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by Suchitha Vishwa

Introduction

A food chain is a linear sequence of organisms through which nutrients and energy pass as one organism eats another.

Video Overview

  1. Take an A4 size paper Fold the paper into half Then fold one of the corners to the edge of the opposite side of the paper to create a right-angled triangle plus a rectangular strip below
    • Take an A4 size paper

    • Fold the paper into half

    • Then fold one of the corners to the edge of the opposite side of the paper to create a right-angled triangle plus a rectangular strip below

  2. Cut off this extra rectangular strip Unfold the right-angled triangle and notice a rectangle made up of 2 squares; i.e. length:breadth is 2:1 Again fold both the edges along the mid line to get a long doubled up rectangular strip.
    • Cut off this extra rectangular strip

    • Unfold the right-angled triangle and notice a rectangle made up of 2 squares; i.e. length:breadth is 2:1

    • Again fold both the edges along the mid line to get a long doubled up rectangular strip.

  3. Fold the strip in half to get the halfway line Fold the edges to the halfway line to get the quarter lines Fold the edges to the quarter line to get the 1/8th lines on both the sides
    • Fold the strip in half to get the halfway line

    • Fold the edges to the halfway line to get the quarter lines

    • Fold the edges to the quarter line to get the 1/8th lines on both the sides

    • Take one edge and crease it to one fold to get 1/8th on the other side of the half. Repeat with the other edge.

    • Strip will be divided into 8 equal parts

  4. Fold the paper in the middle leaving the open line outside Draw a rhombus at the centre and 2 diagonals joining 4 corners Repeat the same on the other side of the fold.
    • Fold the paper in the middle leaving the open line outside

    • Draw a rhombus at the centre and 2 diagonals joining 4 corners

    • Repeat the same on the other side of the fold.

  5. Tear one eighth of the strip off Now sharply crease all the 10 slant lines with the help of a ruler Tuck one section of one end into the other end to make a prism
    • Tear one eighth of the strip off

    • Now sharply crease all the 10 slant lines with the help of a ruler

    • Tuck one section of one end into the other end to make a prism

  6. Your prism is ready Fold half diamonds on all sides to the inside Fold 3 diamond-shaped petals to the  inside on the top and bottom
    • Your prism is ready

    • Fold half diamonds on all sides to the inside

    • Fold 3 diamond-shaped petals to the inside on the top and bottom

  7. Flexagon is ready to flex!
    • Flexagon is ready to flex!

    • The folds and creases need to be neat and precise throughout

    • How many triangles are visible and what type of triangles are they?

    • Can you make a bigger model?

    • Observe if the direction of pictures are appearing in the same direction while continuously flexing for a long time

    • Can you make a flexagon with 3:1 or 4:1 ratio of sides?

  8. The Food chain we selected  here is , Plant-> deer -> Lion. Finally dead and decay are eaten by earthworm Take  3 copies of  pictures  Plant, Deer, Lion and  Earthworm  as  shown in the pciture Cut the pictures separately and paste three same pictures on each  face of  flexagon and start flexing
    • The Food chain we selected here is , Plant-> deer -> Lion. Finally dead and decay are eaten by earthworm

    • Take 3 copies of pictures Plant, Deer, Lion and Earthworm as shown in the pciture

    • Cut the pictures separately and paste three same pictures on each face of flexagon and start flexing

    • Try to understand different food chains in nature

    • Think of a Food chain in water

    • What happens if food chain breaks or one animal in the chain becomes extinct

    • Think of a food web in a nature

Finish Line

Suhail Ahanger

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