Compare and contrast stress versus strain in the Earth’s crust This section introduces you to the concepts of stress and strain. You will learn their definitions and how they impact the Earth’s crust....Compare and contrast stress versus strain in the Earth’s crust This section introduces you to the concepts of stress and strain. You will learn their definitions and how they impact the Earth’s crust. Differentiate between the types of stress: tension, compression, shear. Differentiate between the types of strain: elastic, ductile, and fracture. The learning activities for this section include the following: Self Check: Stress and Strain Authored by: Kimberly Schulte and Lumen Learning.