heating and gets converted into water vapour. The vapours cool down and return back to earth as rain.

Condensation is the process where water vapor cools and changes into liquid water droplets, forming clouds and eventually leading to precipitation.

Global warming is primarily driven by human activities such as burning fossil fuels and deforestation. Floods, earthquakes, and tornadoes are generally classified as natural disasters.

Deforestation reduces the land's ability to retain moisture, and pollution can disrupt local water cycles, both of which are significant contributors to the severity of droughts.

Both forest fires and fires in general can be caused by natural phenomena (like lightning) or human activity. The statement incorrectly categorizes them as exclusively one or the other.

Tributaries are smaller streams or rivers that flow into a larger main river or lake.

Lakes are typically fed by surface runoff, rivers, and underground springs that discharge water into the basin.

Rivers are formed by the convergence of smaller water channels, including rills, brooks, and streams, which gradually increase in volume.

An aquifer is an underground body of permeable rock, rock fractures, or unconsolidated materials (gravel, sand, or silt) from which groundwater can be usefully extracted using a water well. Since none of the specific choices like underground lake or river correctly define an aquifer, none of the above is correct.

71% of earth's surface is covered with water and 29% covered with land. This percentage of water is not only obvious sources of water like lakes, ponds, oceans but also the obvious sources of water like water in the air, frozen icecaps, glaciers, snow and underground water.