Preview the section. Do this quickly. The science section has less text and more data and graphics than the reading section.
Examine the data and graphics. All questions are related to these.
Evaluate graphs. Look for extremes such as maximums and minimums, and for radical changes in data or lines.
Recognize variables in a graph and how they relate to each other.
Understand the way things are measured. Sometimes the test writers put things in the wrong units. Make sure you know the correct units.