1
00:00:05,200 --> 00:00:10,000
(MUSIC)

2
00:00:10,434 --> 00:00:11,367
JOAN CARTAN-HANSEN: HI, I'M JOAN

3
00:00:11,367 --> 00:00:12,167
CARTAN-HANSEN.

4
00:00:12,167 --> 00:00:13,434
AND WELCOME TO SCIENCE TREK: THE

5
00:00:13,434 --> 00:00:14,534
WEB SHOW .

6
00:00:14,534 --> 00:00:15,667
AND WELCOME TO THE DISCOVERY

7
00:00:15,667 --> 00:00:16,834
CENTER OF IDAHO.

8
00:00:16,834 --> 00:00:17,901
JOINING US TODAY TO ANSWER YOUR

9
00:00:17,901 --> 00:00:19,033
QUESTIONS ABOUT FORCE AND MOTION

10
00:00:19,033 --> 00:00:20,200
ARE KATHRYN DEVINE, ASSOCIATE

11
00:00:20,200 --> 00:00:21,234
PROFESSOR OF PHYSICS AT THE

12
00:00:21,234 --> 00:00:22,467
COLLEGE OF IDAHO, AND JOHN

13
00:00:22,467 --> 00:00:23,567
GARDNER, PROFESSOR OF MECHANICAL

14
00:00:23,567 --> 00:00:25,200
AND BIOMEDICAL ENGINEERING AT

15
00:00:25,200 --> 00:00:27,067
BOISE STATE UNIVERSITY.

16
00:00:27,067 --> 00:00:28,734
THANKS FOR BEING HERE.

17
00:00:28,734 --> 00:00:29,534
KATHRYN DEVINE: THANKS FOR

18
00:00:29,534 --> 00:00:30,267
HAVING US.

19
00:00:30,267 --> 00:00:31,234
JOHN GARDNER: THANK YOU.

20
00:00:31,234 --> 00:00:32,267
CARTAN-HANSEN: OKAY, LET'S GO TO

21
00:00:32,267 --> 00:00:33,300
YOUR QUESTIONS.

22
00:00:34,167 --> 00:00:37,133
(MUSIC)

23
00:00:37,767 --> 00:00:38,601
RYDER: HI, MY NAME IS

24
00:00:38,601 --> 00:00:40,234
RYDER, AND I GO TO OWYHEE-HARBOR

25
00:00:40,234 --> 00:00:41,834
ELEMENTARY SCHOOL.

26
00:00:41,834 --> 00:00:43,601
AND MY QUESTION IS WHAT IS FORCE

27
00:00:43,601 --> 00:00:47,133
AND MOTION?

28
00:00:47,133 --> 00:00:48,167
GARDNER: FORCE AND MOTION ARE

29
00:00:48,167 --> 00:00:50,200
PART OF A FAMILY OF CONCEPTS

30
00:00:50,200 --> 00:00:54,667
THAT HELP US UNDERSTAND JUST THE

31
00:00:54,667 --> 00:00:56,968
BASICS OF THE WORLD AROUND US,

32
00:00:56,968 --> 00:00:58,167
LIKE DISTANCE AND VELOCITY AND

33
00:00:58,167 --> 00:01:00,167
TEMPERATURE.

34
00:01:00,167 --> 00:01:01,400
AND "FORCE" IS THE WORD WE USE

35
00:01:01,400 --> 00:01:03,734
TO DESCRIBE A PUSHING OR PULLING

36
00:01:03,734 --> 00:01:05,367
ALONG A LINE OF ACTION, ALONG A

37
00:01:05,367 --> 00:01:06,701
CERTAIN LINE.

38
00:01:06,701 --> 00:01:08,100
AND "MOTION" IS THE RESULT OFF

39
00:01:08,100 --> 00:01:11,400
OF THE RESULT OF A FORCE.

40
00:01:11,400 --> 00:01:12,801
IT'S A BODY THAT CAN MOVE OR

41
00:01:12,801 --> 00:01:15,200
THAT MOVES BECAUSE YOU'VE PUSHED

42
00:01:15,200 --> 00:01:16,701
ON IT.

43
00:01:16,701 --> 00:01:18,234
OR IT CONTINUES TO MOVE BECAUSE

44
00:01:18,234 --> 00:01:20,367
NOTHING ELSE IS PULLING IT BACK.

45
00:01:21,334 --> 00:01:22,334
CARTAN-HANSEN: MICHAEL WOULD

46
00:01:22,334 --> 00:01:23,501
LIKE TO KNOW: HOW DOES FORCE

47
00:01:23,501 --> 00:01:26,634
PULL THINGS DOWN INSTEAD OF UP?

48
00:01:27,567 --> 00:01:28,534
DEVINE: WELL, IT DEPENDS ON THE

49
00:01:28,534 --> 00:01:29,834
FORCE.

50
00:01:29,834 --> 00:01:30,801
THE FORCE THAT MICHAEL'S

51
00:01:30,801 --> 00:01:31,834
PROBABLY THINKING ABOUT IS THE

52
00:01:31,834 --> 00:01:32,934
FORCE OF GRAVITY, WHICH IF YOU

53
00:01:32,934 --> 00:01:34,000
KNOCK SOMETHING OFF THE TABLE,

54
00:01:34,000 --> 00:01:35,534
IT GETS PULLED DOWN.

55
00:01:35,534 --> 00:01:36,634
BUT THERE ARE A LOT OF FORCES

56
00:01:36,634 --> 00:01:37,767
THAT PULL THINGS UP RATHER THAN

57
00:01:37,767 --> 00:01:39,033
DOWN.

58
00:01:39,033 --> 00:01:40,567
IF YOU'RE IN AN AIRPLANE, THEN

59
00:01:40,567 --> 00:01:41,567
THERE'S THE LIFT FORCE FROM THE

60
00:01:41,567 --> 00:01:42,567
WINGS PUSHING YOU UP, AND THAT'S

61
00:01:42,567 --> 00:01:44,234
WHY YOU GO OFF THE GROUND.

62
00:01:44,234 --> 00:01:45,267
IF YOU PICK YOUR COFFEE MUG UP

63
00:01:45,267 --> 00:01:46,767
OFF A TABLE AND HAVE A SIP, THEN

64
00:01:46,767 --> 00:01:50,100
YOUR ARM IS EXERTING A FORCE, A

65
00:01:50,100 --> 00:01:50,901
PULL ON THE MUG THAT CAUSES THE

66
00:01:50,901 --> 00:01:52,567
MUG TO GO UP.

67
00:01:52,567 --> 00:01:54,300
AND SO FORCES CAN PULL IN ANY

68
00:01:54,300 --> 00:01:55,100
DIRECTION.

69
00:01:55,100 --> 00:01:56,100
IT JUST DEPENDS ON THE TYPE OF

70
00:01:56,100 --> 00:01:57,467
FORCE.

71
00:01:57,467 --> 00:01:58,801
THE REASON GRAVITY PULLS THINGS

72
00:01:58,801 --> 00:02:00,234
DOWN IS BECAUSE WHAT WE

73
00:02:00,234 --> 00:02:01,367
EXPERIENCE AS GRAVITY IS BECAUSE

74
00:02:01,367 --> 00:02:02,667
THE PLANET EARTH HAS A LOT OF

75
00:02:02,667 --> 00:02:04,067
MASS, AND THAT MASS EXERTS A

76
00:02:04,067 --> 00:02:06,000
GRAVITATIONAL FORCE ON ALL OF

77
00:02:06,000 --> 00:02:07,734
THE OBJECTS ON IT.

78
00:02:07,734 --> 00:02:09,300
AND THE DIRECTION OF THAT FORCE

79
00:02:09,300 --> 00:02:10,601
IS TOWARDS THE CENTER OF EARTH,

80
00:02:10,601 --> 00:02:12,434
WHICH WE CONSIDER DOWN.

81
00:02:13,334 --> 00:02:14,734
CONNOR: HI, MY NAME IS CONNOR,

82
00:02:14,734 --> 00:02:16,200
AND I GO TO KAMIAH ELEMENTARY

83
00:02:16,200 --> 00:02:18,334
SCHOOL IN KAMIAH, IDAHO.

84
00:02:18,334 --> 00:02:20,000
MY QUESTION IS HOW MUCH FORCE

85
00:02:20,000 --> 00:02:21,200
WOULD IT TAKE TO MOVE A 13-TON

86
00:02:21,200 --> 00:02:23,601
TRAIN?

87
00:02:24,234 --> 00:02:25,234
DEVINE: SO THE ANSWER TO THAT

88
00:02:25,234 --> 00:02:26,467
ONE IS IT DEPENDS ON HOW YOU

89
00:02:26,467 --> 00:02:28,734
WANT TO MOVE THE OBJECT.

90
00:02:28,734 --> 00:02:30,100
AND SO IF YOU HAVE A 13-TON

91
00:02:30,100 --> 00:02:31,400
OBJECT AND YOU JUST WANT TO MOVE

92
00:02:31,400 --> 00:02:32,601
IT A LITTLE BIT, YOU DON'T WANT

93
00:02:32,601 --> 00:02:33,868
TO SPEED IT UP, THEN IT'S NOT

94
00:02:33,868 --> 00:02:34,934
GOING TO TAKE AS MUCH FORCE AS

95
00:02:34,934 --> 00:02:36,701
IF YOU WANTED TO MAKE IT, SAY,

96
00:02:36,701 --> 00:02:38,968
ACCELERATE AT THE RATE OF A

97
00:02:38,968 --> 00:02:40,267
ROCKET SHIP OR SOMETHING.

98
00:02:40,267 --> 00:02:43,734
SO IF YOU HAVE A LOT OF MASS AND

99
00:02:43,734 --> 00:02:46,367
YOU WANT TO MAKE IT ACCELERATE,

100
00:02:46,367 --> 00:02:47,534
THE AMOUNT OF FORCE YOU USE

101
00:02:47,534 --> 00:02:50,367
DEPENDS ON THE ACCELERATION.

102
00:02:50,367 --> 00:02:51,701
AND THAT'S NEWTON'S SECOND LAW,

103
00:02:51,701 --> 00:02:52,767
FORCE EQUALS MASS TIMES

104
00:02:52,767 --> 00:02:54,234
ACCELERATION.

105
00:02:54,234 --> 00:02:55,367
IT DEPENDS ON THE MASS, BUT IT

106
00:02:55,367 --> 00:02:56,367
ALSO DEPENDS ON THE

107
00:02:56,367 --> 00:02:57,367
ACCELERATION, HOW MUCH YOU WANT

108
00:02:57,367 --> 00:02:58,501
TO SPEED OR SLOW DOWN THAT

109
00:02:58,501 --> 00:03:00,133
OBJECT.

110
00:03:00,133 --> 00:03:01,300
GARDNER: THIS IS AN OPPORTUNITY

111
00:03:01,300 --> 00:03:02,434
TO TALK ABOUT FRICTION, AS WELL.

112
00:03:02,434 --> 00:03:03,734
SO A REALLY BIG, MASSIVE OBJECT

113
00:03:03,734 --> 00:03:06,167
FLOATING IN SPACE NO MATTER HOW

114
00:03:06,167 --> 00:03:07,200
LITTLE YOU PUSH ON IT, IT WILL

115
00:03:07,200 --> 00:03:08,901
MOVE BECAUSE THERE'S NO OTHER

116
00:03:08,901 --> 00:03:10,834
FORCES ACTING ON IT.

117
00:03:10,834 --> 00:03:12,334
IF IT'S SITTING ON THE SURFACE

118
00:03:12,334 --> 00:03:13,267
OF THE EARTH, YOU KNOW, WHETHER

119
00:03:13,267 --> 00:03:14,934
IT'S ON A PARKING LOT OR ON A

120
00:03:14,934 --> 00:03:17,300
ROAD, THERE'S A LOT OF FRICTION

121
00:03:17,300 --> 00:03:20,200
BETWEEN -- AS WE TALKED ABOUT

122
00:03:20,200 --> 00:03:21,334
EARLIER -- A LOT OF FRICTION

123
00:03:21,334 --> 00:03:22,501
BETWEEN THAT BODY AND THE

124
00:03:22,501 --> 00:03:24,868
SURFACE.

125
00:03:24,868 --> 00:03:26,300
AND SO TO GET IT TO MOVE, YOU

126
00:03:26,300 --> 00:03:27,701
HAVE TO OVERCOME THAT FRICTION

127
00:03:27,701 --> 00:03:29,100
FORCE.

128
00:03:29,100 --> 00:03:30,567
AND DEPENDING ON WHAT THOSE

129
00:03:30,567 --> 00:03:31,901
SURFACES LOOK LIKE AND HOW BIG

130
00:03:31,901 --> 00:03:33,167
THE OBJECT IS, THAT FRICTION

131
00:03:33,167 --> 00:03:36,467
FORCE CAN BE BIGGER OR SMALLER.

132
00:03:36,467 --> 00:03:37,934
BUT IT IS RELATED TO THE WEIGHT

133
00:03:37,934 --> 00:03:39,300
OF THE OBJECT.

134
00:03:39,300 --> 00:03:40,634
SO A 13-TON OBJECT IS GOING TO

135
00:03:40,634 --> 00:03:41,901
HAVE A LOT OF FRICTION THAT YOU

136
00:03:41,901 --> 00:03:43,067
HAVE TO OVERCOME BEFORE YOU CAN

137
00:03:43,067 --> 00:03:45,133
GET IT TO MOVE.

138
00:03:45,133 --> 00:03:46,467
NICOLE: HI, MY NAME IS NICOLE,

139
00:03:46,467 --> 00:03:48,067
AND I GO TO OWYHEE-HARBOR

140
00:03:48,067 --> 00:03:49,767
ELEMENTARY SCHOOL.

141
00:03:49,767 --> 00:03:51,100
AND MY QUESTION IS HOW DO

142
00:03:51,100 --> 00:03:54,534
ASTEROIDS MOVE THROUGH SPACE?

143
00:03:54,534 --> 00:03:55,701
DEVINE: ASTEROIDS ARE REALLY

144
00:03:55,701 --> 00:03:56,901
INTERESTING.

145
00:03:56,901 --> 00:03:58,234
MOST OF THE ASTEROIDS IN OUR

146
00:03:58,234 --> 00:03:59,601
SOLAR SYSTEM EXIST IN WHAT WE

147
00:03:59,601 --> 00:04:00,767
CALL THE ASTEROID BELT, LOCATED

148
00:04:00,767 --> 00:04:02,767
BETWEEN MARS AND JUPITER.

149
00:04:02,767 --> 00:04:03,834
AND WE THINK THAT THOSE

150
00:04:03,834 --> 00:04:05,300
ASTEROIDS ARE PROBABLY THE

151
00:04:05,300 --> 00:04:06,434
START, THE BUILDING BLOCKS OF

152
00:04:06,434 --> 00:04:07,400
PLANETS, FROM VERY EARLY IN OUR

153
00:04:07,400 --> 00:04:09,100
SOLAR SYSTEM, THAT WERE WEREN'T

154
00:04:09,100 --> 00:04:10,968
ABLE TO GROUP TOGETHER THROUGH

155
00:04:10,968 --> 00:04:12,601
GRAVITY BECAUSE THEY WERE BEING

156
00:04:12,601 --> 00:04:15,100
DISRUPTED BY JUPITER, THIS

157
00:04:15,100 --> 00:04:16,200
REALLY BIG PLANET NEARBY WHOSE

158
00:04:16,200 --> 00:04:17,801
GRAVITATIONAL FIELD WAS KEEPING

159
00:04:17,801 --> 00:04:19,367
THOSE LITTLE POSSIBLE BUILDING

160
00:04:19,367 --> 00:04:21,133
BLOCKS OF A PLANET FROM FORMING

161
00:04:21,133 --> 00:04:23,334
TOGETHER UNDER GRAVITY.

162
00:04:23,334 --> 00:04:24,501
THAT SAID, THOUGH, HOW DO THEY

163
00:04:24,501 --> 00:04:25,701
MOVE, WELL, THEY ORBIT AROUND

164
00:04:25,701 --> 00:04:27,000
THE SUN, JUST LIKE ANY OTHER

165
00:04:27,000 --> 00:04:28,367
PLANET.

166
00:04:28,367 --> 00:04:29,701
AND SO THEY'RE ORBITING AROUND

167
00:04:29,701 --> 00:04:30,801
THE SUN.

168
00:04:30,801 --> 00:04:31,934
THEIR ORBITS TEND TO BE MAYBE A

169
00:04:31,934 --> 00:04:33,033
LITTLE BIT LESS CIRCULAR THAN

170
00:04:33,033 --> 00:04:34,067
SOME OF THE PLANETS, AND SO

171
00:04:34,067 --> 00:04:35,234
THERE ARE CERTAIN GROUPS OF

172
00:04:35,234 --> 00:04:36,367
ASTEROIDS THAT HAVE ELLIPTICAL

173
00:04:36,367 --> 00:04:37,968
ORBITS, WHICH MEANS MORE LIKE AN

174
00:04:37,968 --> 00:04:40,067
OVAL THAN A CIRCLE.

175
00:04:40,067 --> 00:04:41,133
AND THOSE ARE THE ONES THAT TEND

176
00:04:41,133 --> 00:04:42,200
TO BE A LITTLE BIT MORE

177
00:04:42,200 --> 00:04:43,367
INTERESTING TO US HERE ON EARTH,

178
00:04:43,367 --> 00:04:44,467
BECAUSE IF THEY'RE MOVING RATHER

179
00:04:44,467 --> 00:04:45,667
THAN IN A PERFECT CIRCLE, BUT IN

180
00:04:45,667 --> 00:04:47,200
AN OVAL, THAT HAS A POTENTIAL,

181
00:04:47,200 --> 00:04:48,200
THEN, FOR THEIR ORBIT

182
00:04:48,200 --> 00:04:49,667
INTERSECTING OURS.

183
00:04:49,667 --> 00:04:50,868
AND SO THOSE ARE THE ONES THAT

184
00:04:50,868 --> 00:04:52,167
GET CLOSE ENOUGH THAT WE CAN

185
00:04:52,167 --> 00:04:53,567
SOMETIMES SEE THEM CRASH INTO

186
00:04:53,567 --> 00:04:55,167
OUR ATMOSPHERE, LIKE WE DID OF

187
00:04:55,167 --> 00:04:56,601
COUPLE YEARS AGO IN RUSSIA,

188
00:04:56,601 --> 00:04:57,701
WHERE IT CAUSED THAT BIG

189
00:04:57,701 --> 00:04:58,868
EXPLOSION ABOVE A RUSSIAN TOWN.

190
00:04:58,868 --> 00:05:00,901
AND SO GRAVITY KEEPS ASTEROIDS

191
00:05:00,901 --> 00:05:02,767
IN AN ORBIT AROUND THE SUN, AND

192
00:05:02,767 --> 00:05:05,033
THEY HAVE EITHER CIRCULAR ORBITS

193
00:05:05,033 --> 00:05:07,300
OR OVAL ORBITS, AND IT'S THE

194
00:05:07,300 --> 00:05:08,634
OVAL ONES THAT WE LIKE TO KEEP

195
00:05:08,634 --> 00:05:11,033
AN EYE ON.

196
00:05:11,033 --> 00:05:12,100
RUTH: HELLO, MY NAME IS RUTH,

197
00:05:12,100 --> 00:05:13,334
AND I'M FROM BASIN ELEMENTARY.

198
00:05:13,334 --> 00:05:14,434
THE QUESTION I WOULD LIKE TO ASK

199
00:05:14,434 --> 00:05:15,734
YOU IS IF THERE'S NO GRAVITY IN

200
00:05:15,734 --> 00:05:17,100
SPACE, CAN METEORS TRAVEL

201
00:05:17,100 --> 00:05:19,968
FOREVER?

202
00:05:19,968 --> 00:05:21,033
DEVINE: YES, METEORS COULD

203
00:05:21,033 --> 00:05:22,467
TRAVEL FOREVER.

204
00:05:22,467 --> 00:05:23,834
AND THIS IS GETTING BACK TO THE

205
00:05:23,834 --> 00:05:24,968
IDEA THAT AN OBJECT IN MOTION,

206
00:05:24,968 --> 00:05:26,167
LIKE A METEOR, WILL STAY IN

207
00:05:26,167 --> 00:05:27,567
MOTION FOREVER AND EVER UNLESS

208
00:05:27,567 --> 00:05:29,868
ACTED ON BY ANOTHER FORCE.

209
00:05:29,868 --> 00:05:31,200
AND SO IF THERE WERE NO GRAVITY

210
00:05:31,200 --> 00:05:32,567
AND NO OTHER FORCES, THEN THAT

211
00:05:32,567 --> 00:05:33,734
METEOR WOULD CONTINUE TRAVELING

212
00:05:33,734 --> 00:05:36,601
FOREVER.

213
00:05:36,601 --> 00:05:37,734
IF THERE WAS NO GRAVITY AND IT

214
00:05:37,734 --> 00:05:38,767
HIT SOMETHING, THEN THAT CONTACT

215
00:05:38,767 --> 00:05:39,834
FORCE WOULD BE ENOUGH TO STOP

216
00:05:39,834 --> 00:05:41,334
IT.

217
00:05:41,334 --> 00:05:42,467
SO IF THERE WERE OTHER FORCES TO

218
00:05:42,467 --> 00:05:43,501
BRING IT TO REST BESIDES

219
00:05:43,501 --> 00:05:44,300
GRAVITY, THEN MAYBE IT WOULD

220
00:05:44,300 --> 00:05:45,400
STOP.

221
00:05:45,400 --> 00:05:46,300
BUT IF NO FORCES ACT ON IT,

222
00:05:46,300 --> 00:05:47,434
THEN, YES, IT WOULD TRAVEL

223
00:05:47,434 --> 00:05:49,667
FOREVER.

224
00:05:50,334 --> 00:05:51,400
GARDNER: AND I THINK IT WOULD BE

225
00:05:51,400 --> 00:05:52,434
IMPORTANT TO REALIZE THAT EVEN

226
00:05:52,434 --> 00:05:53,501
IF THERE IS GRAVITY OUT THERE,

227
00:05:53,501 --> 00:05:54,734
AND THERE IS, AN ASTEROID AS IT

228
00:05:54,734 --> 00:05:57,033
NEARS ANOTHER MASS, ANOTHER

229
00:05:57,033 --> 00:05:58,334
PLANET OR A STAR, IT COULD MOVE

230
00:05:58,334 --> 00:06:00,334
ITS VELOCITY, BUT IT COULD KEEP

231
00:06:00,334 --> 00:06:01,434
TRAVELING.

232
00:06:01,434 --> 00:06:02,667
JUST BECAUSE IT'S EXPERIENCING

233
00:06:02,667 --> 00:06:03,767
FORCE DOESN'T MEAN IT'S GOING TO

234
00:06:03,767 --> 00:06:05,234
SLOW DOWN.

235
00:06:05,234 --> 00:06:07,033
REMEMBER, A FORCE CAN SPEED UP

236
00:06:07,033 --> 00:06:08,400
OR SLOW DOWN AND CAN ALSO CHANGE

237
00:06:08,400 --> 00:06:09,634
DIRECTION.

238
00:06:09,634 --> 00:06:10,901
AND SO WHAT, MORE THAN LIKELY,

239
00:06:10,901 --> 00:06:12,067
HAPPENS WITH AN ASTEROID OUT IN

240
00:06:12,067 --> 00:06:13,367
SPACE IS AS IT GETS NEAR A STAR,

241
00:06:13,367 --> 00:06:15,801
IT'S SHIFTING A LITTLE BIT, BUT

242
00:06:15,801 --> 00:06:17,267
IF IT'S TOO FAR AWAY, IT WON'T

243
00:06:17,267 --> 00:06:18,634
GET CAUGHT INTO AN ORBIT; IT

244
00:06:18,634 --> 00:06:19,801
WILL JUST MOVE INTO A DIFFERENT

245
00:06:19,801 --> 00:06:21,033
DIRECTION ON TO THE NEXT STAR

246
00:06:21,033 --> 00:06:22,067
AND SO ON.

247
00:06:22,067 --> 00:06:23,667
SO IT COULD GO ON FOREVER EVEN

248
00:06:23,667 --> 00:06:24,801
THOUGH IT'S BEING EXERTED, IT'S

249
00:06:24,801 --> 00:06:26,067
BEING ACTED ON BY FORCES.

250
00:06:26,067 --> 00:06:26,667
DANICA: HI, MY NAME IS DANICA,

251
00:06:26,667 --> 00:06:29,467
AND

252
00:06:29,467 --> 00:06:31,400
I COME FROM OWYHEE-HARBOR

253
00:06:31,400 --> 00:06:32,501
ELEMENTARY SCHOOL.

254
00:06:32,501 --> 00:06:33,701
AND MY QUESTION IS WHY DID YOU

255
00:06:33,701 --> 00:06:36,567
DECIDE TO BECOME A SCIENTIST?

256
00:06:36,567 --> 00:06:37,734
DEVINE: IT'S HARD TO REMEMBER

257
00:06:37,734 --> 00:06:38,767
THE FIRST TIME THAT I REALIZED I

258
00:06:38,767 --> 00:06:39,767
WANTED TO BE A SCIENTIST.

259
00:06:39,767 --> 00:06:40,868
BUT I THINK IT WAS PRETTY EARLY

260
00:06:40,868 --> 00:06:42,033
ON IN ELEMENTARY SCHOOL WHEN I

261
00:06:42,033 --> 00:06:43,300
REALIZED THAT I JUST WAS

262
00:06:43,300 --> 00:06:44,901
FASCINATED BY THE LESSONS I WAS

263
00:06:44,901 --> 00:06:47,067
LEARNING IN SCIENCE, AND I

264
00:06:47,067 --> 00:06:48,300
REALLY LIKED THAT SUBJECT AND

265
00:06:48,300 --> 00:06:50,100
WANTED TO KEEP DOING IT.

266
00:06:50,100 --> 00:06:51,167
IT WAS KIND OF MY FAVORITE PART

267
00:06:51,167 --> 00:06:52,334
OF THE DAY.

268
00:06:52,334 --> 00:06:53,767
AND THEN BY THE TIME I GOT ON TO

269
00:06:53,767 --> 00:06:54,901
HIGH SCHOOL, I JUST STILL REALLY

270
00:06:54,901 --> 00:06:56,334
ENJOYED THOSE CLASSES AND REALLY

271
00:06:56,334 --> 00:06:57,501
ENJOYED THE STUFF I WAS LEARNING

272
00:06:57,501 --> 00:07:00,300
THERE.

273
00:07:00,300 --> 00:07:02,033
AND SO IT JUST KIND OF BUILT ON

274
00:07:02,033 --> 00:07:03,601
AND KEPT GOING, AND I KEPT

275
00:07:03,601 --> 00:07:05,100
ENJOYING IT, AND IT NEVER

276
00:07:05,100 --> 00:07:06,200
STOPPED.

277
00:07:06,200 --> 00:07:08,300
SO HERE I AM, A SCIENTIST.

278
00:07:09,534 --> 00:07:10,534
GARDNER: AND I'LL ANSWER THAT

279
00:07:10,534 --> 00:07:11,667
QUESTION BY CHANGING IT A LITTLE

280
00:07:11,667 --> 00:07:12,501
BIT.

281
00:07:12,501 --> 00:07:13,501
I'M NOT A SCIENTIST; I'M AN

282
00:07:13,501 --> 00:07:14,334
ENGINEER.

283
00:07:14,334 --> 00:07:15,601
BUT I AM A RESEARCHER.

284
00:07:15,601 --> 00:07:16,834
AND SCIENTISTS AND ENGINEERS ARE

285
00:07:16,834 --> 00:07:18,067
VERY SIMILAR TO EACH OTHER, THEY

286
00:07:18,067 --> 00:07:19,300
HAVE VERY SIMILAR BACKGROUNDS,

287
00:07:19,300 --> 00:07:20,367
BUT THEY HAVE DIFFERENT --

288
00:07:20,367 --> 00:07:21,434
USUALLY DIFFERENT GOALS,

289
00:07:21,434 --> 00:07:22,767
DIFFERENT REASONS TO GO INTO THE

290
00:07:22,767 --> 00:07:23,667
FIELD.

291
00:07:23,667 --> 00:07:24,734
I'VE ALWAYS BEEN INTERESTED IN

292
00:07:24,734 --> 00:07:25,801
HOW THINGS WORK, AND USUALLY

293
00:07:25,801 --> 00:07:26,801
MACHINES.

294
00:07:26,801 --> 00:07:28,234
I'VE TAKEN THINGS APART A LOT

295
00:07:28,234 --> 00:07:29,400
AND PUT THEM BACK TOGETHER

296
00:07:29,400 --> 00:07:30,968
SOMETIMES.

297
00:07:30,968 --> 00:07:32,200
AND I'M INTERESTED IN MAKING NEW

298
00:07:32,200 --> 00:07:33,300
THINGS.

299
00:07:33,300 --> 00:07:34,634
AND SO THAT'S WHY I WANTED TO BE

300
00:07:34,634 --> 00:07:35,901
AN ENGINEER.

301
00:07:36,601 --> 00:07:37,400
CARTAN-HANSEN: I'M SORRY, WE'VE

302
00:07:37,400 --> 00:07:38,400
RUN OUT OF TIME.

303
00:07:38,400 --> 00:07:39,367
MY THANKS TO JOHN AND KATHRYN

304
00:07:39,367 --> 00:07:40,501
FOR ANSWERING STUDENTS'

305
00:07:40,501 --> 00:07:41,367
QUESTIONS.

306
00:07:41,367 --> 00:07:42,300
DEVINE: THANK YOU FOR HAVING US.

307
00:07:42,300 --> 00:07:43,334
I HAD A LOT OF FUN.

308
00:07:43,334 --> 00:07:44,367
GARDNER: THANK YOU.

309
00:07:44,367 --> 00:07:45,434
CARTAN-HANSEN: AND MY THANKS TO

310
00:07:45,434 --> 00:07:46,434
THE FOLKS HERE AT THE DISCOVERY

311
00:07:46,434 --> 00:07:47,901
CENTER OF IDAHO FOR HOSTING US.

312
00:07:47,901 --> 00:07:49,000
IF YOU WANT TO LEARN MORE, CHECK

313
00:07:49,000 --> 00:07:50,567
OUT THE FORCE AND MOTION AREA ON

314
00:07:50,567 --> 00:07:52,267
THE SCIENCE TREK WEBSITE.

315
00:07:52,267 --> 00:07:53,567
YOU'LL FIND FACTS, LINKS, GAMES,

316
00:07:53,567 --> 00:07:55,534
OUR FORCE AND MOTION BROADCAST

317
00:07:55,534 --> 00:07:57,634
SHOW, AND LOTS MORE.

318
00:07:57,634 --> 00:07:58,801
AND EVERY WEEK CHECK OUT MY BLOG

319
00:07:58,801 --> 00:08:00,434
FOR THE LATEST SCIENCE NEWS FOR

320
00:08:00,434 --> 00:08:01,300
KIDS.

321
00:08:01,300 --> 00:08:03,767
ALL AT IDAHOPTV.ORG.

322
00:08:03,767 --> 00:08:04,834
THANKS FOR JOINING US FOR

323
00:08:04,834 --> 00:08:06,901
SCIENCE TREK: THE WEB SHOW .

324
00:08:07,801 --> 00:08:17,133
(MUSIC)