Answer:
Oceanic, Seafloor Spreading, Submarine Volcanic, Rift Valleys, Great african
Explanation:
DIVERGENT PLATE MARGIN (Also known as a constructive boundary or an extensional boundary)
Here two plates moves __away__________from each other. Molten rock, or magma, immediately rises to fill any possible gap and forms new <u>oceanic</u> crust. When this happens underwater, it is described as <u>seafloor spreading</u>. Huge underwater <u>submarine volcanic</u> ranges are formed from magma coming up from the mantle. Over time these submarine volcanoes may become large enough to reach the surface .eg. Iceland in the North Atlantic Ocean.
Where plates move apart on land, <u>rift valleys</u> are formed. An example of this is the <u>Great African</u> Rift Valley.
==> the object's mass; ==> how close you can get to its center.
Answer:
Local and unique ways of being are increasingly replaced by more homogenized and standard ways of being that are shared across cultures. The world seems smaller because with all of this global integration there is a sameness or familiarity no matter where you are.
Answer:
B and C
Explanation:
B. In a given rock sample, the amount of Silicon-32 isotopes gets divided in half about every 170yrs.
This is the concept of half-life. Half life is the time take for half of a radioactive isotope to disintegrate. The shorter the half life the faster the isotope disintegrates.
From the question, we were told that it would take 170yrs for half of the isotope of Silicon to disintegrate to Phosphorus. This is the half life.
C. The half life can be used to determine the amount of Si-32 that has decayed from the time closure temperature was reached.
The closure temperature is very important in radioactivity. It is the temperature at which a system has cooled and there is no resulting disintegration of parent and daughter isotopes.
From first order kinetics, we know that the rate at which radioactive elements decay at any time is directly proportional to the number of radioactive atoms present. A knowledge of the half life helps to figure out the number of atoms that has decayed in time.
True
Led by the Prime Minister of Morocco.
Hope this helps!
