Revisión de 07:42 24 ene 2013

Quién come que?

Calificación de los alumnos

Tested

Biología 1er ciclo

Niveles tróficos de la cadena alimentaria

Objetivos

Descubrir niveles tróficos en habitats chilenos.

Materiales

Cadena trófica
Gentileza de Icarito.cl

Materiales necesarios para el profesor:

1. Esquema de los niveles tróficos e ilustraciones
2. Ejemplo de cadena trófica

Materiales que cada alumno requerirá

1. Revistas con animales (vg. National Geographic, Scientific American)
2. Tijeras
3. Pegamento en barra
4. papel Kraft

Guiones

V.infra.

Actividad

los estudiantes aprenderán las cadenas tróficas y sus niveles

Descripción de la actividad

En primer lugar el profesor explica los cinco niveles tróficos de una cadena alimenticia a sus alumnos usando un papelografo con un cadena alimenticia típica (lámina adj.) Luego que han logrado un conocimienton de niveles tróficos, autotrofos y heterotrofos, cada estudiante mirará en sus revistas y recortará las imagenes de animales para elaborar su propia cadena alimenticia. Luego de terminado su trabajo la comparte con el grupo.

Planificación de la clase

1. Un volante de la figura de Icarito (lámina 1) para cada alumno.
2. Introduzca las diferencias entre autotrofo y hetertrofo.
3. Verifique que conocen las diefrencias entre carnivoros, omnivoros, and herbivoros.
4. Subiendo porlos niveles asegurese que los estudiantes comprenden las características específicas.
5. entregue revistas y tijeras a cada estudiante para recortar animales y cadenas alimenticias.
6. una vez que tienen material entregue pegamento en barra y papel Kraft y cada alumno para que peguen sus "recortables".
7. seguido entregue etiquetas de cada nivel de la cadena alimentaria.
8. Pida a los estudentes que compartan su experiencia en grupos de pocas personas (4-5).

Problemas potenciales

Algunos problemas que peudes encotrar es léxica y la confusión de distinguir entre los diferentes niveles tróficos.

• 

  Blatta orientalis
  omnivora

• 

  Galápagos
  herbívora

• Goat eating leeves.jpg

  consumidor de 1^er nivel

• 

  Panda rojo
  carnívoro

• 

  Gusano de tierra
  detrívoro

Transversales con Artes plásticas

Los alumnos harán dibujos de algunos animales mejorando sus experiencias en artes visuales.

enlace a Literatura

Babies in the Bayou de Jim Arnosky

Connecciones con estandares educacionales

Visual Arts – 5.29 Students use the elements and principles of two and three dimensional design in the visual arts, including line, color, shape, and texture, in creating, viewing, and critiquing.

Organisms, Evolution, and Interdependence – 7.13 Students understand the characteristics of organisms, see patterns of similarity and differences among living organisms, understand the role of evolution, and recognize the interdependence of all systems that support life.

Avanzando

Once you have covered a simple food chain or web you may continue the lesson by talking about different relationship between animals other than predator and prey situations. For instance relationships that benefit both organisms could be explored.

Citas y links

http://www.instructorweb.com/lesson/animals.asp This website would be very helpful when looking for handouts or a follow up activity.

Reflexiones

This lesson was very interesting for us to do because it produced many questions by the students that also challenged us. One of the questions that was asked numerous times was whether or not elephants eat other animals like a monkey or something along those lines. The challenge was not in the answer here but rather once we told them that they did not and that they only eat leaves and smaller things, they wanted to know how elephants got so big if all they ate were plants. This was a challenge for us to explain to them. It was also interesting to see how some students took the initiative to make their food webs very complex while others barely finished the bear minimum. We were a little pressed for time though I feel like a half an hour would have been sufficient but only twenty minutes was a little more difficult.

We have recently received feedback from the classroom teacher that we work with on the lesson and she has told us that having the list of vocabulary was crucial to the project itself. She said that many times, students just need the confidence of having the words next to the to look at whenever they need to rather than constantly having to ask how to spell something. Many students may not be confident in themselves or are too shy to ask in the fir