14
Focus Question: How can leaves be classified? Living Systems 2-2

Leaf classification

Embed Size (px)

DESCRIPTION

Leaf Classification

Citation preview

Page 1: Leaf classification

Focus Question: How can leaves be classified?

Focus Question: How can leaves be classified?

Living Systems 2-2Living Systems 2-2

Page 2: Leaf classification

Focus on LeavesFocus on LeavesVascular plants are composed of

millions of living cellsEvery cell needs water, minerals,

and food (sugar)Vascular system of plants is really

two systemsXylem transports water and minerals

to the cellsPhloem transports sugar to the cells

Vascular plants are composed of millions of living cells

Every cell needs water, minerals, and food (sugar)

Vascular system of plants is really two systemsXylem transports water and minerals

to the cellsPhloem transports sugar to the cells

Page 3: Leaf classification

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.

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.

Page 4: Leaf classification

Leaf CollectionLeaf Collection

Stay with your groupCollect ONE leaf from as many

different plants as you can find in 5 minutes. Get leaves of all sizes.

Keep sample in the bag.

Stay with your groupCollect ONE leaf from as many

different plants as you can find in 5 minutes. Get leaves of all sizes.

Keep sample in the bag.

Page 5: Leaf classification

Sorting LeavesSorting LeavesLook closely at each leafSort 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.

Look closely at each leafSort 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.

Page 6: Leaf classification

ClassificationClassificationScientists organize, or classify, things

so they can think about them more efficientlyA 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.

Scientists organize, or classify, things so they can think about them more efficientlyA 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.

Page 7: Leaf classification

Leaf ClassificationLeaf ClassificationBased on basic pattern of the

veins.Botanists have developed a

systems that uses three patterns.PalmatePinnateParallel

Based on basic pattern of the veins.

Botanists have developed a systems that uses three patterns.PalmatePinnateParallel

Page 8: Leaf classification

PalmatePalmate

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.

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.

Page 9: Leaf classification

PinnatePinnate One large vein

extending the length of the leaf with smaller veins branching off.

Pinna means feather, so a pinnate leaf resembles a feather

One large vein extending the length of the leaf with smaller veins branching off.

Pinna means feather, so a pinnate leaf resembles a feather

Page 10: Leaf classification

ParallelParallel

Many small veins running the length of the leaf.

Long, narrow leaves, like blades of grass, tend to have parallel veins.

Many small veins running the length of the leaf.

Long, narrow leaves, like blades of grass, tend to have parallel veins.

Page 11: Leaf classification

Leaf ClassificationLeaf 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)

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)

Page 12: Leaf classification

VocabularyVocabulary 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)

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)

Page 13: Leaf classification

ContentContent

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.

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.

Page 14: Leaf classification

HomeworkHomework

Read Classification, pg. 105-106, and Summary: Vascular Plants, pg. 107-109

Answer questions for both articles I-check 2 quiz on Monday, 1/23

Read Classification, pg. 105-106, and Summary: Vascular Plants, pg. 107-109

Answer questions for both articles I-check 2 quiz on Monday, 1/23