Natural Hazards and Disasters Concepts

The lecture by Praveen Sebastian Paul discusses natural hazards and disasters, explaining that natural hazards are threats from natural events that negatively impact humans, becoming disasters when they cause harm. Geological processes, while often beneficial, can pose risks to humans. Hazard mitigation involves actions to reduce these risks. Technological disasters, caused by human activities, are also covered. The lecture highlights the benefits of natural processes like volcanism and earthquakes, and classifies various natural hazards, emphasizing the importance of understanding and mitigating these risks.

What is the primary difference between a natural hazard and a natural disaster?

• A natural hazard is man-made, while a natural disaster is natural.

• A natural hazard is a potential threat, while a natural disaster is the actual event causing harm.

• A natural hazard is always beneficial, while a natural disaster is always harmful.

• A natural hazard occurs only in specific regions, while a natural disaster can occur anywhere.

Why are natural disasters considered inevitable?

• Because they only occur in uninhabited areas.

• Because they are caused by human activities.

• Because they can be predicted accurately.

• Because they are a result of natural processes that have always occurred on Earth.

What role do humans play in defining natural disasters?

• Humans have no impact on natural disasters.

• Humans cause all natural disasters.

• Humans can prevent all natural disasters.

• Without humans, natural events would not be considered disasters.

What is the purpose of hazard mitigation?

• To reduce or eliminate the long-term risk to life and property from hazard events.

• To increase the frequency of natural disasters.

• To ensure that natural hazards occur more frequently.

• To eliminate all natural hazards.

What is a key characteristic of risk in relation to natural hazards?

• Risk can be completely eliminated.

• Risk is not influenced by human actions.

• Risk is the interaction between humans and geological processes.

• Risk is only present in urban areas.

Which of the following is considered a technological disaster?

• Earthquake

• Volcanic eruption

• Hurricane

• Oil spill

Which of the following is NOT a natural hazard?

• Landslide

• Airplane crash

• Flood

• Tornado

How do volcanic eruptions benefit the Earth?

• They eliminate all natural hazards.

• They prevent earthquakes.

• They produce much of the water and atmosphere on Earth.

• They cause widespread destruction.

What is one of the benefits of erosional processes?

• They prevent the formation of rivers.

• They deplete soil nutrients.

• They help replenish soil and sustain life.

• They cause permanent damage to landscapes.

Which of the following is a slow-developing hazard?

• Tsunami

• Drought

• Earthquake

• Hurricane