Which element is needed for
a. Bone and teeth formation.
b. Treatment of water.

Which of the following true? a_volcanoes and earthquakes often near the plate boundaries. b_volcanoes occur whereve there are tall mountains. c_earthquakes cause volcanoes in the same location to erupt violently d_volcanoes and earthquakes occur only where plates are colliding with each other

Why doesn't heat added to water make the tempature rise above 100c

When would a bouncy ball have the most potential energy