Science Fair Posters

1. Science Fair Posters Aim What should you have on your science fair project poster?

2. Science Fair Posters • Your Science Fair Posters should have all the information of a lab report all on one page. • Remember that a lab report has six parts. • Do you Remember what the six parts of the lab report are?

3. Science Fair Posters The six parts of a Lab Report are: • The Objective or The Title Question • Claims • Background • Hypothesis • Materials List • Procedures • Results • Conclusions

4. Science Fair Posters • Title • How would you sum up your entire project in one sentence? • What were you looking to find out? • What is the experiment about?

5. Science Fair Posters • Title • A one sentence question or statement that sums up the scope of your experiment. • How Long Does the Charge of a Wind-Up LED Flashlight Last? • Or • The effect of number of winds on the charge of a Wind-up LED flashlight. • The Title should go up at the top of your poster

6. Science Fair Posters • Claimssectionis so that you can spark interest in your experiment. It should include: • background information. • Your Hypothesis

7. Science Fair Posters • Background Information. • What information did you need to learn in order to understand your experiment? • What info does your audience need to know to understand your project? • What made you interested in the experiment

8. Background Info What did you need to know to perform this experiment What does your audience need to know to understand your experiment What made you interested in this project • ________________ • ________________ • ________________ • ________________ • ________________ • ________________ • ________________ • ________________ • ________________ • ________________ • ________________ • ________________

9. Claims • Claims • Wind up flashlights are becoming more popular as people are becoming more and more “Green.” These flashlights do not require you to change batteries that would end up as garbage in landfills. Instead the crank flashlights use a rechargeable coin sized Lithium Ion battery that can be charged over and over again by turning the flashlights crank. In addition, over the life time of the device, these new types of flashlights can be much less expensive than traditional battery flashlights. • The Light Emitting Diodes (LED) of the flashlight are small lights that produce little or no heat and require very little energy. LED’s lights have replaced the incandescent lights in traffic lights saving the City millions of dollars a year in energy costs. The technology of these flashlights, however, has a long way to go. The light produced is not as bright and typically do not last as long as battery operated flashlights do. • I was interested in seeing how long a crank flashlight worked and if the length of the charge depended on how many times the crank was wound and the number of lights illuminated

10. Hypothesis • Your Hypothesis • If I do this _____________ then __________ will happen because ________________. • The hypothesis is a guess as to what is going to happen in your experiment. • If the length of charge depends on how many times the crank is wound then the more I wind-up the flashlight the longer the light will stay on because the battery will have more power.

11. Science Fair Posters Materials: List all of the objects that you used in the experiment • Dynabrite wind-up Led Flashlight w/ 3 and 1 LED Modes • Stop watch or timer

12. Science Fair Posters Procedures • Completely drain flashlight’s battery. • Turn the flashlight’s crank (5, 10, 15, 20 or 40 times) • Turn the flashlight on to either the 1 or 3 LED mode • Simultaneously start the Stop watch • Observe the flashlight watching for the light to go out. • Stop the stop watch when the lights on the flashlight go completely out. • Record the time on your data table • Repeat the experiment for each of the number turns of crank

13. Science Fair Posters Results • The length of time that the Wind-up LED flashlight stayed on did increase with the number of times you wind up the crank. The number of lights running also varied the time and how many lights you keep running. There was an increase of about 2 and 4 min increase in the amount of time the lights stayed on when moving from 5 to 10 turns of the crank. One of the most interesting things is that after about 15 turns of the crank, the length of the charge did not seem to increase as much as it did when going from 5 to 10 turns and from 10 to 15 crank turns (see Figure 1 below). • When it comes to using the 1 LED mode of the flashlight, it used up much less energy then the 3 LED mode. As a result the lights were able to stay on for much longer in the 1 LED mode versus the 3 LED mode. • One important note that I must talk about is the fact that the times listed in the data table indicate the total time that the light was on. The flashlights lighting effectiveness ended long before the lights completely went completely out.

14. Results Figure 1. Flashlight illumination duration depending on number of cranks and number of lights turned on.

15. Science Fair Posters Conclusion: • What did you observe and what did you learn from it. • What suggestions or behavior • The conclusion is not about saying whether or not your hypothesis is correct. It is about sharing what you learned from your experiment.

16. Science Fair Posters Conclusion • As the result of the information collected in this experiment it seems like that optimal number of cranks for the Dynabrite Wind-up LED flashlight is some where between 15 and 20 cranks. Any less will only give you a nominal charge that will last only a few minutes. More than 20 cranks will not give much more times in terms of amount of time charged. LED flashlights are useful, but will function only for short periods of time before re-cranking is necessary again.

17. Science Fair Posters • Data tables: • Your poster should include some type of tables or graphs that give your auudience a view into all of your observations and measurements

18. How Long Does the Charge of a Wind-Up LED Flashlight Last • Record the time on your data table • Repeat the experiment for each of the number of crank turns • Results • The length of time that the Wind-up LED flashlight stays on may depend how much you wind it up and how many lights you keep running. There was an increase of about 2 and 4 min increase in the amount of time the lights stayed on when moving from 5 to 15 turns of the crank. One of the most interesting things that I observed was after about 15 turns of the crank, the length of the charge did not seem to increase as much as it did when going from 5 to 10 turns and from 10 to 15 turns crank of the crank. (see Figure 1 below). • When it comes to using the 1 LED mode of the flashlight, it used up much less energy then the 3 LED mode. As a result the lights were able to stay on for much longer in the 1 LED mode versus the 3 LED mode. • One important note that I must mention is the fact that the times listed in the data table indicate the total time that the light was on. The flashlights lighting effectiveness ended long before the lights completely went completely out. • Conclusion • As a result of the information collected in this experiment it seems like the optimal number of cranks for the Dynabrite Wind-up LED flashlight is some where between 15 and 20 turns of the crank. Turning the flashlights crank less than15 times will give you a charge that will last only a few minutes. Turning the crank more than 20 cranks did not provide the expected doubling of charge change seen when going from 5 to 10 or 10 to 15 turns of the crank. • LED flashlights are useful, but will function only for short periods of time before re-cranking becomes necessary. Another concern that I have concerning these hand cranks is the lithium ion rechargable battery. It has been suggested that if left to completely uncharge, the battery can loose its ability to accept a recharge. I would suggest that if you are looking for a Crank LED Flashlight that you get a really good one, that you would keep in an emergency kit, but wind up the crank once a month to keep the battery from completely draining. • Claims • Wind up flashlights are becoming more popular as people are becoming more and more “Green.” These flashlights do not require you to change batteries that would end up as garbage in our landfills. In stead the the crank flashlights use a rechargeable coin sized Lithium Ion battery that can be charged over and over again by turning the crank. In addition, over the life time of the flashlight these new types of flashlights can be much less expensive than traditional battery flashlights. • The Light Emitting Diodes (LED) of the flashlight are small lights that produce little or no heat and require very little energy. LED’s lights have replaced the incandescent lights in traffic lights saving the City millions of dollars a year in energy costs. The technology of these flashlights, however, has a long way to go. The light produced are not as bright and typically do not last as long as battery operated flashlights do. • I was interested in seeing how long a crank flashlight worked and if the length of the charge depended on how many times the crank was wound and the number of lights illuminated • Materials • Dynabrite wind-up Led Flashlight w/ 3 and 1 LED Modes • Stop watch or timer • Procedures • Start with a completely drained flashlight • Wind the flashlight 5, 10, 15, 0r 20 times • Turn the flashlight on to the 3 LED or 1 LED light mode • Simultaneously start the Stop watch • Stop the stop watch when the lights on the flashlight go completely out. Figure 1.

19. T i t l e Procedures Claims Background Info Hypothesis Results Results Graphs Tables Materials Conclusion Pictures Pictures Pictures Procedures

20. How Long Does the Charge of a Wind-Up LED Flashlight Last Results The length of time that the Wind-up LED flashlight stays on may depend how much you wind it up and how many lights you keep running. There was an increase of about 2 and 4 min increase in the amount of time the lights stayed on when moving from 5 to 15 turns of the crank. One of the most interesting things that I observed was after about 15 turns of the crank, the length of the charge did not seem to increase as much as it did when going from 5 to 10 turns and from 10 to 15 turns crank of the crank. (see Figure 1 below). When it comes to using the 1 LED mode of the flashlight, it used up much less energy then the 3 LED mode. As a result the lights were able to stay on for much longer in the 1 LED mode versus the 3 LED mode. One important note that I must mention is the fact that the times listed in the data table indicate the total time that the light was on. The flashlights lighting effectiveness ended long before the lights completely went completely out. Claims Wind up flashlights are becoming more popular as people are becoming more and more “Green.” These flashlights do not require you to change batteries that would end up as garbage in our landfills. In stead the the crank flashlights use a rechargeable coin sized Lithium Ion battery that can be charged over and over again by turning the crank. In addition, over the life time of the flashlight these new types of flashlights can be much less expensive than traditional battery flashlights. The Light Emitting Diodes (LED) of the flashlight are small lights that produce little or no heat and require very little energy. LED’s lights have replaced the incandescent lights in traffic lights saving the City millions of dollars a year in energy costs. The technology of these flashlights, however, has a long way to go. The light produced are not as bright and typically do not last as long as battery operated flashlights do Hypothesis I was interested in seeing how long a crank flashlight worked and if the length of the charge depended on how many times the crank was wound and the number of lights illuminated Conclusion As a result of the information collected in this experiment it seems like the optimal number of cranks for the Dynabrite Wind-up LED flashlight is some where between 15 and 20 turns of the crank. Turning the flashlights crank less than15 times will give you a charge that will last only a few minutes. Turning the crank more than 20 cranks did not provide the expected doubling of charge change seen when going from 5 to 10 or 10 to 15 turns of the crank. LED flashlights are useful, but will function only for short periods of time before re-cranking becomes necessary. Another concern that I have concerning these hand cranks is the lithium ion rechargable battery. It has been suggested that if left to completely uncharge, the battery can loose its ability to accept a recharge. I would suggest that if you are looking for a Crank LED Flashlight that you get a really good one, that you would keep in an emergency kit, but wind up the crank once a month to keep the battery from completely draining. • Materials • Dynabrite wind-up Led Flashlight w/ 3 and 1 LED Modes • Stop watch or timer • Procedures • Start with a completely drained flashlight • Wind the flashlight 5, 10, 15, 0r 20 times • Turn the flashlight on to the 3 LED or 1 LED light mode • Simultaneously start the Stop watch • Stop the stop watch when the lights on the flashlight go completely out.