Help me with this please.

Mary is conducting an experiment on how pollution affects plant growth. how can she ensure that her data are reliable?

How does the viscosity of magma change as magma cools?

Question 3(multiple choice worth 4 points) (04.04 lc) what does it mean when an element is reduced? it empties a valance shell, reducing its atomic radius. it gains electrons, reducing its overall charge. it increases electronegativity, reducing its ability to bond. it loses electrons, reducing its electron number.