30. What was the range in average plant growth? 31. What is the average value of the average plant growth?

H2so4(aq) + mg(s)—> mgso4(aq) +h2(g) which substance is the acid in the reaction?

The agent of mechanical weathering in which rock is worn away by the grinding action of other rock particles is call

Great amounts of electromagnetic energy from our sun and other bodies in space travel through space. which is a logical conclusion about these electromagnetic waves? their energy must be very their frequency must be very low these waves can travel without a medium they only travel through a vacuum of space