By investigating how friction, including air resistance, affects motion, I can suggest ways to improve efficiency in moving objects. 

SCN 2-07a

Benchmarks:

·    Describes friction as a force which opposes the motion of moving objects, for example, two solid surfaces rubbing against one another or a solid surface moving through air or water.

·   Finds an association between air resistance (drag), the speed of the object being investigated and the surface area exposed to the air, making links to original predictions.

·  Demonstrates understanding of how friction and air resistance can both be useful, for example, in braking systems, and also a problem, for example, causing moving parts to wear.

·  Describes efficient movement as that which requires the least possible energy and suggests ways to improve efficiency in moving objects, for example, by streamlining.