1 00:00:00,000 --> 00:00:03,000 Hi, Dr. D. It looks like you fixed things up around here. 2 00:00:03,000 --> 00:00:04,000 Hey, Geronimo. 3 00:00:04,000 --> 00:00:05,000 Hey, Bernie. 4 00:00:05,000 --> 00:00:06,000 Hi, Bernie. 5 00:00:06,000 --> 00:00:08,000 You two look a lot happier than when I saw you last. 6 00:00:08,000 --> 00:00:10,000 Don't they, Geronimo and Bernie? 7 00:00:10,000 --> 00:00:11,000 We feel better now. 8 00:00:11,000 --> 00:00:14,000 We might be getting closer to finding the stink. 9 00:00:14,000 --> 00:00:15,000 Guess what? 10 00:00:15,000 --> 00:00:19,000 We have an idea on how stink travels to the different cities. 11 00:00:19,000 --> 00:00:22,000 We stood in a circle and sprayed something into the air. 12 00:00:22,000 --> 00:00:26,000 And it reached our noses in exactly the same amount of time. 13 00:00:26,000 --> 00:00:30,000 So, maybe the cities are located an equal distance apart from the stink. 14 00:00:30,000 --> 00:00:32,000 What do you think of that, Dr. D.? 15 00:00:32,000 --> 00:00:33,000 Pretty cool, huh? 16 00:00:33,000 --> 00:00:34,000 Whoa, whoa, guys. 17 00:00:34,000 --> 00:00:35,000 Hold on. 18 00:00:35,000 --> 00:00:37,000 You might be getting a little ahead of yourselves. 19 00:00:37,000 --> 00:00:40,000 First of all, have you been careful at how you've experimented? 20 00:00:40,000 --> 00:00:42,000 We think so. 21 00:00:42,000 --> 00:00:44,000 You're saying an equal distance apart? 22 00:00:44,000 --> 00:00:46,000 Is there anything else in the clubhouse that smells? 23 00:00:46,000 --> 00:00:49,000 Well... 24 00:00:49,000 --> 00:00:53,000 The big question is, have you been careful to keep everything the same? 25 00:00:53,000 --> 00:00:55,000 What are you talking about? 26 00:00:55,000 --> 00:00:57,000 Think about your experiment carefully. 27 00:00:57,000 --> 00:01:03,000 Remember, you must plan it and not simply jump into it feet first. 28 00:01:03,000 --> 00:01:05,000 You've only tested this on the three of you. 29 00:01:05,000 --> 00:01:07,000 This is not a true sampling. 30 00:01:07,000 --> 00:01:09,000 You need to test it on a larger group. 31 00:01:09,000 --> 00:01:11,000 Everyone's sense of smell is different. 32 00:01:11,000 --> 00:01:14,000 We know Bernie has the best nose in town. 33 00:01:14,000 --> 00:01:16,000 What about you, Geronimo? 34 00:01:16,000 --> 00:01:17,000 You're right. 35 00:01:17,000 --> 00:01:18,000 Bernie's got a great sniffer. 36 00:01:18,000 --> 00:01:20,000 By getting back to your experiment, 37 00:01:20,000 --> 00:01:25,000 more people will give you a truer picture of what you're looking at in your experiment. 38 00:01:25,000 --> 00:01:28,000 Well, we could test this on our friends at school. 39 00:01:28,000 --> 00:01:31,000 We have a lot of different sets of noses in our class. 40 00:01:31,000 --> 00:01:32,000 Let's go to school. 41 00:01:32,000 --> 00:01:33,000 This will be great. 42 00:01:33,000 --> 00:01:38,000 Thanks, Dr. D. 43 00:01:38,000 --> 00:01:39,000 This is great. 44 00:01:39,000 --> 00:01:41,000 We have enough kids to pull this off. 45 00:01:41,000 --> 00:01:44,000 We need to divide the class into groups of two. 46 00:01:44,000 --> 00:01:45,000 Excuse me. 47 00:01:45,000 --> 00:01:46,000 Excuse me. 48 00:01:46,000 --> 00:01:48,000 I have an idea. 49 00:01:48,000 --> 00:01:50,000 One group could actually do the experiment, 50 00:01:50,000 --> 00:01:53,000 and the other group could time and record the data. 51 00:01:53,000 --> 00:01:55,000 Here are your stopwatches. 52 00:01:55,000 --> 00:01:57,000 Okay, let's get to it. 53 00:01:57,000 --> 00:01:59,000 You all need to stand in a circle. 54 00:01:59,000 --> 00:02:03,000 Everyone two meters from me and one meter from each other. 55 00:02:03,000 --> 00:02:04,000 Here's a meter stick. 56 00:02:04,000 --> 00:02:05,000 I'll be the measuring man. 57 00:02:05,000 --> 00:02:09,000 All you sniffers need to pair up with somebody with a stopwatch. 58 00:02:09,000 --> 00:02:11,000 And recorders, stand by. 59 00:02:11,000 --> 00:02:12,000 That looks good. 60 00:02:12,000 --> 00:02:13,000 Does it look good, Mrs. Mazzitis? 61 00:02:13,000 --> 00:02:15,000 It looks very good. 62 00:02:15,000 --> 00:02:17,000 I'll stand in the middle, and I'll spray the spray. 63 00:02:17,000 --> 00:02:19,000 When you smell it, raise your hand, 64 00:02:19,000 --> 00:02:22,000 and your partner will push the stopwatch. 65 00:02:22,000 --> 00:02:41,000 Okay, let's go start the experiment. 66 00:02:41,000 --> 00:02:44,000 Okay, recorders, what were your results? 67 00:02:44,000 --> 00:02:45,000 I got 7. 68 00:02:45,000 --> 00:02:46,000 14. 69 00:02:46,000 --> 00:02:48,000 I have 15. 70 00:02:48,000 --> 00:02:50,000 This is really strange. 71 00:02:50,000 --> 00:02:51,000 Really strange. 72 00:02:51,000 --> 00:02:53,000 I thought the results would be the same. 73 00:02:53,000 --> 00:02:55,000 I can't believe these numbers are different. 74 00:02:55,000 --> 00:02:57,000 They're all different. 75 00:02:57,000 --> 00:03:00,000 I guess science isn't all that predictable. 76 00:03:00,000 --> 00:03:02,000 I expect it to be like our other experiment, 77 00:03:02,000 --> 00:03:05,000 where all the numbers were the same. 78 00:03:05,000 --> 00:03:06,000 What do we do now? 79 00:03:06,000 --> 00:03:09,000 I guess we go back and tell Dr. D. 80 00:03:09,000 --> 00:03:10,000 Bye, everyone. 81 00:03:10,000 --> 00:03:12,000 Thanks for all your help. 82 00:03:12,000 --> 00:03:14,000 Bye. 83 00:03:14,000 --> 00:03:15,000 Where is he? 84 00:03:15,000 --> 00:03:16,000 Hello. 85 00:03:16,000 --> 00:03:17,000 Dr. D., where are you? 86 00:03:17,000 --> 00:03:18,000 Hold on. 87 00:03:18,000 --> 00:03:19,000 Hold on. 88 00:03:19,000 --> 00:03:20,000 I'm right here. 89 00:03:20,000 --> 00:03:21,000 What's wrong? 90 00:03:21,000 --> 00:03:22,000 You sound a little anxious. 91 00:03:22,000 --> 00:03:23,000 You look a little windblown. 92 00:03:23,000 --> 00:03:25,000 Well, we thought we knew the answer. 93 00:03:25,000 --> 00:03:27,000 Our experiment at the tree house 94 00:03:27,000 --> 00:03:30,000 showed that snow moved at the same rate of speed. 95 00:03:30,000 --> 00:03:32,000 But at school, it sure was different. 96 00:03:32,000 --> 00:03:34,000 Let's talk about the test conditions. 97 00:03:34,000 --> 00:03:35,000 Were they all the same? 98 00:03:35,000 --> 00:03:37,000 Well, the windows were shut, 99 00:03:37,000 --> 00:03:40,000 and the fans and A.C. were both off. 100 00:03:40,000 --> 00:03:41,000 I was the measure man. 101 00:03:41,000 --> 00:03:43,000 I know all our friends. 102 00:03:43,000 --> 00:03:46,000 Why were they standing equal distance from each other? 103 00:03:46,000 --> 00:03:47,000 I have an idea. 104 00:03:47,000 --> 00:03:50,000 Did you watch everyone and how they smelled the air spray? 105 00:03:50,000 --> 00:03:54,000 Did they breathe normally or take a big sniff like this? 106 00:03:54,000 --> 00:03:56,000 I know George had a cold. 107 00:03:56,000 --> 00:03:58,000 You can't always control the situation. 108 00:03:58,000 --> 00:04:00,000 There might be variations in sensitivity 109 00:04:00,000 --> 00:04:02,000 or how your friends smelled the air spray. 110 00:04:02,000 --> 00:04:04,000 Look at the data you've collected. 111 00:04:04,000 --> 00:04:06,000 We may want to ignore the 45 and the 20, 112 00:04:06,000 --> 00:04:07,000 because as you can see, 113 00:04:07,000 --> 00:04:10,000 they're pretty far away from the other numbers in the group. 114 00:04:10,000 --> 00:04:12,000 These numbers can be mistakes in measuring 115 00:04:12,000 --> 00:04:13,000 and might be misleading 116 00:04:13,000 --> 00:04:15,000 when you're trying to make sense of your data. 117 00:04:15,000 --> 00:04:17,000 If we look at the rest of the numbers, 118 00:04:17,000 --> 00:04:18,000 they are very close, 119 00:04:18,000 --> 00:04:21,000 but not the same because of variations like George's cold. 120 00:04:21,000 --> 00:04:24,000 So, basically, we were right. 121 00:04:24,000 --> 00:04:26,000 Smell does travel at the same rate of speed, 122 00:04:26,000 --> 00:04:29,000 but different things influence it. 123 00:04:29,000 --> 00:04:33,000 Do certain things make smells move faster or slower? 124 00:04:33,000 --> 00:04:35,000 I think you need to do some more investigating. 125 00:04:35,000 --> 00:04:36,000 We know! 126 00:04:36,000 --> 00:04:39,000 And more investigating. 127 00:04:39,000 --> 00:04:42,000 We're never going to get on KSNN. 128 00:04:42,000 --> 00:04:45,000 Hmm, what's that noise? 129 00:04:45,000 --> 00:04:46,000 Oh, it's just the wind blowing. 130 00:04:46,000 --> 00:04:48,000 It's nasty outside. 131 00:04:48,000 --> 00:04:50,000 Hmm, I wonder. 132 00:04:50,000 --> 00:04:52,000 Could this be one of our variables? 133 00:04:52,000 --> 00:04:53,000 It could be. 134 00:04:53,000 --> 00:04:56,000 I think you three need to do some more experimenting. 135 00:04:56,000 --> 00:04:59,000 I have a gut feeling this could be the answer. 136 00:04:59,000 --> 00:05:01,000 You may be right. 137 00:05:01,000 --> 00:05:02,000 You have a lot of guts. 138 00:05:02,000 --> 00:05:03,000 I do not. 139 00:05:03,000 --> 00:05:04,000 Too so! 140 00:05:04,000 --> 00:05:06,000 Whatever!