# Unseen Forces Test Copters

## Transcription

Unseen Forces Test Copters

Segment 3 Unseen Forces Test Copters Bugs O’Copter Purpose Procedure LEARN ����������������������� FUN! Objective ToTo practice controlling variables to determine rate of descent. practice controlling variables to determine rate of decent. Procedure 1. 1. You willwill need 3 Test Copters. To makeTo themake Copters ready to fly, You need 4 Bugs O’Copters. Bugs ready to cut thefly, patterns (p. 2-3)(p. along lines and lines fold along lines. 33)solid along solid and dotted fold along cut pattern Fold flap Alines. backwards, flapABbackwards, forward, flapflap C backward, andflap flap D dotted Fold flap B forward, forward. C backward, and flap D forward. Label your Bugs 1, 1, 2, 2,and 3, and 2. 2. Label your Copters 3. 4. MATERIALS Per Group Materials scissors 3 Copters (p. 2-3) scissors paper clips (for weights) 4 Bugs O’Copters stopwatch paper clips (for weights) meter stick stopwatch Per Student meter stick journal science science journal 3. Set stopwatch to zero. Note: You will start the stopwatch 3. Set stopwatch to zero. Note: You will start the stopwatch when your when your partner lets go of Bugs and stop the stopwatch partner lets go of the Copter and stop the stopwatch when their Copter when Bugs hits the ground. hits the ground. 4. Working with your partner, hold Bugs #1 1.5 m (150 cm) DEOXYS ��������������������������� �������������������������� ������������������������ ������������������������� ���������������������������� 4. Working withfloor yourand partner, Copter 1.5 mtimes (150 cm) from the floor from the drophold while your #1 partner its descent. and drop while your partner times its descent. See diagram 1. See diagram 1. Record time yourchat science journal. 5. 5. Create your ownindata and record time in your science journal. 6. To determine the average rate of descent, repeat Steps 4-5 6. To determine the average rate of descent, repeat Steps 4-5 for two for two more trials and average your data. more trials and average your data. 7. Calculate the rate of descent by using the formula R = d/t 7. Calculate rate of divided descent by by time) using the d/t sci(Rate =the distance andformula recordRin=your (Rate = distance divided by time) and record in your science journal. ence journal. ��������������������������������� = avg. rate of descent ÷ distance (150 cm) time (# seconds) Bugs##2,2,change changea avariable variable bending or folding a por-of 8. 8. OnOn Copter byby bending or folding a portion tion of each ear and repeat steps 3-7. each blade and repeat steps 3-7. 9. Change the variable of distance by decreasing the height 9. Change the variable of distance by decreasing the height from the floor from the floor to 1 m (100 cm) and repeat steps 3-7 for to 1 m (100 cm) and repeat steps 3-7 for Copter #1 and #2. Bugs #1 and #2. Diagram 1 10. Add 1-31-3 paper clipsclips to Copter #3 #3 andand repeat stepssteps 3-7. 3-7. 10. Add paper to Bugs repeat 11. Determine a variable of choice your choice to change andsteps repeat 11. Determine a variable of your to change and repeat 3-7 on steps 3-7Copters. on Bugs #4. one of the 12. Create a graph showing the rate of descent for each variable tested. 12. Create a graph showing the rate of descent for each variable tested. ConclusionConclusion 1. Did all Bugs drop the same? Why or why not? What were the that changed 1. 2. Did all Copters dropvariables the same? Whyyou or why not? in each experi- ment? 3. Why is it important to keep all other variables constant dur3. Why it important to keep all other variables constant during an ingisan experiment? experiment? 4. Calculate the average speed for all the Bugs. Compare Bugsspeed O’Copter leaves, animals, or 4. 5. Calculate theyour average for allwith of theother Copters. seeds in nature. 2. What were the variables that you changed in each experiment? Extension 5. Compare your Copter with leaves, animals, or seeds in nature. 1. To determine the number of rotations the Bugs O’Copter makes as it descends, (1) tape a piece of cassette ribbon Extensions cm) tothe the bottom of Bugs, the (2) Copter stand on the loose end 1. To(100 determine number of rotations makes as it descends, the aribbon and pull Bugs up(100 so that no twists in (1)oftape piece of cassette ribbon cm) there to the are bottom of a Copter, ribbon, (3)end drop Bugs as usual. Count the number (2)the stand on theand loose of the ribbon and pull the Copter up so that of twists the ribbon to determine of rotations. there are nointwists in the ribbon, and (3) the dropnumber the Copter as usual. Diagram 2 Varythe thenumber height.ofSee diagram Count twists in the 2. ribbon to determine the number of rotations. Vary the height. See diagram 2. 48 2000-2001 Series: The Case of the Challenging Flight Learn the real science behind the fun of the Pokémon Trading Card Game: EX Unseen Forces http://ksnn.larc.nasa.gov/pokemon 1 LEARN ����������������������� FUnseen UN! Forces Test Copters 2. After the Copter is dropped, construct a bar graph that shows the relationship between the height and the number of twists. DEOXYS ��������������������������� �������������������������� ������������������������ ������������������������� 3. Experiment with various weights of paper and graph the results. 4. Have students determine relationships between the weight, height of launch, shape, and the length of the “blades.” 5. Have students determine if the “blades” turn in a clockwise or counterclockwise direction. 6. Compare the flight of the Copters to that of a maple seed or dandelion. ���������������������������� ��������������������������������� Explanation Your Copter spiraled down, demonstrating its natural gliding flight that is similar to the leaves, petals, and seeds in nature. It changed speed and maybe even direction when you changed the variables. As you observe nature, you will see that no two species of leaves, petals, or seeds are exactly the same. Nature has changed the variables so they all have their own unique characteristics that suit them best for their environment. When conducting flight research, scientists observe the characteristics of objects in nature and how they glide. Scientists will sometimes try to duplicate their observations and then change variables to determine what would work best for a glider, plane, or space shuttle. Pattern 2 2 http://ksnn.larc.nasa.gov/pokemon Learn the real science behind the fun of the Pokémon Trading Card Game: EX Unseen Forces LEARN ����������������������� FUnseen UN! Forces Test Copters Patterns DEOXYS ��������������������������� �������������������������� ������������������������ ������������������������� ���������������������������� ��������������������������������� http://ksnn.larc.nasa.gov/pokemon Learn the real science behind the fun of the Pokémon Trading Card Game: EX Unseen Forces 3 3