<span>The rock layers must have formed at different times because they contain two different biozones.
The rock layer containing the trilobites must have formed before the one containing the ammonites.
The key thing to note here is that the Trilobites only lived from 540 to 248 million years ago. And that the Ammonites were from 245 to 65 million years ago. So there's a 3 million year gap between these 2 different creatures where neither of them existed. So the dig where the trilobites were found has to be at least 3 million years older than the dig where the Ammonites were found. So with that in mind, let's look at the options and see what makes sense.
The rock layers must have formed at the same time because they both contain biozones.
* This is nonsense no matter what dates you're speaking of. In effect it claims that all rocks that indicate life were created at the same time. So this is definitely a bad choice.
The rock layers must have formed at different times because they contain two different biozones.
* This is technically incorrect since it assumes that all biozones represent an unique period of time which is incorrect. However, since the biozones represented by the presence of Trilobites and Ammonites don't overlap, it is true that these these rock layers were formed at different times. I would have preferred if this option said "non overlapping biozones". But on the balance, I'd consider this option to be true, so it should be selected.
The rock layer containing the trilobites must have formed before the one containing the ammonites.
* This is definitely true since the last Trilobite died about 3 million years before the first Ammonite lived. So this is a correct choice.
The rock layer containing the trilobites must have formed after the one containing the ammonites.
* This is the opposite of the previous option. And since the previous option was true, this option must be false. So this is a bad choice.</span>
Tectonic hazards do more than cause damage. Through extreme pressure and heat, new resources are formed. Many of these resources are used in transportation and commerce. One of the biggest benefits of volcanoes is extremely fertile soil. Volcanoes also help provide many of the different metals that contribute to a wide spectrum of technology and culture. Copper, gold, silver lead and zinc are all metals developed from magma sources. These naturally-occurring ores are a positive result of tectonic hazards.
Tectonic hazards provide the oil and natural gas that is used all around the world. As tectonic plates press against each other, the pressure not only forms mountains, it also forms oil deposits. When plant matter enters the deposits, coal is formed. This same pressure and heat provide geothermal heating to entire communities across the globe. Many countries rely heavily on geysers for heating.
Scientists are more capable in the 21st century of being able to calculate and anticipate tectonic hazards before they occur. While it is not completely accurate, this knowledge is used to design safer buildings and evacuation plans.
Information from: https://www.reference.com/science/tectonic-hazards-5966e536d5b14cb0
Hope this helps! :)
<u>ANSWER:</u>
Hurricanes so frequent in areas close to the equator because "the ocean water can evaporate more quickly near equator".
<u>EXPLANATION:</u>
- Hurricanes are fast moving wind storms that use heat and most air as their fuel. The air near the 'equator' is warm and moist causing more hurricanes.
- The warm and moist air from the 'ocean surface' rises above and generates an "area of low pressure".
- This causes air from nearby areas to move to the area of low pressure. This new air becomes moist and warm. This warm air when cools forms clouds.
- This cloud systems and winds grows and spins fed by the "water evaporating" from the surface of the ocean. This in turn creates a storm called a hurricane.
True. <span>The National Convention was the most radical and called the execution of the king.
Happy Studying! ^0^
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