On the morning of May 18, 1980, the US witnessed one of the most significant natural disasters in its history - the eruption of Mount St. Helens. This eruption, caused by a bulging magma chamber beneath the surface, resulted in a devastating lateral blast. Here s the science: The Earth s crust is made of giant slabs called tectonic plates. When these plates collide, it can cause magma from the Earth s core to push up, forming volcanoes. When the pressure becomes too great, just like in a shaken soda bottle, it erupts. The Mount St. Helens eruption caused massive environmental destruction, with forests flattened and rivers clogged. Yet, it also led to an incredible period of renewal and growth. Nature gradually reclaimed the land, turning the devastation into a fertile landscape over time. The human impact was substantial, causing loss of lives and property. It served as a reminder for us to respect nature s power and prepared us to face such disasters in the future. Understanding and preparing for natural disasters is our best defense against their devastating effects.
Question 1
When did the eruption of Mount St. Helens occur?
B
May 18, 1980
Explanation. The eruption of Mount St. Helens occurred on the morning of May 18, 1980.
Question 2
What causes magma from the Earth s core to push up and form volcanoes?
A
When gravity pulls it upward
B
When the atmosphere pushes it upward
C
When tectonic plates separate
D
When tectonic plates collide
Explanation. The collision of tectonic plates can cause magma from the Earth s core to push upward, forming volcanoes.
E
When the moon exerts its pull
Question 3
What effect did the eruption of Mount St. Helens have on the environment?
B
It led to an increase in wildlife
C
It flattened forests and clogged rivers
Explanation. The Mount St. Helens eruption caused massive environmental destruction, with forests flattened and rivers clogged.
D
It improved soil fertility
E
It reduced greenhouse gas emissions
Question 4
What was the human impact of the Mount St. Helens eruption?
A
It led to a decrease in population
B
It caused loss of lives and property
Explanation. The human impact of the Mount St. Helens eruption was substantial, causing loss of lives and property.
C
It created new job opportunities
D
It improved the local economy
E
It led to an increase in tourism
Question 5
What can we learn from natural disasters like the eruption of Mount St. Helens?
A
They are unpredictable and can t be prepared for
B
They are caused by human activity
C
They lead to permanent environmental damage
D
Understanding and preparing for them is our best defense against their devastating effects
Explanation. Understanding and preparing for natural disasters is our best defense against their devastating effects.
E
They have no significant impact on human lives