The mass number of an element is equivalent to the number of Protons and Neutrons in the element. For example Oxygen has eight protons and neutrons, therefore its mass number is 16. You could also calculate this by simply rounding the atomic weight of the element to the nearest whole number. Oxygen's atomic weight is 15.994, which as you can see, would be rounded to 16 :)
Very easy gravity is strong from the universe.
Answer:
<em>B. or D. (I'm leaning towards D.)</em>
Explanation:
<em>Moving plates can cause earthquakes and other internal quake disasters. Such as volcanic eruptions. They can also form mountains creating new terrain.
</em><em>~ LadyBrainiac</em>
Answer:
C
Explanation:
Because the hot magma flow in the convection currents and these currents move the tectonic plates and make up the Earths crust.
