ALS Learning Activity Sheet ALS Learning Activity Sheet Learning Strand II: Scientific Literacy and Critical Thinking Layers of Earth and Its Composition, e.g. Crust, Mantle, Core Practicing Safe and Ethical Use of Mobile Devices How Simple Machines Help Make Work Easier and Faster Outstanding Contributions of Science that Enhanced the Quality of Life and Levels of Thinking Explain the Process of Fertilization through an illustration. Common Practices, Beliefs, and Phenomena with Scientific Basis