Something that happen naturally, like a plant growing on its own is a natural occurrence
The simplified answer would be 31
Explanation:
Seismic waves are waves of energy that: ... At a seismic station the second waves to arrive are ... (a) a skier moving down a mountain hill,.
Answer:
b less dense and thicker under the continents than under the oceans
Explanation:
- <em>Oceanic crust </em>is found under the ocean, it's about 6 kilometers thick and is destroyed in subduction zones just like the continental crust. It's composed of several layers and it differs from continental crust because it's thinner, denser, younger and with a different chemical composition (olivine, pyroxene, and amphibole).
- <em>Continental crust</em> is thicker (100 kilometers) and less dense than oceanic crust, it resists subduction and its age is 30 times the average of the ocean's age.
Considering this information we can conclude that the correct asnwer is: b less dense and thicker under the continents than under the oceans.
I hope you find this information useful and interesting! Good luck!
Answer: B. Confining pressure decreases on a rising magma, allowing gas bubbles to expand and fracture the magma. This process further decreases pressure on the magma and will result in an explosive event.
Explanation: The bubbles inside the magma are responsible for making it bubble to the surface of the earth crust and the explosion that follows. As magma rises to the surface of the earth, it absorbs gases and water vapor which forms bubbles in the magma. As the pressure decreases in the magma, it causes these bubbles to increase. When the rise of magma cannot keep up with he growth in the bubbles, there is an explosive eruption to the surface. Compare this to shaking a Coca Cola bottle before opening it.
If the magma rise keeps us with the gas bubbles, the eruption is not explosive.
