#1
Which gas is primarily responsible for global warming?
Carbon dioxide
ExplanationCarbon dioxide is a major greenhouse gas, trapping heat in the Earth's atmosphere and contributing significantly to global warming.
#2
Which of the following is a renewable energy source?
Solar power
ExplanationSolar power is a renewable energy source that harnesses the sun's energy to generate electricity.
#3
What is the term used to describe the loss of water from plant leaves?
Transpiration
ExplanationTranspiration is the process by which water is lost from plant leaves, contributing to water circulation in ecosystems.
#4
Which of the following is NOT a greenhouse gas?
Oxygen
ExplanationOxygen is not a greenhouse gas; greenhouse gases trap heat in the Earth's atmosphere, and oxygen does not exhibit this property.
#5
What is the term used to describe the process by which plants convert sunlight into chemical energy?
Photosynthesis
ExplanationPhotosynthesis is the process by which plants convert sunlight into chemical energy for their growth and development.
#6
What is the main cause of deforestation worldwide?
Agricultural expansion
ExplanationAgricultural expansion, driven by the need for more farmland, is the primary cause of deforestation globally.
#7
What is the term used to describe the variety of life on Earth?
Biodiversity
ExplanationBiodiversity refers to the variety of life on Earth, including the diversity of species, ecosystems, and genetic diversity.
#8
What is the primary function of wetlands in the ecosystem?
Filtering pollutants from water
ExplanationWetlands play a crucial role in filtering pollutants from water, improving water quality in ecosystems.
#9
Which of the following is a non-point source of water pollution?
Agricultural runoff
ExplanationAgricultural runoff, carrying pollutants from fields, is a non-point source of water pollution.
#10
What is the term used to describe the process of gradual soil degradation due to poor agricultural practices?
Soil erosion
ExplanationSoil erosion is the gradual degradation of soil due to factors like water and wind erosion, often exacerbated by poor agricultural practices.
#11
What is the term used to describe the process of converting waste materials into reusable materials?
Recycling
ExplanationRecycling is the process of converting waste materials into reusable materials to reduce environmental impact and promote sustainability.
#12
Which of the following is NOT a component of the ecological footprint?
Biodiversity footprint
ExplanationThe biodiversity footprint is not a component of the ecological footprint, which typically includes factors like carbon footprint and resource consumption.
#13
What is the main purpose of a marine protected area?
Preserving biodiversity
ExplanationMarine protected areas are established primarily to preserve and protect the biodiversity of marine ecosystems.
#14
Which of the following is a method of sustainable agriculture?
Integrated pest management
ExplanationIntegrated pest management is a sustainable agriculture practice that aims to control pests with minimal environmental impact.
#15
Which of the following pollutants is a primary contributor to smog?
Nitrogen dioxide
ExplanationNitrogen dioxide is a primary pollutant contributing to smog formation in the atmosphere.
#16
What is the main threat to coral reefs worldwide?
Climate change
ExplanationClimate change, with factors like rising sea temperatures and ocean acidification, poses a significant threat to coral reefs worldwide.
#17
Which of the following is a characteristic of an invasive species?
Outcompetes native species
ExplanationInvasive species often outcompete native species, causing ecological imbalances and biodiversity loss.
#18
Which of the following is a consequence of habitat fragmentation?
Isolation of populations
ExplanationHabitat fragmentation leads to the isolation of populations, reducing genetic diversity and increasing the vulnerability of species.
#19
Which of the following is NOT a consequence of soil erosion?
Increased fertility
ExplanationIncreased fertility is not a consequence of soil erosion; instead, erosion often leads to decreased soil fertility and productivity.
#20
What is the primary function of a riparian buffer zone?
Protecting water quality
ExplanationRiparian buffer zones play a crucial role in protecting water quality by filtering pollutants and preventing runoff from reaching water bodies.
#21
Which of the following is a greenhouse gas?
Methane
ExplanationMethane is a potent greenhouse gas that contributes to the trapping of heat in the Earth's atmosphere.
#22
Which international agreement aims to reduce greenhouse gas emissions to mitigate climate change?
Paris Agreement
ExplanationThe Paris Agreement is an international accord that aims to mitigate climate change by reducing greenhouse gas emissions.
#23
What is the term used to describe the maximum population size of a species that its environment can sustain indefinitely?
Carrying capacity
ExplanationCarrying capacity is the maximum population size that a species can sustain in its environment over the long term.
#24
Which of the following is a major cause of ocean acidification?
Industrial pollution
ExplanationIndustrial pollution, particularly emissions leading to increased carbon dioxide in the atmosphere, is a major cause of ocean acidification.
#25
What is the primary source of mercury pollution in aquatic ecosystems?
Coal combustion
ExplanationCoal combustion is a primary source of mercury pollution in aquatic ecosystems, posing risks to water quality and aquatic life.