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Angle Activity - Contenido educativo

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Subido el 28 de mayo de 2007 por EducaMadrid

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NASA Connect Segment involving students in a classroom activity that measures shadows and uses geometry to determine sizes of angles.

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There are other ways that we survey the Earth, which Aristophanes never dreamed of. 00:00:00
NASA scientists use airplanes and satellites. 00:00:04
But what if we wanted to survey other planets, like Mars? 00:00:07
NASA scientists are doing that right now. 00:00:11
But first, let's head to Central Middle School in Charlotte Courthouse, Virginia. 00:00:14
There, students are following in the footsteps of Aristophanes. 00:00:18
Hi! We're from Central Middle School in Charlotte Courthouse, Virginia. 00:00:22
NASA Connect asked us to show you how to do the student activity for this show. 00:00:29
In this lesson, you will work in small groups to take accurate measurements of shadows 00:00:34
using geometry to determine the size of an angle. 00:00:40
Here are the materials you'll need for each group. 00:00:44
A straight stick approximately 91 centimeters long. 00:00:47
A meter stick or tape measure. 00:00:51
A piece of string approximately 91 centimeters and a rocker weight. 00:00:54
A scientific calculator. 00:00:59
Index card. 00:01:02
Compass. 00:01:04
Copies of the student data chart for each student. 00:01:06
Let's begin. 00:01:09
Divide the class in research groups of three to five members. 00:01:10
Set your measurement station by first placing the gnomon perpendicular to the ground. 00:01:15
For your measurement to be accurate, it is critical that the gnomon is vertical. 00:01:21
To check the vertical position, tie the rock or weight to the string 00:01:26
and dangle it above the ground in front of the gnomon. 00:01:31
Next, measure the height of the gnomon. 00:01:35
Place an index card under the station to mark where the shadow ends. 00:01:38
Take measurements every two minutes, beginning at least ten minutes before local noon, 00:01:43
which is the time that the sun is highest in the sky. 00:01:48
This will most likely not be noon, as indicated on your time measuring device. 00:01:52
Students should note that when the sun is highest in the sky, the shadow length is the shortest. 00:01:58
Since the edge of the shadow is fuzzy and the shadow is moving from east to west in the northern hemisphere, 00:02:04
be careful in deciding where to place your mark. 00:02:11
Record your data on data chart one. 00:02:14
Now, back in your classroom, locate the latitude and longitude of your school location 00:02:17
and record it on data chart number one. 00:02:23
Identify your best shadow length. 00:02:26
This is the best shadow length at local noon time. 00:02:29
Next, calculate the tangent by dividing the length of the shadow by the height of the gnomon. 00:02:33
Locate this number, or the nearest rounded number, on the tangent table. 00:02:41
The measure of the tangent can also be found by dividing the length of a shadow 00:02:47
by the height of an object on the scientific calculator. 00:02:53
Record tangent on student data chart. 00:02:57
Make a scale drawing of your gnomon and shadow. 00:03:01
Complete the triangle and measure the tangent with a protractor to verify your calculations. 00:03:05
What's next, Jennifer? 00:03:11
Let's analyze the data by reviewing the results of this activity and by responding to the following questions. 00:03:13
Did the weather conditions affect the results of this activity? 00:03:20
If so, how? 00:03:25
As the shadow lengthens over time, how will the angle be affected? 00:03:29
If each group uses a gnomon with a different length, how will that affect the results of this activity? 00:03:37
For more activities like this, check out our website at edu.larc.nasa.gov forward slash connect. 00:03:44
NASA Connect would like to give a special thanks to the mentors from the AIAA chapter at Howard University in Washington, D.C. 00:03:56
We appreciate all your help with the student activity. 00:04:03
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Idioma/s:
en
Materias:
Matemáticas
Niveles educativos:
▼ Mostrar / ocultar niveles
      • Nivel Intermedio
Autor/es:
NASA LaRC Office of Education
Subido por:
EducaMadrid
Licencia:
Reconocimiento - No comercial - Sin obra derivada
Visualizaciones:
419
Fecha:
28 de mayo de 2007 - 16:51
Visibilidad:
Público
Enlace Relacionado:
NASAs center for distance learning
Duración:
04′ 06″
Relación de aspecto:
4:3 Hasta 2009 fue el estándar utilizado en la televisión PAL; muchas pantallas de ordenador y televisores usan este estándar, erróneamente llamado cuadrado, cuando en la realidad es rectangular o wide.
Resolución:
480x360 píxeles
Tamaño:
24.71 MBytes

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