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1.2

Minor Versionm

by Procheta Mallik

Introduction

Starting with an A4 sheet of paper, we convert it to a size such that its length:breadth is 2:1. Making various folds and creases on this paper, it is possible to mould it into a "3D flexagon" with 4 faces, and on each face you may depict one step of the nutrient cycle with the stickers provided.

Tools

  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?

    • Handle the scissors carefully

  8. Take a printout of the different stages of the nitrogen cycle . Pictures are self explanatory with brief description a) Nitrogen Fixation happens in 3 ways
    • Take a printout of the different stages of the nitrogen cycle .

    • Pictures are self explanatory with brief description

    • a) Nitrogen Fixation happens in 3 ways

    • Cut 3 pictures of nitrogen fixation

    • Stick those pictures on one of the faces of the flexagon

  9. b) Cut 3  pictures of Nitrification Stick them on the subsequent face of the hexagon c) Cut 3  pictures of Ammonification
    • b) Cut 3 pictures of Nitrification

    • Stick them on the subsequent face of the hexagon

    • c) Cut 3 pictures of Ammonification

  10. Stick them on the next flexagon face d) Cut 3  pictures of Denitrification Stick them on the last flexagon face
    • Stick them on the next flexagon face

    • d) Cut 3 pictures of Denitrification

    • Stick them on the last flexagon face

  11. Rotate the flexagon and enjoy the nitrogen cycle! Rotate the flexagon and enjoy the nitrogen cycle! Rotate the flexagon and enjoy the nitrogen cycle!
    • Rotate the flexagon and enjoy the nitrogen cycle!

    • Explore the importance of nitrogen in soil

    • Try to find out about other nutrients in soil

    • What happens if nitrogen is imbalanced in nature?

    • We have so much nitrogen in air; how come it is so difficult to get into plants or into our body?

Finish Line

Suchitha Vishwa

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