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Students observe an extreme endothermic reaction between 2 solid compounds. They are provided real-world context relevant to endothermic reactions and asked to draw upon their prior knowledge to predict the outcome of the demonstration. Students demonstrate their grasp of the scientific concepts underlying the demonstration through a particle-level explanation and critical thinking.

Students observe an extreme endothermic reaction between 2 solid compounds. They are provided real-world context relevant to endothermic reactions and asked to draw upon their prior knowledge to predict the outcome of the demonstration. Students demonstrate their grasp of the scientific concepts underlying the demonstration through a particle-level explanation and critical thinking.

Time Requirement
Total, 30 minutes. Teacher prep, 15 minutes. Demonstration and discussion, 15 minutes.

Digital Resources
Includes 1-year access to digital resources that support 3-dimensional instruction for NGSS. Digital resources may include a teacher manual and student guide, pre-lab activities and setup videos, phenomenon videos, simulations, and post-lab analysis and assessments.

Performance Expectations
HS-PS1-4

Crosscutting Concepts
Energy and Matter

Disciplinary Core Ideas
PS1.B: Chemical Reactions

Science and Engineering Practices
Developing and Using Models

Learning Objectives

• Use prior knowledge to predict what will happen in a chemical reaction.
• Write a balanced chemical equation for an endothermic reaction.
• Illustrate and explain an endothermic reaction on a molecular level.

Prerequisite Knowledge and Skills
Students should be familiar with writing chemical formulas, writing and balancing chemical equations, and interpreting energy level diagrams.

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