Editing Food Chain Jenga (section)

== Demonstration ==

# Build the Jenga tower with <span style="color: blue"> '''Blue'''</span> on the bottom, followed by <span style="color: green"> '''Green'''</span>, <span style="color: purple"> '''Purple'''</span>, and <span style="color: pink"> '''Pink'''</span> on top.
# Have students identify the layers as being different parts of the food chain, with the upper layers being consumers of the lower layers. For example, the bottom layer could be grass, the next layer bugs, the next layer frogs, and the top layer snakes.
# Give the students different scenarios that can affect the stability of the food chain:
#* Say that some bugs die due to disease. This means that some frogs also die, as well as snakes.
#* Say that there is a boost in the frog population. This means that a lot of bugs will be eaten, weakening the bug layer and making the grass layer thicker. This also makes the snake layer thicker, since they have more to eat.
#* Say that the snakes start over-hunting the frogs. This means that there can be more bugs, so more of the grass is eaten and makes the grass layer weaker.
# Give examples and keep pulling parts out until the tower collapses. Why did the tower collapse? Can students think of ways to help prevent the tower from collapsing?