Question

Scenario 1: Agricultural Irrigation and Fertilizers

A farming region begins using advanced irrigation systems and chemical fertilizers to increase crop production. Farmers are able to grow more food and support a growing population. However, over time scientists notice that nearby lakes and rivers are turning green due to large algae blooms. Fish populations begin to decline because the algae reduce oxygen levels in the water. Local residents also report changes in water quality. Researchers suspect that fertilizer runoff from farms is entering the waterways after rainfall and irrigation.

Question:
What argument can you make about the ecological effects of agricultural fertilizers on aquatic ecosystems?

Claim:
Write a clear statement explaining your argument.

Is like a 50/50 benefit it protect plants, fruits, or Vegetables from the insect that wants to eat it, in the other hand is bad for our environment because of the runoff that cause deaths for fish and other life in the ocean, river, and lakes





Evidence:
Use at least two pieces of evidence from the scenario to support your claim.





Reasoning:
Explain how the evidence supports your claim and connect it to what you know about ecosystems and nutrient pollution.





Scenario 2: Industrial Factory Expansion

A manufacturing company builds a large factory near a small town. The factory produces building materials and creates many jobs for the community. The production process requires burning fossil fuels to power machines and generate heat. After several years, residents begin noticing thicker smog in the air and a layer of dust settling on nearby plants and buildings. Environmental scientists studying the area also report that some nearby trees show signs of stress and slower growth compared to trees farther away from the factory.

Question:
What claim can you make about how industrial activity affects air quality and plant life?

Claim:
State your argument about the impact of industrial activity.





Evidence:
Provide two pieces of evidence from the scenario that support your claim.





Reasoning:
Explain why the evidence supports your claim and how pollution can affect plants and ecosystems.





Scenario 3: Pesticide Use in Agriculture

Farmers in large agricultural regions begin using a new pesticide that protects crops from insects that previously damaged harvests. Crop yields increase significantly, helping farmers earn more income and supply more food to markets. However, after several growing seasons, researchers begin noticing a decline in local bee populations. Bees are important pollinators for many plants and crops. Scientists suspect that exposure to pesticides may be harming bees when they collect nectar or pollen from treated plants.

Question:
What argument could you make about the ecological impact of pesticides on pollinators?

Claim:
Write a statement describing your argument.





Evidence:
Identify two pieces of evidence from the scenario that support your claim.





Reasoning:
Explain how the evidence connects to the importance of pollinators in ecosystems.




Reasoning:
Explain how the evidence supports your claim about biodiversity and ecosystem stability.







Scenario 8: Medical Advances and Population Growth

Medical innovations such as vaccines, antibiotics, and improved healthcare have helped people live longer and healthier lives. As a result, the global human population has increased significantly over the past century. With more people needing food, water, housing, and energy, more land is being developed for farms, cities, and infrastructure. Forests and natural habitats in some areas are being cleared to make room for these developments. Environmental scientists are studying how increased human demand for resources may affect ecosystems and biodiversity around the world.

Answer 1

Scenario 1 — Agricultural Irrigation and Fertilizers
- Claim:
- While chemical fertilizers and improved irrigation increase crop production, they can cause nutrient runoff that leads to eutrophication of nearby lakes and rivers, harming aquatic life and water quality.
- Evidence:
1. Farmers using advanced irrigation and chemical fertilizers are able to grow more food and support a growing population.
2. Nearby lakes and rivers are turning green from large algae blooms, fish populations are declining (oxygen reduction), and researchers suspect fertilizer runoff after rainfall and irrigation.
- Reasoning:
- Fertilizers contain nutrients (especially nitrogen and phosphorus). When excess nutrients wash off fields into waterways after rainfall or from irrigation, they fuel rapid algae growth (algal blooms). When those algae die and decompose, microbes consume dissolved oxygen in the water, causing hypoxic conditions that kill or stress fish and other aquatic organisms. Reduced water quality also affects human uses (drinking, recreation). Thus the initial agricultural benefit (higher yields) is directly linked to downstream ecological harm through nutrient pollution and disruption of aquatic ecosystems.

Scenario 2 — Industrial Factory Expansion
- Claim:
- Industrial activity that burns fossil fuels can degrade air quality (smog and dust) and harm nearby plant life, causing stress and reduced growth.
- Evidence:
1. The factory’s production requires burning fossil fuels to power machines and generate heat.
2. Residents observe thicker smog and dust settling on plants/buildings; scientists report nearby trees showing stress and slower growth than trees farther away.
- Reasoning:
- Burning fossil fuels releases pollutants (particulate matter, sulfur and nitrogen compounds, ozone precursors) that form smog and deposit particles and acidic compounds on leaves and soil. Dust and particulates block light, clog stomata, and reduce photosynthesis; acidifying pollutants and ozone can damage leaf tissue and impair growth. These physiological stresses explain the observed slower growth and visible damage in trees near the factory, and they can cascade to broader ecosystem impacts (reduced carbon uptake, altered species composition) and human health concerns.

Scenario 3 — Pesticide Use in Agriculture
- Claim:
- New pesticide use can raise crop yields but may harm pollinators (like bees), threatening pollination services, biodiversity, and long‑term crop productivity.
- Evidence:
1. The pesticide protects crops from insects and increases crop yields and farmer income.
2. Researchers notice a decline in local bee populations and suspect pesticide exposure when bees collect nectar or pollen from treated plants.
- Reasoning (pollinators’ role):
- Bees and other pollinators transfer pollen between flowers, enabling reproduction for many wild plants and crops. If pesticides are toxic or cause sublethal effects (impaired navigation, reproduction, immune function), bee populations will decline, reducing pollination rates and harming plant reproduction and crop yields that depend on pollinators.
- Reasoning (biodiversity and ecosystem stability):
- Loss of pollinators reduces plant diversity and reproductive success, which can simplify communities and weaken food webs. Reduced biodiversity lowers ecosystem resilience to pests, disease, and environmental change, undermining long-term agricultural productivity and ecosystem services.

Scenario 8 — Medical Advances and Population Growth
- Claim:
- Medical advances that increase human lifespan and population can indirectly drive habitat loss and biodiversity decline because greater resource demand leads to more land conversion for food, housing, and infrastructure.
- Evidence:
1. Vaccines, antibiotics, and improved healthcare have helped people live longer and the global population has increased significantly.
2. More land is being developed for farms, cities, and infrastructure; forests and natural habitats are being cleared in some areas, and scientists are studying the effects on ecosystems and biodiversity.
- Reasoning:
- A larger human population increases demand for food, water, energy, and living space. To meet that demand, natural habitats are often converted to agriculture, urban areas, and roads, causing habitat loss and fragmentation. This reduces populations of native species, decreases biodiversity, and disrupts ecosystem services (carbon storage, water regulation, pollination). Over time these changes can degrade ecosystem health and resilience, creating trade-offs between human welfare gains from medical advances and long-term environmental sustainability.