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current
position > Education on plants > Education plants for
children
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| 1.classification
of plants / 2.life of plants
/ 3.environment for plants |
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| 1. classification of
plants |
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Hey, friend!
You have evergreen trees, deciduous trees, tall-growing
trees, and short and beautiful trees. How can you be distinguished? |
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It is same as human beings.
There are many kinds of people such as women and men,
black and white, and the yellow races. As well tall people
and dwarves. Trees have different names depending on how
they look, just like human beings. |
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How? |
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There are female trees and
male trees. Mostly trees are hermaphroditic but ginko
trees are dioecious. As people can be distinguished by
complexion, if green leaves dangle on the tree in winter,
they are called evergreen trees but if the leaves fall
in winter, they are called deciduous trees. |
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Are there any ways
of distinction? |
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There are various ways of distinction.
For example, if the leaf looks like a needle, it is a
needle-leaf tree, and if the leaf the leaf is large like
a hand, it is called a broadleaved tree. A tree that is
big and which has many leaves on branches, is called a
tall tree. If a tree is short and has many branches from
the root, it is called a bush. |
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Oh! Pine trees have
leaves in the winter that are like needles and the tree
are tall, then they should be called evergreen, needle-leaf,
and tall trees. |
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That’s right. What a
nice job!
Can you distinguish other trees? |
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Of course, I can. |
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Plants are generally classified
in two sorts, such as : tube plants and tubeless plants.
Mosses and Lichens are example of tubeless plants. Also,
plants that propagate by spore are called pteridophytes
and those which propagate by seeds are called seed plants.
Seed plants are also divided by gymnospermous plants and
angiospermous plants. Angiospermous plants hide their
seeds, which are divided again with dicotyledon and monocotyledon.
Grass, rice plants, and barley plants are monocotyledons.
Dicotyledons are classified in terms of order, a family,
and species. |
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| 2.life of plants |
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By the way, how do
you spend a day?
We spend a day by waking up, eating food, working out,
and studying. |
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It is same as you. We work
hard after the rising of the sun but what we do
cannot be seen well. When we get sunlight to blades and
stalks, we make nutrition (carbohydrate) with water which
is from the root and carbon dioxide from the air. It is
called photosynthesis. We make oxygen by using carbon
dioxide that people need when the breathe. That is why
feel refreshed in woods. There is so much clean in woods. |
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How great you are!
I didn’t know that you provide oxygen for us. Now
I know you are very important to human beings but I wonder
that you take a rest or not. |
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Of course we do. We take a
rest at night. After dark, we carry the nutrition which
is made during the day to the stalk and the root, and
we wash the dust with dew. |
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How can you distinguish
the light? You don’t even have any eyes? |
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Oh, let me tell you. Our bodies
pores on the blade open automatically and blow out vapor
that absorbs water from the root. So we can make lots
of nutrition when sunlight, temperature, and water are
provided suitably. |
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Do you like sunny
and cool days? |
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Certainly. |
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Well, we swim
in summer and make snowmen in winter but you do the same
thing everyday. It is boring. |
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No, it isn’t. we work
a little differently in each season |
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How different? |
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In spring, we wake up from
hibernation and we make sprouts with nutrition that was
saved from last year. Some of us make flowers. |
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Then, what do you
do in summer? |
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In summer, we feel just a little
tired so we grow slowly but we carry nutrition from the
blades to our bodies equally, which makes us strong. When
it is fall, it is a good time for working. We prepare
sprouts and give power to the sprouts to survive during
winter. Some turn red and some lose their leaves. |
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I see. We have many
things in common. |
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Yes, that’s right. We
are alive so treat us well. |
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| 3.Environment for plants |
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Would you mind
telling us why you need sunlight, temperature, and water,
and how they are handled? |
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Why not. First, we need sunlight
surely. The sunlight is need for making nutrition. It
must be provided when we make the nutrition by water,
which is from the ground and carbon dioxide which is from
the air. |
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Does every plant
need the sunlight? |
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Not all. Some plants like bright
light ( over 50,000 lux) such as carnations, chrysanthemums
and garden balsams. Salvias and rhododendrons like middle
light ( over 30,000~below 50,000). Brackens that live
middle in shaded ground like delicate light ( below 30,000
lux) |
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How can you feel
the strength of the light? |
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Just compare with midsummer’s
luminosity is about 10,000 ~ 12,000 lux. |
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I cannot remember
each of you. I wonder that you have any easy idea or way
to remember? |
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OK. I will tell you easier.
For instance, rice plants and barely plants which have
thin leaves and stand vertically need stronger light than
brackens, which stand horizontally. Also large-leaf plants
can grow better in shade than thin-leaf plants can get
the sunlight with the large area of their leaves even
though the light is weak |
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How can some
plants that like weak light be handled in midsummer? |
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That’s easy. Just shut
out the sun. |
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Oh, I got it. Hey
friend, is there any influence about getting to short
daytime? |
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Yes, there is. We are able
to feel when daylight hours are becoming shorter, so some
plants make flowers. |
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Who are they? |
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Carnations and violets make
flowers in spring when daytime is longer more and more.
On the contrary, when it is shorter more and more, morning
glories, cosmos, and chrysanthemum make flowers in fall. |
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Just a little strange.
I saw chrysanthemum’s flowers in summer? |
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Oh, that is because people
shut out the sun on purpose. |
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Well, what kind
of job does temperature do? |
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Temperature controls moving
of various plant hormones and ferments. It depends on
the plant but it lets plants grow well in hot summer and
it lets plant grow a little in cold winter. |
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Is it true that cactuses
like high temperature? |
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Cactuses and pine apples like
temperatures that are harmonious with day and night temperature
better than high temperature. It should be kept 18~20
C at night and 20~25 C in daytime. |
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By the way, I
put a flowerpot in my room but it is dead. What happened? |
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We can survive not only due
to temperature, water, and sun but also humidity. |
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What is humidity’s
function? |
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Humidity keeps water from coming
out of our bodies and it influences us to absorb water
with the root. |
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How can you survive
in winter? |
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Plants which live in shade
like high humidity and weak light. Those plants that live
in sunny places like low humidity and strong light. It
is better to remove plants from the living room or bathroom
in winter. If the air is dry, sprinkle water on the leaves
and cover with vinyl. |
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You can’t survive
without water, can you? |
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No, absolutely not. Our bodies
are composed of over 90% of water. |
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How does the water
work? |
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Water keeps our bodies to be
tight and in a straight posture. It also helps to control
temperature and we need if for making nutrition for our
bodies. |
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What will happen
without water? |
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The root cannot absorb water
from the soil, so small holes are closed automatically.
This makes our bodies’ temperature get higher and
then we become dead instead. |
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How about wind?
Is it important? |
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Oh, yes. Strong and cold wind
is not so good but a gentle breeze to carry carbon dioxide
to leaves where we make nutrition and to fly vapor which
protects us from raising in temperature is good for us. |
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Are there any other
influences? |
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There are lots of influences.
For example, it is in relation to soil, manure, damage
by bright and harmful insects, and pollution and so on. |
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Thank
you. Buddy!
I learned so much good information from you. It’s
very nice of you to tell me about plant life. |
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