C. The number is even or less than 12
Explanation:
Number 2 can be selected randomly and According to option A the number selected should be greater than 2.
B option is saying that the number is not divisible by 5 but the sample set contains { 2,3,4,5,6,7,8,9,10} . 5 and 10 can be selected and they are divisible by 5.
According to C even number can be selected or the numbers that are lesser than 12. The word "or" should be note here . Any number even or odd may be selected but it will be lesser than 12 so this will be the correct option.
Every element of sample set is either prime or composite so the selected number can either be prime or composite
Square root of 9 is 3 and square root of 10 is greater than 3. Statement will not be correct if number 9 or number 10 got selected the
Answer:
oceanic crust sinks because it is denser and has higher specific gravity than the more silicon aluminum enriched continental crust. What drives substitution is convection and conduction in outer core of earth, that heat , only a small part of which is due radioactive isotopes, has to make it's way to Earth's surface by both conduction and convection. Iron and nickel o have the highest specific gravities of the 10 most common elements in the Milky Way Galaxy. This is why oceanic crust sinks and is subducted continental crust has to have a lot more force applied before it inks, because it doesn't want to sink.
Wegener could not provide a wholly acceptable explanation for the movement of the continents.
Explanation:
Alfred Wegener is the person that developed and promoted the continental drift theory. Despite him having developed the basic idea behind the process, as well as managing to find several clues to support it, his ideas were not accepted by the other scientists and he found it extremely hard to gain support. The main reason as to why this was the case was that he didn't really had wholly acceptable explanation about the movement of the continents.
Everything that Wegener provided as evidence was correct, and it was proving a point. The problem was that he still lacked explanation for the driving force of this process, nor did he had any proof about it, and that was the basis for all other things. Every clue that he had was the final product, but no one could explain as to how that actually happened.
Some of Wegener's evidence were:
- identical fossils on different continents
- matching coastlines
- spreading zones
- matching rock strata on different continents
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Answer:
Erosion breaks existing rocks and turns them into sediments. The sediments can be formed into rocks by the chemical reactions of dissolved seashells ( Calcium Carbonate.) This reaction can form sediments into rocks very quickly like the formation of concrete ( same chemical reaction). Erosion only happens on the earth's surface.
As erosion only happens on the earth's surface, sedimentary rocks are only formed on the earth's surface.
In other words:
Sedimentary rocks only found on or close to Earth's surface because sedimentary rocks are made of materials deposited in layers at the Earth's surface.
