Explore the 2019 activities on surface area, concentration, temperature, and catalysts with this interactive Gizmo. Understand collision theory by studying activated complex, catalysts, enzymes, molecules, and more. Discover how surface area, concentration, and catalysts impact reaction rates. Predict and gather data on reaction half-life with different settings. Enhance your understanding of chemical reactions with this engaging learning tool. Click to reset the Gizmo and begin your exp…