every tree is different! you will make observations and record data for your tree throughout the...
TRANSCRIPT
Every tree is different! You will make observations and record data for your tree
throughout the year and see how it changes
What makes a tree a tree?• Heights at least 4.5
meters (about 15 feet)• Single dominant woody
stem or trunk• Trunk is 9 1/2 inches in
circumference (3 inches in diameter)
• Definitely formed crown of foliage
• Perennial plant
Date: ____________ Time:__________
Air Temperature: ___________ Relative Humidity: ___________
Rockaway Weather, Current Conditions and Temperature
Weather Conditions: ___________________________________(sunny, cloudy, rain, etc.)
Light Conditions:______________________________________(amount of light your tree receives at this time of day)
List other abiotic factors: _______________________________(water, rocks, and sand)
When drawing your tree, start
with the trunk and add just a few
leaves. You don’t need to draw each
leaf!!
Tree Description: (Describe your tree in detail about 5-8 sentences.
With this description, someone should be able to pick your tree out of the bunch.)
List 5 Biotic Factors:(List all living things you see on and around your
tree.)
Leaf Description:
Draw a picture of your leaf:
Draw major features on your map.
Label your tree location
Draw symbols for other plant life. Example:
*Bushes+Large Trees∆Small Trees
Leaves of three, let it be!! Hairy vine, no friend of mine!! Raggy rope, don’t be a dope!! Berries white, run in fright
Be very careful!!
Don’t harm trees, animals, or insects. Preserve the stone wall by walking around. The quieter you are the more you will
see Stay Focused on assignment. You will be
given a participation grade. Be prepared to share your findings with
the class!
“Fall” for Leaves in Science!
Dendrology
• ‘Dendro-’ from the Greek word meaning tree
• ‘-ology’ meaning the study of• Dendrology is the study of
trees and includes taxonomy, identification, and ecology
Tree Identification
By observing leaves
Classes of Trees
• Conifers (Evergreen)
• Deciduous
• Palms
Conifers vs. Deciduous
Which is Which?
Characteristics of Conifers
• Needle shaped leaves• Seeds that develop
inside cones• Evergreen – green
year round• Gymnosperm (“Naked
Seed”) or Cones • Examples: pine,
spruce, hemlock, fir
Examples of Conifers
Balsam firDouglas fir
Fraser fir Scotch pine
Red pine
White pine
Conifer leaves• Needle like • Scale like
Conifer needles
• Clusters • Singles
Deciduous Tree Characteristics
• Broad flat leaves• Lose all leaves each
year in the fall• Angiosperm
(flowering plants), broadleaf, hardwood
• Examples: oak, maple, beech, aspen, ash
Deciduous examples
Red oak Red maple
Black locustWhitebirch Crimson king
Honey locust
beech
Elm
Leaf characteristics-deciduous
• Leaf shape• Leaf arrangement• Leaf margin (edge)• Leaf type
Leaf Shape
Oval, Elliptical, or Egg Shaped??
Elliptical: wider at center and tapering to an equal size at each end.
Egg shaped
Ovoal: Considerably longer than wide with almost parallel sides
How do you ID a tree?
1.Examine leaf on tree-Pick one good example of leaf
2.Determine leaf arrangement-Draw picture in journal
3. Is the leaf simple or compound?
4.Observe type of fruit on tree5.Use a dichotomous key to
determine what type of tree it is!
Leaf Arrangement
alternate opposite whorled
Leaf Node
A leaf node is where the leaf is attached to the stem. This way, a new set of leaves will grow from that area, which will make the tree fuller.
What is this type of leaf arrangement?
What is this type of leaf arrangement?
What is this type of leaf arrangement?
What is this type of leaf arrangement?
What is this type of leaf arrangement?
What is this type of leaf arrangement?
What is this type of leaf arrangement?
What is this type of leaf arrangement?
Leaf Margin (Edge)Lobed , smooth, toothed (serrated)?
Serrate or Doubly Serrate?Write definitions below on Lab
serrate — a leaf margin that has pointed teeth that are directed upward
doubly serrate — a serrate leaf margin where the primary teeth support another set of teeth
Smooth Wavy
Serrate or Doubly Serrate?
Serrate or Doubly Serrate?
Serrate or Doubly Serrate?
Serrate or Doubly Serrate?
Types of Leaves
• Simple: Has only one leaf per stem.
• Compound: Has more than one leaves per stem.
Simple Compound
• Only one leaflet• Joined by its stalk to
the woody stem• Examples: maple, oak,
aspen, beech
• Made up of several leaflets
• Leaflets are joined to a midrib that is not woody
• Examples: ash, walnut, sumac
Simple or Compound?
Simple Leaves Compound Leaves
Leaf Observations
Deciduous ConiferLeaf arrangement:Alternate, opposite, whorl
Needles or scales
Leaf type:Simple, compound
Needle attachment:Single, clusters
A few plants will try to fool you by having opposite leaves in some places, and alternate leaves in others. So look at a few parts of the plant. Always examine many samples in nature, to get a good understanding of what ís going on.
Don’t Be Fooled!!
Why do Deciduous Trees’ Leaves Change Color and Fall Off in Autumn?
Click on the movie to the right to find out!!!
You Don’t Have to, You Get To!!
• Guess what??? Now you are ready to go on our leaf walk and start collecting our leaves for your own leaf collection. We have a lot of fun and don’t worry, we collect almost all of the leaves together!
How do I Put the Collection Together?
1. Keep all of your leaves pressed for at least one full week.2. Take your leaf title pages you made in computers and carefully tape or
gluestick your leaf to each page.3. Place your leaf pages in number order, either with a 3 hole punch or by sliding
them back to back in the protector pockets.4. Create your own cover stating “Leaf Collection” and your first and last name.
You may use the computer or you may use any craft materials to create a fancy look.
5. Put the following pages in order to complete your notebook:
Please put your notebook in the following order:
1. Table of Contents2. 28 leaf samples pressed and labeled3. Poems about Trees (neatly written,
illustrated, and colored)4. Tree Outline5. Tree Terms Sheet6. Outline Test7. Leaf Identification Test
What do the Pages Look Like?
Table of Contents
Leaf Samples Tree Outline Tree Terms
Outline Test Leaf ID Test
Good Luck, Have Fun and Be Creative!!