True or false
1.Pyroclastic flows and surges are potentially highly
destructive owing to their mass, high temperature, high
velocity and great mobility.
2. Lahars are rapidly flowing thick mixture of volcanic
sediments (from the pyroclastic materials) and water, usually
triggered by intense rainfall during typhoons, monsoons and
thunderstorms. Lahars can occur immediately after an eruption
or can become long-term problem for as long as there are
excess sediments on the volcano‘s slope and water to
remobilize these.
3. Lava flows are considered the most dangerous type of
hazard from a volcano and is always a big threat to human
lives.
4. During eruption, excessive ashfall is dangerous as it can
cause poor or low visibility.
5. Ash from volcanoes are also abrasive, because of this, ash
suspended in air is also dangerous for airplanes as this can
cause the engines to fail if the suspended ash is encountered
by the airplane.
6. High concentrations of CO2 which is colorless and odorless
can be lethal to people, animals and vegetation.
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Answer:
1.true
2.true
3.true
4.true
5.true
6.true
Explanation:
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