Electronic Journal of Differential Equations, Vol. 2007(2007), No. 72, pp. 1-13. Title: Oscillation of second-order nonlinear impulsive dynamic equations on time scales Authors: Mugen Huang (Hanshan Normal Univ., Chaozhou, China) Weizhen Feng (South China Normal Univ., Guangzhou, China) Abstract: In this article, we study the oscillation of second-order nonlinear impulsive dynamic equations on time scales. Using Riccati transformation techniques, we obtain sufficient conditions for oscillation of all solutions. An example is given to show that the impulses play a dominant part in oscillations of dynamic equations on time scales. Submitted November 27, 2006. Published May 15, 2007. Math Subject Classifications: 39A10, 39A11, 39A99, 34C10, 34K11. Key Words: Oscillation; impulsive dynamic equations; time scales.