Inspect, disassemble, and reassemble simple mechanical devices and describe
what the various parts are for; estimate what the effect that making a
change in one part of a system is likely to have on the system as a whole.
| NSES Content Standard E
Science and Technology: Abilities of technological design Grades 5-8, page 165 Design a solution or product. Students should make and compare different proposals in the light of the criteria they have selected. They must consider constraints--such as cost, time, trade-offs, and materials needed--and communicate ideas with drawings and simple models. |