II Know that energy is needed to get things done and that energy has different forms.
1 Describe how heat can be produced (e.g., burning, rubbing, mixing some substances).
2 Know that heat moves more rapidly in thermal conductors (e.g., metal pan) than in insulators (e.g., plastic handle).
3 Describe the usefulness of some forms of energy (e.g., electricity, sunlight, wind, sound) and how energy (e.g., heat, light,) can affect common objects (e.g., sunlight warms dark objects, heat melts candles).
4 Observe that sound is made by vibrating objects and describe it by its pitch and loudness.
5 Recognize that moving objects carry energy (kinetic energy).
III Identify forces and describe the motion of objects.
1 Describe how the strength of a push or pull affects the change in an object's motion (e.g., how a big or small push affects how high a swing rises).