Crust:outer silicate solid crust
mantle:highly viscous
core:solid inner core
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.
Help ,,,,,,,,,,,,,,,,
Andru [333]
Answer:
<u><em>B. Water Temperatures </em></u>
Explanation:
It was warm so people didn't die from cold at all
Answer:
Monsoons cause wet and dry seasons throughout much of the tropics. Monsoons are most often associated with the Indian Ocean. Monsoons always blow from cold to warm regions. The summer monsoon and the winter monsoon determine the climate for most of India and Southeast Asia.
Explanation:
Sand is suspended in the water of seas and oceans by the action of waves and currents, and it is then deposited by the same wave action and storm surges at high tides or high water levels. Over time, the sand accumulates to create beaches, which are actually enormous sandbars.
<h3>Where will sand deposition cause the beach to spread for the first time?</h3>
around the area where the waves break. The sediments rub up against one another as a result of the moving water.
<h3>What is the primary reason for the incoming waves?</h3>
The most frequent waves are surface waves, which are brought on by wind moving over the air-water interface and causing a disturbance that gradually increases as the wind blows and the wave crest rises. The waves you see at the beach often are surface waves, which are continually present around the world.
To Know more about sandbars.
brainly.com/question/752555
#SPJ4
