1 00:00:00,000 --> 00:00:08,000 Hi, my name is Erica Hartley from Mr. Mark Bumita's third grade class in Riverside, Ohio. 2 00:00:08,000 --> 00:00:17,000 We are proud to be an AIAA school, which stands for American Institute of Aeronautics and Astronautics. 3 00:00:17,000 --> 00:00:21,000 We need your help. Can you tell us about your experiment on reflective surfaces? 4 00:00:21,000 --> 00:00:29,000 Sure. We started off with the problem. We needed to find the most visible material for bike safety at night. 5 00:00:29,000 --> 00:00:32,000 That's so funny. We have the same problem. What did you do? 6 00:00:32,000 --> 00:00:37,000 We did a fun experiment. It's really easy. We tested four items. 7 00:00:37,000 --> 00:00:44,000 A five centimeter by ten centimeter piece of white poster board with fluorescent paint, 8 00:00:44,000 --> 00:00:51,000 a glow stick, a neon pink poster board strip, and a reflective sticker. 9 00:00:51,000 --> 00:00:56,000 I've seen this experiment before. First you start by taking a piece of clay and dividing it into four equal parts. 10 00:00:56,000 --> 00:00:59,000 Then you take the clay and roll it into small balls. 11 00:00:59,000 --> 00:01:04,000 And then you set the balls on the table in a straight line about eight centimeters apart. 12 00:01:04,000 --> 00:01:08,000 Then you take each test item and insert it into the balls of clay. 13 00:01:08,000 --> 00:01:10,000 How did you do the test? 14 00:01:10,000 --> 00:01:16,000 It's easy. Shine a beam of light on the first item and observe. 15 00:01:16,000 --> 00:01:20,000 Then record your observations on your data sheet. 16 00:01:21,000 --> 00:01:26,000 After you conduct the experiment, give each item a safety rating. 17 00:01:26,000 --> 00:01:33,000 Number one stands for poor visibility and number five means the item is very visible at night. 18 00:01:33,000 --> 00:01:37,000 Did you find out which items work best for bike safety at night? 19 00:01:37,000 --> 00:01:42,000 Yes. We came up with several findings from our data chart. 20 00:01:42,000 --> 00:01:50,000 We found the neon pink paper, like this one here, is noticeable, but it doesn't reflect light. 21 00:01:50,000 --> 00:01:57,000 The glow stick produced its own light and was really visible, but it can only last for so long. 22 00:01:57,000 --> 00:02:03,000 Yeah, the glow sticks only work for ten hours and it only gives off light. It doesn't reflect it. 23 00:02:03,000 --> 00:02:07,000 The fluorescent paint doesn't really glow at all. 24 00:02:07,000 --> 00:02:15,000 Our top score is the reflective sticker. It reflects light well and it's good for night visibility. 25 00:02:15,000 --> 00:02:17,000 We hope this helps you. 26 00:02:17,000 --> 00:02:19,000 Bye!