Power of The Planet Flashcards
(17 cards)
When did the universe begin?
Around 13.8 billion years ago.
This event is known as the Big Bang.
How long ago did Earth form?
About 4.6 billion years ago.
When did life on Earth begin?
Around 3.5 billion years ago with simple organisms.
What led to the development of humans?
Evolution from simple organisms to complex multicellular life.
What are the divisions of Earth’s history?
Eons, eras, periods, epochs, and ages.
What are some major events in Earth’s history?
Mass extinctions and the rise of dominant species.
What are the layers of the Earth?
Crust, Mantle, Outer Core, Inner Core.
What drives geological processes in the Earth’s core?
Extreme heat.
What drives plate tectonics?
Convection currents in the mantle.
What can occur at plate boundaries?
Earthquakes, volcanoes, and mountain formation.
Who is most at risk from tectonic hazards?
Populations near plate boundaries.
What challenges do developing nations face regarding disasters?
Struggling with disaster response.
What are some volcanic hazards?
Lava flows, ash clouds, pyroclastic flows, lahars.
What are the effects of volcanic hazards?
Local destruction and global climate impact.
What caused the Montserrat 1997 eruption?
Subduction at the Caribbean plate boundary.
What were the effects of the Montserrat 1997 eruption?
19,000 citizens dead, airport destroyed, tourist industry collapsed
What were the responses to the Montserrat 1997 eruption?
Large scale evacuation, abandonment of the capital, significant British aid from the British government
