Environmental Science Quiz

True/False Questions

• The ocean is a carbon sink. True.
• Agricultural fields can contaminate water and are typically classified as a point source of pollution. True.
• The Nitrogen cycle is an example of how energy flows in the environment. False.
• Water stress can never occur in places where freshwater sources (such as rivers, lakes) are abundant. False.
• Ecosystems change naturally over time. True.

Matching Terms and Definitions

• Organism: An individual living being.
• Ecosystem: All the communities in an area, all the non-living components in the environment, and their interactions.
• Biome: Group of ecosystems with the same climate and similar communities.

Multiple Choice Questions

• Question 7: In the food chain (Grass → Grasshopper → Frog → Python → Eagle), the arrow represents the flow of energy.
• Question 8: Biotic factors (living components) include sunflower and bacteria.
• Question 9: If a chemical in a whale's body increases over time, the chemical is bioaccumulating.
• Question 10: Wastes rich in organic constituents, nitrogen-containing wastes, and phosphorus-containing wastes can cause a decrease in oxygen levels in water systems. Photosynthesis by phytoplankton does not decrease oxygen levels.
• Question 11: Water usage can be categorized into domestic and agricultural. (True/False).
• Question 12: Humans affect the carbon cycle by burning fossil fuels, deforestation, and improper farming activities that alter soil composition.
• Question 13: In the food chain (Grass → Grasshopper → Frog → Python → Eagle), the python occupies the tertiary consumer trophic level.
• Question 14: Important processes in the hydrological cycle include evaporation and condensation.
• Question 15: In the food chain (Grass → Grasshopper → Frog → Python → Eagle), the grasshopper is the primary consumer.
• Question 1: The most abundant gas in the air is Nitrogen.
• Question 2: Global warming may result in floods, cyclones, and a decline in food productivity. (Multiple choice).
• Question 3: pH 5 is more acidic than pH 8 (True/False).
• Question 4: Microorganisms are not helpful in drinking water treatment. (True/False).
• Question 5: Gravity in a sedimentation tank helps in separating suspended solids. (True/False).
• Question 6: Ground level ozone is not a particulate pollutant. (Multiple choice question).
• Question 7: Reverse osmosis is a method to remove salts from seawater.
• Question 8: NO2 and SO2 are the primary contributors to acid rain.
• Question 9: VOCs stand for Volatile Organic Compounds.
• Question 11: Photochemical smog is caused by VOCs and NOx in the presence of sunlight, it leads to eye irritation, and it's a mixture of compounds.
• Question 12: The greenhouse effect is caused by several gases (nitrous oxide, methane, carbon monoxide, and chlorofluorocarbons), not only carbon dioxide.
• Question 13: Secondary treatment in water treatment plants removes organic matter.
• Question 14: You can manage noise pollution by reducing noise at the source, providing hearing protection, and increasing greenery.
• Question 1: The change in population over time is represented by the growth rate.
• Question 2: Geothermal power plants generate electricity by injecting water underground, which turns to steam and rises up to turn turbines.
• Question 3: "Global hectares per person" is a measure of ecological footprint.
• Question 4: There are 17 Sustainable Development Goals (SDGs) established by the UN.
• Question 5: Biomass accounts for the largest share of renewable energy consumption.
• Question 6: Natural gas is a non-renewable energy source. (True/False).
• Question 7: Green buildings generally have a lower negative impact on human health. (True/False).
• Question 8: Coal use results in loss of landscape biodiversity, release of acid mine drainage, and air pollution.
• Question 9: Disadvantages of wind energy include inconsistent energy production, potential harm to wildlife, and not being consistently profitable for smaller scale use.
• Question 10: LEED stands for Leadership in Energy and Environmental Design.
• Question 11: The source of nuclear power is Uranium.
• Question 12: Petroleum is an example of a liquid fossil fuel.
• Question 13: Animal waste can be used to produce energy. (True/False).
• Question 14: LCA (Life Cycle Assessment) considers solid waste generation, solid waste disposal, air pollution, and global warming potential.
• Question 15: Population distribution across the planet is not uniform. (True/False).

Treatment Steps in a DWTP (Water Treatment Plant)

The provided information shows a suggested order of treatment steps in a water treatment plant:

• Addition of coagulants: This is step 1.
• Flocculation: This is step 2.
• Sedimentation: This is step 3.
• Filtration: This is step 4.
• Disinfection: This is step 5.
• Distribution to end users: This is step 6.