The rock cycle has been the subject of study for many years. A key component to the rock cycle is the mechanical and chemical erosion of rocks. In this kit students will learn about the rock cycle and the significance of certain types of erosion. This kit also provides an opportunity for students to investigate acid rain and other environmental factors that can be influenced by human actions. Also included is a demonstration that will help students visualize the freezing and thawing action of water on rocks. With multiple activities, this is a kit that is sure to keep students engaged throughout the whole experiment. Aligned to the Next Generation Science Standards (NGSS)* Disciplinary Core Ideas: PS1.B; ESS2.A; ESS2.D Performance Expectations:MS-PS1-5; MS-ESS2-1; HS-ESS2-5 Cross Cutting Concepts: Energy and Matter; Stability and Change; Cause and Effect Engineering Practices: Developing and Using Models; Plannign and Carrying Out Investigations Kit Includes: 350g Plaster of Paris 30mL 1M Hydrochloric Acid 1 Bag Limestone Pieces, 50 Pieces 1 Bag Granite Pieces, 50 Pieces 1 Bag Sandstone Pieces, 50 Pieces 4 Plastic Cups 50 Plastic Bottles with Caps 2 Balloons 20 Disposable Pipettes 50 Plastic Trays WARNING: CHOKING HAZARD Children under 8 yrs. can choke or suffocate on uninflated or broken balloons. Adult supervision required. Keep uninflated balloons from children. Discard broken balloons at once. 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. WARNING: This product can expose you to chemicals including Respirable crystalline silica, which is known to the State of California to cause cancer. For more information go to http://www.P65Warnings.ca.gov.