Copy and paste this lab into a word document.  Follow the Devise plan and write out a Procedure.  Write a purpose based on the problem.  Write out your observations in a section named Observation before the Analysis and Conclude section.  Write the analysis and conclude as a continuous multi-paragraph section.  Below the questions is the rubric.

Air in Motion

Problem
    What will happen when four different kinds of balls are put into a vertical flow of fast-moving air?

Suggested Materials
     variable-speed hair dryer
     balloon inflated to about 15 cm
     table tennis ball
     hollow-centered rubber or plastic ball 3-to 4 cm in diameter golf ball

Safety
    Keep your hands away from the hair dryer's exhaust opening as it will get hot.  Do not use the dryer near water.  Do not throw or drop golf balls.

Devise a Plan 
    1.  For each of the four objects, write a hypothesis about what will happen when the object is put into the fast-moving vertical flow of air from the hair dryer.
    2.  Decide exactly how you will test your hypothesis.  Write down your plan.
    3.  Carry out your plan and record your results.

Analyze and Conclude
    After following the plan you devised, answer the following question.

    1.  What happened?  Were your hypotheses proven correct?  Did you speed of the airflow makes a difference?
    2.  Use your knowledge of fluids in motion to explain your observations.  What forces were involved in this experiment?  Were they balanced or unbalanced?
    3.  Does Pascal's principle apply in your experiment?  Why or why not?
    4.  Rank the objects according to their densities.  Make rough estimates of their densities compared to the density of water.  Which do you think would float on the surface?  Which ones would sink?
 
 

In assessing your performance, I will be the rubric designed for Air in Motion