What is coral bleaching, and what human activity is primarily responsible for it?

Coral bleaching is the whitening of coral reefs due to the loss of algae. It is primarily caused by rising ocean temperatures due to climate change caused by human activities.

Explain how the death of coral reefs can affect coastal erosion.

Coral reefs act as natural barriers that protect coastlines from erosion. When they die, this protective barrier is lost, leading to increased erosion.

Describe two ways that oil spills can harm marine life.

Oil spills can coat animals like birds, preventing them from flying or swimming, and can also disrupt the natural balance of the aquatic environment, affecting fish and other organisms.

What is a hypoxic zone (dead zone), and what human activity contributes to its formation?

A hypoxic zone is an area in the ocean with very low oxygen levels. Runoff of fertilizers and sewage from agriculture and urban areas contributes to its formation.

Explain the process by which fertilizer runoff leads to the creation of oceanic dead zones.

Fertilizer runoff promotes excessive algae growth. When the algae dies and decomposes, the decomposition process consumes oxygen, leading to low oxygen levels and the creation of dead zones.

Human Impact on Oceans

Grade 10th Grade · Science · 45 min

What's Included

Learning Objective

I can analyze the impact of human activities on ocean ecosystems.

Warm-Up Video

Khan Academy · 4:42

Human impact on aquatic environments| AP Environmental science| Khan Academy

Guided Notes

3 key concepts

1
Coral reefs are sensitive to temperature changes, and warming ocean temperatures can cause bleaching, where the coral dies off.
2
Oil spills harm aquatic life, such as birds, by preventing them from flying or swimming, disrupting the ecosystem.
3
Fertilizer runoff from agriculture can cause hypoxic zones or oceanic dead zones, where algae growth and decomposition deplete oxygen levels in the water.

Practice Questions

10 questions · Multiple choice & Short answer

Exit Ticket

Quick comprehension check

“Describe three ways human activities are negatively impacting ocean ecosystems, according to the video. Be specific about the activity and its effect.”

Complete Lesson Package

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Human Impact on Oceans

What's Included

Learning Objective

Warm-Up Video

Guided Notes

Practice Questions

Exit Ticket

Complete Lesson Package

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