Energy in the Earth System 4. Many phenomena on the Earth's surface are affected by the transfer of energy through radiation and convection currents. Organisms in ecosystems exchange energy and nutrients among themselves and with the environment. Sources of energy and materials differ in amounts, distribution, usefulness, and the time required for their formation. Investigation and Experimentation 7.
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.