Calcium carbide is placed in a cylinder containing water. A reaction occurs producing acetylene gas bubbles. A plastic tube from a chlorine gas generator is placed in the cylinder. As the bubbles of acetylene and chlorine collide flashes of light are produced. Aligned to the Next Generation Science Standards (NGSS)* Disciplinary Core Ideas: PS1.A; PS1.B Performance Expectations:HS-PS1-1; HS-PS1-2; HS-PS1-5 Cross Cutting Concepts: Patterns Engineering Practices: Developing and Using Models Kit Includes: 1 x 250mL Sodium Hypochlorite 1 x 30mL Hydrochloric Acid, 1.0M Solution 1 x 10g Calcium Carbide, Lumps DOT Info: Small quantity exemption 173.4 THIS PACKAGE CONFORMS TO 49 CFR 173.4 for domestic highway or rail transport only *”Next Generation Science Standards” is a registered trademark of Achieve. Neither Achieve nor the lead states and partners that developed the Next Generation Science Standards was involved in the production of, and does not endorse, this product.