Life Sciences - Term 4 - Week 9

Human activities such as industrialization, urbanization, and agriculture have profound effects on ecosystems. Pollution from factories and vehicles contaminates air, water, and soil, leading to health issues for both humans and wildlife. Deforestation for agriculture and urban development destroys habitats, reducing biodiversity and disrupting food chains. Climate change, driven by greenhouse gas emissions, alters weather patterns and affects species distribution and survival.

In the Amazon rainforest, extensive logging and land clearing for agriculture have led to significant habitat loss. As trees are removed, the ecosystem's ability to absorb carbon dioxide decreases, contributing to climate change. Additionally, many species that depend on the forest for survival face extinction. This case illustrates the interconnectedness of human actions and ecological health.

Students will work in groups to identify a local ecosystem and discuss the human activities that impact it. Each group will create a list of at least three activities and their effects on the ecosystem. They will then present their findings to the class, highlighting the importance of conservation efforts and potential solutions to mitigate these impacts.

For independent practice, students will select a specific human activity (e.g., plastic pollution, urban sprawl, or overfishing) and conduct research on its effects on a chosen ecosystem. They will write a report summarizing their findings and propose at least two solutions to reduce the negative impacts of this activity. Reports will be shared in a future class.

• Increased biodiversity
• Habitat loss
• Improved air quality
• Enhanced soil fertility

Answer: Habitat loss

Deforestation leads to the destruction of habitats, which can result in the extinction of species that rely on those habitats.

• Oxygen
• Carbon dioxide
• Nitrogen
• Hydrogen

Answer: Carbon dioxide

Carbon dioxide is a greenhouse gas that contributes to climate change by trapping heat in the atmosphere.

Answer: Agricultural runoff

Agricultural runoff often contains fertilizers and pesticides that can contaminate water sources.

• The process of increasing forest cover
• The movement of people from rural to urban areas
• The reduction of carbon emissions
• The conservation of natural habitats

Answer: The movement of people from rural to urban areas

Urbanization refers to the growth of cities as more people move from rural areas, often leading to habitat destruction and increased pollution.

Answer: Reducing fossil fuel use

Reducing reliance on fossil fuels can decrease greenhouse gas emissions, helping to combat climate change.

• Health problems in humans
• Loss of biodiversity
• Increased agricultural yield
• Contaminated water sources

Answer: Increased agricultural yield

Pollution typically harms agricultural yield rather than increasing it, as it can damage soil and water quality.