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Focus Question: How can
leaves be classified?
Living Systems 2-2
Focus on Leaves
Vascular plants are composed of
millions of living cells
Every cell needs water, minerals,
and food (sug...
Most xylem tubes begin in the
roots and end in the leaves.
Most phloem tubes start in the
leaves and end in the roots.
...
Leaf Collection
Stay with your group
Collect ONE leaf from as many
different plants as you can find in
5 minutes. Get le...
Sorting Leaves
Look closely at each leaf
Sort into those that show evidence
of xylem and phloem and those
that don’t.
H...
Classification
Scientists organize, or classify, things
so they can think about them more
efficiently
A group of things ...
Leaf Classification
Based on basic pattern of the
veins.
Botanists have developed a
systems that uses three patterns.
P...
Palmate
 Several large veins
extending from the
place where the leaf
stem attaches to the
leaf.
 Think of the palm of
yo...
Pinnate
 One large vein
extending the
length of the leaf
with smaller veins
branching off.
 Pinna means
feather, so a
pi...
Parallel
 Many small veins
running the
length of the leaf.
 Long, narrow
leaves, like blades
of grass, tend to
have para...
Leaf Classification
Classify your leaves based on
venation pattern.
Are there other ways to classify
your leaf collectio...
Vocabulary
 Classify
 To organize by similar properties or
behavior
 Palmate
 Several large veins extending from the
p...
Content
Venation
Classifying leaves by their vein
pattern
How do scientists organize objects
and information?
Scientist...
Homework
Read Classification, pg. 105-106,
and Summary: Vascular Plants,
pg. 107-109
Answer questions for both articles
...
Classification
What is classification?
What are three different ways leaves
can be classified?
If you had a collection ...
Summary: Vascular Plants
Describe how all the cells in a vascular
plant get sugar.
Describe how all the cells in a vascu...
Name That Leaf
 Palmate Leaf
Name That Leaf
 Parallel Leaf
Name That Leaf
 Pinnate Leaf
Could These Leaves Come
From the Same Plant?
 Why?
Could These Leaves Come
From the Same Plant?
 Why?
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Leaf classification combined

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Transcript of "Leaf classification combined"

  1. 1. Focus Question: How can leaves be classified? Living Systems 2-2
  2. 2. Focus on Leaves Vascular plants are composed of millions of living cells Every cell needs water, minerals, and food (sugar) Vascular system of plants is really two systems Xylem transports water and minerals to the cells Phloem transports sugar to the cells
  3. 3. Most xylem tubes begin in the roots and end in the leaves. Most phloem tubes start in the leaves and end in the roots. Find out about the place where the xylem ends and the phloem begins, the leaf.
  4. 4. Leaf Collection Stay with your group Collect ONE leaf from as many different plants as you can find in 5 minutes. Get leaves of all sizes. Keep sample in the bag.
  5. 5. Sorting Leaves Look closely at each leaf Sort into those that show evidence of xylem and phloem and those that don’t. How many of your leaves have veins? Are the veins all the same size? Do the veins branch? Sort your leaves in a new way.
  6. 6. Classification Scientists organize, or classify, things so they can think about them more efficiently A group of things that go together based on a property or behavior is a class. 5th graders form a class based on age. 4th graders are a different class, etc… In schools we classify students by age.  Geology – classify crystals by shapes and angles of surfaces. Classify sand by particle size.
  7. 7. Leaf Classification Based on basic pattern of the veins. Botanists have developed a systems that uses three patterns. Palmate Pinnate Parallel
  8. 8. Palmate  Several large veins extending from the place where the leaf stem attaches to the leaf.  Think of the palm of your hand and your fingers as the main veins.
  9. 9. Pinnate  One large vein extending the length of the leaf with smaller veins branching off.  Pinna means feather, so a pinnate leaf resembles a feather
  10. 10. Parallel  Many small veins running the length of the leaf.  Long, narrow leaves, like blades of grass, tend to have parallel veins.
  11. 11. Leaf Classification Classify your leaves based on venation pattern. Are there other ways to classify your leaf collections? Leaf Shape (Blade) Kind of edge (Margin) Kind of attachment (Petiole)
  12. 12. Vocabulary  Classify  To organize by similar properties or behavior  Palmate  Several large veins extending from the place where the leaf stem attaches to the leaf (Palm)  Pinnate  One large vein extending the length of the leaf with smaller veins branching off (Feather)  Parallel  Many small veins running the length of the leaf (Grass)
  13. 13. Content Venation Classifying leaves by their vein pattern How do scientists organize objects and information? Scientists classify things by putting them in groups (classes) based on similar properties and behaviors.
  14. 14. Homework Read Classification, pg. 105-106, and Summary: Vascular Plants, pg. 107-109 Answer questions for both articles I-check 2 quiz on Friday, 10/11
  15. 15. Classification What is classification? What are three different ways leaves can be classified? If you had a collection of insects, what ways might you classify them?
  16. 16. Summary: Vascular Plants Describe how all the cells in a vascular plant get sugar. Describe how all the cells in a vascular plant get water and minerals. Why do its leaves turn pink when a celery stalk is placed in red water? In what way are blood and sap the same?
  17. 17. Name That Leaf  Palmate Leaf
  18. 18. Name That Leaf  Parallel Leaf
  19. 19. Name That Leaf  Pinnate Leaf
  20. 20. Could These Leaves Come From the Same Plant?  Why?
  21. 21. Could These Leaves Come From the Same Plant?  Why?
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