The Earth is composed of land, air, and water.
Scientific progress is made by asking meaningful questions and conducting careful investigations.
As a basis for understanding this concept, and to address the content in the other three strands, students should develop their own questions and perform investigations. Weather can be observed, measured and described. Scientific progress is made by asking meaningful questions and conducting careful investigations. As a basis for understanding this concept, and to address the content the other three strands, students should develop their own questions and perform investigations. Earth is made of materials that have distinct properties and provide resources for human activities.