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 Group Title: Environmental teaching plans Title: Key a tree leaf
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 Material Information Title: Key a tree leaf Series Title: Environmental teaching plans Physical Description: Archival Language: English Creator: St. Croix Environmental Education Team Publisher: Division of Fish and Wildlife Place of Publication: Frederiksted, VI
 Record Information Bibliographic ID: CA01300920 Volume ID: VID00054 Source Institution: University of the Virgin Islands Holding Location: University of the Virgin Islands Rights Management: All rights reserved by the source institution and holding location.

00054KeyaTreeLeaf ( PDF )

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E.T. A LOCAL WAY OF LEARNING E-54

Title: KEY A TREE LEAF

AUTHOR: Kathryn Doss
Eulalie R. Rivera Elementary School

Concepts: Disciplines:
6. Resources 1.Language Arts
12. Stewardship 2.Art
3.Science
4.Mathematics

Objective:

Each Group will collect a set of leaves and will develop a dichotomous key for
the collection. The key will be illustrated.

Rationale:

Trees are a valuable renewable resource. By more closely observing leaves of
trees around us we will begin to appreciate their diversity, beauty, and value.
This is a starting point for developing a sense of stewardship.

Materials Needed:

For each group, one paper bag, a 4' x 4' piece of light colored paper, felt
marker or crayon.

Directions/Activity:

Divide students into groups of 3-5. Each group collects or brings from home one
sample of each kind of tree leaf they can find. If the tree has less than 20
meeting point for instructions for constructing the key.

Making the Key

Divide leaves into two groups according to some characteristic such as single
leaf or fern-like leaf, smooth edges or indented edges. Record as illustrated.
Then divide each of those groups according to another characteristic. Continue
divisions until a single leaf is in each group and continue recording as in
illustration provided.

Discuss:

1. What are some of the common trees identified by the leaves?
2. Of what value are such trees to the people on the Islands?
3. Are such trees an abundant or scarce Island resource?

E-54
E. T.

KEY A TREE LEAF

Extended Activities:
This activity may be adapted for use with local bushes or native flowers.

Rubbings: Back in the classroom, place a sheet of paper over a leaf, vein side
up, and rub it with a crayon or pencil.

Evaluation:

The leader will check achievement when each group displays its leaf key.

E-54

E. T.

KEY A TREE LEAF

KEY ILLUSTRATION

KEY ILLUSTRATION

Not fern like leaf

Fern like leaf

longer than
3 inches

are
rounded

shorter than
3 inches

a

indentations
greater than
1 inch

alternating
veins

leaf
shaped
like (

shorter than
3 inches

indentations
less than
1 inch

veins
symmetric

pointe
end

longer than
3 inches

TRACE ROUTE

Total Execution Time: 30 Milliseconds

MILLISECOND   CLASS.METHODMESSAGE
0sobekcm_page_globals.constructor
0sobekcm_page_globals.constructorApplication State validated or built
0sobekcm_database.verify_item_lookup_object
0sobekcm_page_globals.constructorNavigation Object created from URI query string
0sobekcm_database.verify_item_lookup_object
0sobekcm_page_globals.display_itemRetrieving item or group information
0sobekcm_page_globals.get_entire_collection_hierarchyRetrieving hierarchy information
0sobekcm_assistant.get_entire_collection_hierarchy
0cached_data_manager.retrieve_item_aggregation
0cached_data_manager.retrieve_item_aggregationFound item aggregation on local cache
0item_aggregation_builder.get_item_aggregationFound 'all' item aggregation in cache