Answer:
3. They are moving towards each other.
4. Europe and Asia are on the same tectonic plate and they also have no ocean between them.
5. They are Mid Atlantic Ridge, African Plate, South American Plat, and the North American Plate.
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Answer:
50,000 years
Explanation:
rate of deposition of clay is 1mm per 1000 years so for 5cm or 50mm of ooze it will take 50×1000 years= 50,000 years.
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.
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Below are the choices that should be accompanied with your question:
A) Winds will increase.
B) Winds will increase then decrease.
C) Winds will stay the same.
<span>D) Winds will decrease.
</span>
The answer is A - Winds will increase. Isobars<span> are lines on a weather map that connect points of equal pressure.</span>
Volcanoes on Mars resemble Hawaiian Shield Volcanoes found on Earth, meaning that the answer is D.
