Energy and Matter

• Objects may break into smaller pieces and be put together into larger pieces, or change shapes.
• Energy can be transferred in various ways and between objects.
• Matter is transported into, out of, and within systems.
• Matter is conserved because atoms are conserved in physical and chemical processes.
• The transfer of energy can be tracked as energy flows through a designed or natural system.
• Energy may take different forms (e.g. energy in fields, thermal energy, energy of motion).
• Within a natural system, the transfer of energy drives the motion and/or cycling of matter.
• The transfer of energy can be tracked as energy flows through a natural system.
• Within a natural or designed system, the transfer of energy drives the motion and/or cycling of matter.
• In nuclear processes, atoms are not conserved, but the total number of protons plus neutrons is conserved.
• The total amount of energy and matter in closed systems is conserved.
• Changes of energy and matter in a system can be described in terms of energy and matter flows into, out of, and within that system.
• Energy cannot be created or destroyed—it only moves between one place and another place, between objects and/or fields, or between systems.
• Energy drives the cycling of matter within and between systems.