Hazards and Natural Disasters

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A hazard only affects property, while a natural disaster affects both property and people.
A hazard is a natural event, while a natural disaster is a man-made event.
A hazard is a naturally occurring event, while a natural disaster is a human-made event.
A hazard is a potential threat, while a natural disaster is a realized event with negative consequences. (correct)

Lahars are a type of volcanic eruption that releases large amounts of molten rock and ash.
Lahars are formed by the accumulation of ash and rock on the volcano's slopes, potentially causing damage when mixed with water.
Lahars are caused by volcanic eruptions and pose a threat to life and property. (correct)
Lahars are the result of the buildup of pressure within the volcano, which can trigger an eruption.

The deeper the earthquake's focus, the more seismic waves are generated, leading to a higher magnitude.
The deeper the earthquake's focus, the more energy is released, resulting in a larger magnitude.
The deeper the earthquake's focus, the longer it takes for seismic waves to reach the surface, weakening their intensity. (correct)
The deeper the earthquake's focus, the more likely it is to cause a tsunami.

<p>The formation of volcanoes due to the melting of the descending plate. (B)</p> Signup and view all the answers

<p>The sinking of denser oceanic crust beneath less dense continental crust. (A)</p> Signup and view all the answers

A naturally occurring event that poses risk to humans and property.

Occurs when a vulnerable population suffers loss of life or property due to a hazard.

A volcanic hazard formed from volcanic ash, rocks, and water mixing during rainfall.

Energy waves that travel from the focus of an earthquake, weakening with distance.

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An area where oceanic crust sinks beneath continental crust, causing friction and movement.

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A hazard is a naturally occurring event posing risk to humans and property.
A natural event is a hazard only if it affects humans.
Natural disasters occur when a vulnerable population experiences loss of life or property due to an event.

Lahars are a volcanic hazard.
They form when volcanic eruptions deposit loose rocks and ash on the volcano's slopes.
Rainwater mixes with this material, causing lahars to flow.
Lahars cause property and human damage.

Water and gases are dissolved in magma.
Earthquake magnitude is affected by distance from the focus.
Seismic waves travel further, the longer it takes, the more their energy dissipates.
Seismic waves are weaker and less intense at the epicenter.