Test 3: Air and Water Quality, Human Impacts and Environmental Legislation - CRISTINA SUBT | Laabri

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Select all the main sources of water pollution from the choices below.

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In each of the following scenarios, there is a source of contamination. Sort each as either a point source or nonpoint source.

A large oil tanker accidentally spills thousands of gallons of crude oil into the ocean, creating a slick that spreads over miles of coastline.
Heavy rainfall washes fertilizers and pesticides from a farm field into a nearby stream, causing algal blooms and fish kills.
A chemical factory releases untreated wastewater directly into a nearby river, resulting in elevated levels of toxins downstream.
Rainwater flows over impermeable surfaces like roads and parking lots, picking up pollutants such as motor oil, litter, and pet waste before draining into nearby creeks.
A gas station's underground fuel storage tank develops a leak, allowing gasoline to seep into the soil and contaminate groundwater in the vicinity.

Point source
Nonpoint source

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Benthic macroinvertebrates are a useful tool in identifying water quality because different species have different abilities to adapt to changing water quality. In other words, intolerant species will generally be found in less contaminated locations due to their inability to adapt to contaminated water. Below is a map of Aquaville showing the path of a fictional James River and potential contamination sources. If the water of James River generally flows southbound, which site on this map would you expect to have the most tolerant macroinvertebrate species?

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Match each of the following water borne illnesses to their appropriate descriptions.

Draggable item		Corresponding Item
Cholera		A bacterial infection causing severe diarrhea and dehydration, often transmitted through contaminated water sources in developing countries.
Hepatitis A		A parasitic infection causing gastrointestinal symptoms such as diarrhea, abdominal cramps, and nausea, often contracted from contaminated water sources in wilderness areas or developing countries.
E. coli infection		A protozoan infection causing gastrointestinal symptoms such as diarrhea, abdominal cramps, and fever, commonly found in recreational water sources such as swimming pools and lakes.
Cryptosporidiosis		A viral infection causing inflammation of the liver, transmitted through fecal-oral contamination of water or food, leading to symptoms such as jaundice, fatigue, and nausea.
Giardiasis		A bacterial infection causing gastrointestinal symptoms such as diarrhea, abdominal cramps, and fever, commonly associated with contamination of water sources by human or animal feces.

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Which of the following best describes LD50?

The amount of a substance that causes 50% mortality in a population within a certain time period.

The recommended daily allowance of a nutrient for 50% of the population.

The lethal dosage of a substance for 50% of the population.

The concentration of a substance in the environment that poses a 50% risk of adverse effects on wildlife.

The maximum tolerated dose of a drug that produces no toxic effects in 50% of the population.

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Based on what you know about biomagnification, reorder the following images in order from lowest to highest concentrations of toxic substances.

large fish (e.g. tuna)
phytoplankton
seal
small fish (e.g. anchovies)
zooplankton
polar bear

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Label each of the following Hazardous Waste Symbol with their appropriate meaning.

Mmuae Afoforo a Wobɛpaw:

health hazard

explosive

oxidizing

toxic

corrosive

compressed gas

environmentally damaging

flammable

irritant

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Match each type of hazardous waste to its definition

Draggable item		Corresponding Item
Toxic waste		Waste generated from healthcare facilities, such as hospitals and clinics, containing infectious or potentially infectious materials.
Biomedical waste		Waste resulting from the use, handling, or disposal of chemicals, including solvents, pesticides, and laboratory reagents.
Radioactive waste		Waste containing substances that are harmful or fatal when ingested, inhaled, or absorbed through the skin, posing health risks to humans and ecosystems.
Chemical waste		Waste generated from the production, use, or disposal of electronic devices and equipment, such as computers, televisions, and cell phones.
E-waste		Waste containing radioactive materials, such as spent nuclear fuel, nuclear reactor components, or radioactive medical equipment.

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What is the main purpose of the Clean Air Act?

To regulate emissions of greenhouse gases to mitigate climate change.

To protect and improve air quality by regulating emissions of air pollutants from stationary and mobile sources.

To reduce water pollution and protect aquatic ecosystems.

To promote the use of renewable energy sources such as wind and solar power.

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Draggable item		Corresponding Item
National Environmental Policy Act (NEPA)		A United States federal law enacted to protect and improve water quality by regulating pollutant discharge into water bodies and setting water quality standards.
Endangered Species Act (ESA)		An international treaty aimed at phasing out the production and consumption of ozone-depleting substances (ODSs) to protect the ozone layer.
Kyoto Protocol		A United States federal law designed to protect endangered and threatened species and their habitats.
Clean Water Act (CWA)		An international treaty under the United Nations Framework Convention on Climate Change (UNFCCC) aimed at reducing greenhouse gas emissions to combat climate change.
Montreal Protocol		A United States federal law that establishes the basic structure for environmental impact assessments of federal government actions.

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Select all of the following options that represent renewable resources:

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Groundwater refers to the water found beneath the Earth's surface in soil pore spaces and in the fractures of rock formations. It originates from precipitation that infiltrates the soil and percolates downward until it reaches the water table, where it fills the spaces between grains of soil and rock. Groundwater is distinct from surface water sources such as rivers and lakes because it is located underground and often moves slowly through subsurface aquifers. Based on this information, identify potential sources of contamination groundwater might have due to its location.

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What is the difference between bioaccumulation and biomagnification?

Biomagnification occurs when toxins are stored in the tissues of individual organisms, while bioaccumulation refers to the increase in toxin concentration as it moves up the food chain.

Both bioaccumulation and biomagnification refer to the increase in toxin concentration as it moves up the food chain, with no difference between the two terms.

Bioaccumulation refers to the increase in toxin concentration as it moves up the food chain, while biomagnification occurs when toxins are released into the environment.

Bioaccumulation occurs when toxins are stored in the tissues of individual organisms, while biomagnification refers to the increase in toxin concentration as it moves up the food chain.