Answer:
Under water mountains or volcanoes.
Explanation:
Answer: The Prime Meridian
Explanation:
There are imaginary lines that are drawn across the Earth from the North pole to South pole called lines of longitude. They help in the identification of locations around the world when used in conjunction with latitudes.
Lines of Longitude are measured in degrees with the middle line measuring 0°. This is the Prime Meridian and it passes through countries like the UK and Ghana. The Prime Meridian is the basis for the various time zones that we have on Earth with it representing the GMT.
Answer:
Basaltic (mafic) magmas are hotter and have higher viscosity than felsic magmas
Explanation:
- The most accurate statement related to the viscosity of magma is the amount of silica content in this as more the vicious magma will be more is the content of deadly gases and thus more rapid and dangerous will be the explosion of lavas with gas.
- The higher the amount of gas and the high level of felsic lava produced has a higher velocity and explosive rate thus is more silicic which is a result of the chemistry, which is high in aluminum, potassium, sodium, and calcium contents forming a liquid rich lava and temperature can go high as 650 to 750 degrees.
- As compared to the mafic lava have a higher concentration of ferromagnesian which can generally erupt at a temperature of more than 950 degrees. Thus flow at higher speeds and for longer distances.
Answer:
A and C
Explanation:
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
People start to fil more complaints which lead to other problems and strikes on stuff like this.
