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Tree Diagrams

Tree Diagrams are a type of graphic organizer that shows how items are related to one another. The tree's trunk represents the main topic, and the branches represent relevant facts, factors, influences, traits, people, or outcomes.

Uses of Tree Diagrams:
Tree diagrams can be used to sort items or classify them. A family tree is an example of a tree diagram. Other examples of trees are cladistic trees (used in biological classification) and dichotomous keys (used to detemine what group a specimen belongs to in biology). Tree diagrams are also used as visual in statistics to document the outcomes of probabalistic events (like tossing a coin).

Binary Tree Printouts (2 options at each node):


Binary Pyramid Tree Printout

Pyramid: 3 levels, 2 options each.


Tree Diagram Printout

Squares: 3 levels, 2 options each - vertical orientation.


Tree Diagram Printout

Squares: 3 levels, 2 options each - vertical orientation, main topic at the base.


Tree Diagram Printout

Squares: 3 levels, 2 options each - horizontal orientation.


Tree Diagram Printout

Circles: 3 levels, 2 options each - vertical orientation.


Tree Diagram Printout

Circles: 3 levels, 2 options each - vertical orientation, main topic at the base.


Tree Diagram Printout

Circles: 3 levels, 2 options each - horizontal orientation.


Semicircular Binary Tree Printout

Semicircle: 3 levels, 2 options each.


Binary Pyramid Tree Printout

Pyramid: 4 levels, 2 options each.


Tree Diagram Printout

Squares: 4 levels, 2 options each - vertical orientation.


Tree Diagram Printout

Circles: 4 levels, 2 options each - vertical orientation.

Ternary (Trinary) Tree Printouts (3 options at each node):


Ternary Tree Diagram Printout

Squares: 3 levels, 3 options each - horizontal orientation.


Ternary Tree Diagram Printout

Ovals: 3 levels, 3 options each - horizontal orientation.


Ternary Tree Diagram Printout

Squares: 3 levels, 3 options each - vertical orientation.


Ternary Tree Diagram Printout

Ovals: 3 levels, 3 options each - horizontal orientation.

Related Tree Printouts:


Decision Making Printout
Three Alternatives

This tree diagram prompts the student to state a decision that needs to be made, list three possible alternatives, and the pros and cons of each alternative. The student then chooses the best alternative and makes the decision.


Decision Making Printout
Four Alternatives

This tree diagram prompts the student to state a decision that needs to be made, list four possible alternatives, and the pros and cons of each alternative. The student then chooses the best alternative and makes the decision.

Related Family Tree Activities:
FAMILY TREE

Make a Family Tree from a branching twig and construction paper.
PAPER FAMILY TREE


Make a Family Tree from construction paper.
SEMI-CIRCULAR ANCESTRY CHART


Make a semi-circular chart of your direct ancestors.
FAMILY COLLAGE


Make a great collage by cutting out pictures of family members and gluing them to poster board.


Family: Draw and Write

Draw a picture of your family and write about them -- for young writers. For additional lined paper to print, click here.
writing prompt

Write Ten Things About Your Family

A one-page printable worksheet. Write ten things about your family (plus one thing you would like to change).

Biological Concepts that Use Tree-Like Structures:

Cladistics

Cladistics is a method of classifying organisms based on common ancestry and the branching of the evolutionary family tree. Organisms that share common ancestors (and therefore have similar features) are grouped into taxonomic groups called clades. Cladistics can also be used to predict properties of yet-to-be discovered organisms.

Dichotomous Key

A dichotomous key is a series of questions which leads to the identification of an item. You can make a dichotomous key for identifying common objects.


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