Complies with NGSS:

NGSS 4. Energy
4-PS3-1, 4-PS3-2, 4-PS3-3, 4-PS3-4, 4-ESS3-1 (optionally fit into 5th grade)

Core Disciplinary Ideas:
PS3.A: Definitions of Energy;
PS3.B: Conservation of Energy and Energy Transfer;
PS3.C: Relationship Between Energy and Forces
ETS1.A: Defining Engineering Problems

Mechanics, Waves & Energy: Types of Energy
Radiant, Sound, Thermal, ElectroMagnetic, Gravity, etc., Kinetic and Potential Energy, Energy Transfer, Conservation of Energy and Entropy.