Energy and matter have multiple forms and can be changed from one form to another . Light has a source and travels in a direction . Objects in the sky move in regular and predictable patterns . The number of stars that can be seen through telescopes is dramatically greater than can be seen by the unaided eye.
Scientific progress is made by asking meaningful questions and conducting careful investigations .
Electricity and magnetism are related effects that have many useful applications in everyday life. Scientific progress is made by asking meaningful questions and conducting careful investigations. Elements and their combinations account for all the varied types of matter in the world . Water on Earth moves between the oceans and land and through the processes of evaporation and condensation . Energy from the Sun heats Earth unevenly, causing air movements that result in changing weather patterns .