Which action changes the identity of the substance referenced?
a. breaking an ice cube
b. running an electric current through copper
c. burning wood
d. melting gold

What does the xylem do? stores the glucose captures the sunlight absorbs oxygen into the leaf carries water from the roots to the leaves

What is the ph of a solution that has a hydrogen ion concentration of 1.0 * 10 -9 m?

According to the diagram, what sources contribute to the phosphorus found in soil? according to the diagram, phosphorus found in soil contributes phosphorus to what other sources?