Refer to Scientific Method Guidelines. Changing the weight, size, or shape of an object will affect the way it moves through the air. The force of moving air can make things move. Flight has changed with technology over time. People of different races, cultures and genders have contributed to the development of flight over time.
Structures have similarities and differences.
The shape of a structure affects its stability and strength. The base of a structure affects its stability and strength. Materials have different strengths. Properties of materials need to be considered in design and construction. Models are representations of real structures.