4.2.1 Construct an explanation to describe the cause and effect relationship between the speed of an object and the energy of that object. Emphasize using qualitative descriptions of the relationship between speed and energy like fast, slow, strong, or weak.
4.2.2 Ask questions and make observations about the changes in energy that occur when object collide. Emphasize that energy is transferred when objects collide and may be converted to different forms of energy.