Water Resources and Pollution Quiz

Concentrations of trace substances, such as pollutants in water or chemicals in soil, are commonly measured in parts per million (ppm) to express very small ratios.

A septic system is an on-site wastewater treatment system used in areas not connected to a central sewer system. It uses a tank to settle solids and a drain field to filter liquid waste.

A lock is a device used in canals and waterways with varying water levels to raise and lower ships between different water heights. Gates close to trap water, which is then pumped in or drained out.

Hatcheries are specialized facilities where fish eggs are artificially fertilized and hatched to raise young fish before releasing them into natural bodies of water for conservation or sport fishing.

Point-source pollution refers to contaminants that enter the environment from a single, identifiable location, such as a pipe or a specific industrial site. Nonpoint-source pollution, by contrast, comes from many diffuse sources like runoff.

Heavy rainfall leads to an excess of water that the ground cannot absorb, resulting in flooding. While hurricanes can cause heavy rain, flooding is the direct natural hazard resulting from the accumulation of that water.

A drought is a prolonged period of abnormally low rainfall, leading to a shortage of water. It is a significant climate-related event that impacts agriculture and water supplies.

The Three Gorges Dam is a massive hydroelectric gravity dam that spans the Yangtze River in China. It was constructed primarily to control flooding and generate electricity.

Desalination is the process of removing mineral components, specifically salt, from saline water. This is commonly used to produce fresh water from seawater for human consumption or irrigation.

Irrigation is the artificial application of water to land or soil to assist in the production of agricultural crops. It is essential for farming in dry regions.

Concentration refers to the amount of a substance (in this case, salt) per unit volume of a solution (the ocean water). Over time, evaporation has concentrated the salts in the ocean.

Irrigation is the method of providing water to crops to help them grow in areas where rainfall is insufficient. It is a fundamental practice in modern agriculture.

Pollution is defined as the presence or introduction into the environment of a substance or thing that has harmful or poisonous effects. It is an unwanted change caused by human or natural activity.

An aquifer is an underground layer of water-bearing permeable rock, gravel, sand, or silt from which groundwater can be extracted using a water well.

Aquaculture is the farming of aquatic organisms such as fish, crustaceans, mollusks, and aquatic plants. It involves cultivating these populations under controlled conditions.

While natural events can cause minor pollution, the vast majority of water pollution results from human activities such as industrial discharge, agricultural runoff, and improper waste disposal.

The EPA is the Environmental Protection Agency, a United States federal government agency whose mission is to protect human and environmental health.

Pollution is caused by a wide variety of human activities, including burning fossil fuels, vehicle emissions, and industrial manufacturing processes. Therefore, all the listed options contribute to pollution.

Water conservation involves reducing the usage of water and recycling waste water for different purposes. Taking shorter showers is a direct way to reduce water consumption.

The Environmental Protection Agency (EPA) is specifically tasked with protecting human health and the environment by writing and enforcing regulations based on laws passed by Congress.

Dams are built across rivers to block water flow, creating reservoirs (large artificial lakes) that store fresh water for human use, irrigation, and power generation.

Nonpoint-source pollution comes from many diffuse sources, such as rainfall or snowmelt moving over the ground and picking up pollutants, making it difficult to trace to a single origin.

Sewage is the term for wastewater and excrement conveyed in sewers. It includes the water and waste from household sinks, toilets, and showers.

When a dam is built, the water that is blocked accumulates behind the dam, which causes the area upstream to become flooded, creating a reservoir.