These 2 puzzle worksheets reinforce the 38 definitions for the 1st six weeks of the 5th grade Science Scope and Sequence curriculum. There is a worksheet and an answer key. The 1st worksheet contains 17 terms and the 2nd contains 21 terms. Terms include: identify, observe, analyze, classify, investigate, variable, control, hypothesize, accuracy, reliability, advertisements, nutritional labels, measure, interpret, direct evidence, indirect evidence, conclusion, experiment, mass, matter, magnet, r