“Plant tissue” - Cell walls are unevenly thickened. Impermeable to water and gases. Under the stoma there is a gas-air chamber. Life processes are regulated by special substances - phytohormones. Serve to preserve nutrients. List the main types of excretory tissues. The cuticle and wax coating are poorly permeable to water and gases.
““Fruits” 6th grade” - What is a fruit. Flower. Check yourself. Collect a logical chain of concepts. Guess it. Removing seeds from the mother plant over a long distance. What's superfluous. Fetus. The fruit of peas, peach, apple, poppy, cucumber. Name a juicy single-seeded fruit. You pass by a flower. Describe natural objects according to plan.
“Leaf and its structure” - The underside of the leaf blade. The upper side of the leaf blade. Leaf structure. Leaf morphology. Petiole. Pigment cells. Leaf veins. Epidermal hairs 60*. Bottom skin. Leaf blade. Epidermal hairs 200*. Section of a leaf blade.
“Test “Organs of Flowering Plants”” - Which plants have seeds that are dispersed by the wind. A plant is a whole organism. Type of venation. Organs of flowering plants. Inflorescence head. Juicy fruits. The structure of the seed. Internal structure of the stem. Flower structure. Organs of a flowering plant. The test is over. Names of plant parts. Types of leaves.
““Escape and Buds” 6th grade” - Reading with notes. Leaf arrangement. Highlight the main semantic blocks in the text. Escape and buds. The escape. How a leaf is structured. Sinkwine. A bud is a rudimentary shoot. The leaves are simple and complex, their veining and leaf arrangement. Labeling table. Petiolate and sessile leaves. Leaves Simple and complex Grow, fall, secrete Very necessary.
Slide 1
Topic of research: How leaves fall Pupils of class 2 “B” of Municipal Educational Institution Lyceum No. 8 Head Konova A.N.Slide 2
Our assumption: “If the trees do not shed their leaves in the fall, then they will be warmer in the winter”
Slide 3
What we want to find out Why in the fall a leaf easily falls off a branch Why trees shed their leaves Which trees shed their leaves first What determines the brightness of autumn leaves
Slide 4
Questions to which you need to look for answers: How are preparations for leaf fall going? Which tree leaves turn yellow first?
Slide 5
Our plan of action We will discuss the topic in class We will divide into groups We will make observations We will research We will present the prepared material to our classmates
Slide 6
What have we learned? Amazing transformations occur in the leaves. In autumn, the green grains of chlorophyll are destroyed, but the yellow pigment is preserved. The leaves are turning yellow. The leaves become not only yellow, but also red, crimson, and purple. It depends on what coloring substance is in the withering leaf. The leaves of alder and lilac fall green. In their leaves, except for chlorophyll, there are no other coloring substances.
Slide 7
What have we learned? Trees have their own “internal” clock. In August, the leaves of birch and linden began to turn yellow. In September, maple leaves turn yellow, rowan leaves turn red, and at the end of the month aspen leaves turn bright red. In ash and hazel trees, the leaves first fall on the upper ends of the branches. In linden and poplar, the leaves of the main part of the branches fall off first.
Slide 8
What have we learned? The brightness of autumn leaves depends on the weather. If autumn is long and rainy, the color of the leaves from excess water and lack of light will be dull and inexpressive. If cold nights alternate with clear sunny days, then the color of the leaves will be juicy and bright.
Slide 9
What have we learned? Why don’t all the leaves on a tree turn yellow at once in the fall? Because they grew at different times and turn yellow in the same order. The upper leaves retain more nutrients and stay green longer. The upper leaves get more sunlight, so they turn yellow later.
Slide 10
Our conclusions The leaf is attached to the branch using a petiole. In summer, the petiole is strong and securely holds the leaf. In autumn, a separating layer forms at the base of the petiole. Now the petiole is weakened, and the blowing wind easily tears it off the branch along with the leaf. Leaf fall helps trees adapt to winter drought. Deciduous trees left in foliage over the winter would die from lack of moisture. In winter, little water enters the plant, and the leaves would continue to evaporate it. Also, during the summer, harmful substances accumulate in the leaves of trees. In autumn, these substances are removed from the tree along with fallen leaves.
Slide 11
Information resources A.A. Pleshakov “The World Around Us”; M. Education, 2007 L.F. Klimanova “Native Speech”; M. Education, 2007 G. Graubin “Why do leaves fall in autumn?” M.: “Baby” 1987 "Elementary School. Schoolchildren's Handbook" M. : “The Word” 1997 M.A. Gusakova “Applique” M.: “Enlightenment” 1987
1.I am the authority……………….
2. According to the method of attachment there are………………. And ……………………. .
3. The petiole leaf consists of………… and ………., the sessile leaf consists only of……….
4. A simple leaf is when on the petiole……. leaf plate. A complex sheet is when……………. sheet plates.
5. Leaves have 3 types of venation ………………, ………………,………………
6. Special green substance of the leaf……….
7……………- formation of organic substances in the light with the help of chlorophyll.
1.I am an authority plants .
2.According to the method of attachment petiolate And sedentary .
3.The petiole leaf consists of petiole and leaf plates , sedentary only from sheet plate
4. A simple leaf is when it is on a petiole one leaf plate. A complex sheet is when some sheet plates.
5.Leaves have 3 types of venation mesh , parallel , arc .
6. Special green leaf substance chlorophyll .
7. Photosynthesis - formation of organic substances in light with the help of chlorophyll.
Spun around me
The rain of leaves is mischievous.
How good he is!
Where else can you find something like this?
Without end and without beginning?
I began to dance under it,
We danced like friends -
Rain of leaves and me.
LEAF FALL
What two words are found in this word?
SHEET
FALL
Not a good tree
the leaf drops.
Fizminutka
Leaves are falling in the Summer Garden. The leaves in the garden are rustling. Leaves are bathing in the Lebyazhya ditch. Wiper cleaners are clearing the lawns of leaves. Sad statues in quiet alleys. In the quiet alleys there is an autumn breeze.
1 Chlorophyll is destroyed in the leaves.
2 The leaf changes color.
3 The leaf accumulates unnecessary substances.
4 A corky layer forms between the leaf and stem.
5 The leaf turns brown.
6 The sheet is torn off.
7 The leaf falls.
- Fast, friendly leaf fall means a harsh winter.
- The oak tree began to shed its leaves, indicating colder weather.
- If birch leaves begin to turn yellow from the top in the fall, then next spring will be early, and if from below, then it will be late.
- Aspen leaves lie on the ground face up - the winter will be cold, with the wrong side up - warm.
- The leaf falls before its time - for a long winter.
- Until the leaves fall from the cherry trees, no matter how much snow falls, the thaw will drive it away.
EXERCISE “ARTIST”
It's good to sit under an autumn birch tree.
Add leaves to the birch tree.
syncwine
- On first line - one word noun.
This is the theme of syncwine - leaf fall.
- On second line - two adjectives.
- On third line - three verbs.
- On fourth line - a sentence with the help of which one expresses one’s attitude to the topic. This could be a catchphrase, a quote.
- Last a line is a summary word.
Leaf fall.
Beautiful, protective.
Breaks away, spins, falls,
The plant is preparing for winter.
Slide 2
Our assumption: “If the trees do not shed their leaves in the fall, then they will be warmer in the winter”
Slide 3
What do we want to find out
Why does a leaf easily fall off a branch in autumn? Why do trees shed their leaves? Which trees shed their leaves first? What determines the brightness of autumn leaves?
Slide 4
Questions to look for answers to:
How to prepare for leaf fall Which tree leaves turn yellow first
Slide 5
Our action plan
We will discuss the topic in class We will divide into groups We will make observations We will research We will present the prepared material to our classmates
Slide 6
What have we learned
Amazing transformations occur in the leaves. In autumn, the green grains of chlorophyll are destroyed, but the yellow pigment is preserved. The leaves are turning yellow. The leaves become not only yellow, but also red, crimson, and purple. It depends on what coloring substance is in the withering leaf. The leaves of alder and lilac fall green. In their leaves, except for chlorophyll, there are no other coloring substances.
Slide 7
What have we learned
Trees have their own “internal” clock. In August, the leaves of birch and linden began to turn yellow. In September, maple leaves turn yellow, rowan leaves turn red, and at the end of the month aspen leaves turn bright red. In ash and hazel trees, the leaves first fall on the upper ends of the branches. In linden and poplar, the leaves of the main part of the branches fall off first.
Slide 8
What have we learned
The brightness of autumn leaves depends on the weather. If autumn is long and rainy, the color of the leaves from excess water and lack of light will be dull and inexpressive. If cold nights alternate with clear sunny days, then the color of the leaves will be juicy and bright.
Slide 9
Why don’t all the leaves on a tree turn yellow at once in the fall? Because they grew at different times and turn yellow in the same order. The upper leaves retain more nutrients and stay green longer. The upper leaves get more sunlight, so they turn yellow later.
Slide 10
Our conclusions
The leaf is attached to the branch using a petiole. In summer, the petiole is strong and securely holds the leaf. In autumn, a separating layer forms at the base of the petiole. Now the petiole is weakened, and the blowing wind easily tears it off the branch along with the leaf. Leaf fall helps trees adapt to winter drought. Deciduous trees left in foliage over the winter would die from lack of moisture. In winter, little water enters the plant, and the leaves would continue to evaporate it. Also, during the summer, harmful substances accumulate in the leaves of trees. In autumn, these substances are removed from the tree along with fallen leaves.
