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Adapted from Hands-On Nature, Vermont Institute of Natural
Science
Pre-Visit Activity, All Grades
Objective
Students will be introduced to what is found on the ground
through senses other than sight.
Background
The forest floor can be an especially fertile place to study
what we walk on. Much more than just
dirt or grass, the ground serves as a habitat for millions of seen and unseen
plants and animals. Together they form a
complex food web and an efficient recycling system.
Materials
- Cloth or paper bags with forest floor objects inside, one
type of object per bag
- (wood, small rocks, moss, leaves, bark, sticks, fungus,
bone, pine cone, soil)
Procedure
- Seat students in a
circle. Ask them to close their eyes and
imagine they are walking barefoot in a forest.
What are they walking on? What
does it feel like? What does it smell
like? (Some students have probably never
walked barefoot in a forest and you may have to ask more leading questions.)
- Have children open
their eyes. Pass the bags, one at a
time, halfway around the circle. Explain
that the bags contain things we walk on in the forest. Each child feels and smells the object and
gives an adjective describing it without giving away what it is. The other half of the circle tries to guess
the bag's contents. The last child gets
to reveal the object.
- Alternate the
order you pass the bags so everyone gets the chance to guess and to feel.
- Have older
children consider how the objects might change and decompose over time. Have them try to arrange the objects in the
order of decomposition rates. This might
initiate discussion as there will probably be more than one possible
order. The point to make is that
smaller, softer, thinner objects will often break down more quickly, but that
everything will eventually be aged, weathered, or decomposed by bacteria and
other decomposers in the soil until it turns into what we may have thought of
as "just dirt."
Extensions
Take students outdoors to a nearby forest, field, or
park. Have students get down low and try
to find some of the different soil components you felt in the classroom. If the area is free of glass or other harmful
trash allow willing students to walk barefoot.
Bring along a plastic bag in case students find trash. Discuss the decomposition rates of the trash
items they find (for example plastic pop bottles will be around for hundreds of
years). Discussion of the trash items
may lead older students toward a discussion of recycling.
Soil samples can be collected from different locations
(under a bush, in the middle of the field) for the Pre-Visit Activity, Soil
Shakes.
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