What’s the Magical Function of Green Leaves?

papaya leavesLeaves are the most important organ for plants to conduct photosynthesis and transpiration.Meanwhile, nutrients, which are vital for the growth of plants is produced in leaves.

Leaves could conduct photosynthesis, take in carbon dioxide and produce oxygen. Leaves of some plants could even take in poisonous gases such as carbon dioxide, monoxide and chlorine, making air fresher.

As is proved by scientists, 1 tons of leaves could take in 10-30 kilogram carbon dioxide and chlorine. Each leave is a small factory, continually providing energy for plants, as well as providing oxygen essential for human life. It could be said that there would be no life on earth if there is no photosynthesis by leaves. Besides, leaves also conduct transpiration。

800px-Leaf_function

-Vojtech.dostal

The major functions of green leaves are as following:

  •  It is the source of nutrients and fertilizer
  • It is the most important industrial raw materials
  • Their medical use could not be neglected
  • Leaves could be made as instrument.

 See more…………. A Video introduce parts of leaves

Have a Think

Leaves is the most important organ to ( )

A. absorb water             B. dehydration              C. photosynthesis

Answers: C

Do Trees Have Fever?

Trees fall ill when lacking water. Their temperature would also rise when lacking water.Besides, temperature in different part of the tree is different.

450px-Ash_Tree_-_geograph.org.uk_-_590710

-Wikimedia Commons

The change of temperature of leaves is the most obvious.

During the daytime, the leaves mainly adjust temperature by transpiration. When there is enough water in the earth, the effect of transpiration is prominent. When there is not enough water, the leaves would close their pores under the sunlight. In this way, the transpiration is decreased and the temperature of the leaves rises.

The temperature of the sick trees would rise like that of men.When people get ill, their temperature rise at night and the fever is reduced in the morning.

However, this is quite contrary to the trees, whose temperature is highest in the morning.

According to the situation of the trees’ fever, the forest rangers could judge out which area of the forest is sick and take effective measures to cure them.

 

2. When do trees usually have most badly fever? ( )

A. in the morning              B. at noon                  C. at night

Answers: :A

How Plants Purify Air?


Plants are the air cleaner in the nature.

On one hand, it absorbs the carbon dioxide in the air and vomit oxygen, effectively reduce the carbon dioxide in air and making air more fresh.

photosynthesis-and-respiration-in-plants

-http://www.welcomeathome.com/garden/are-plants-in-bedroom-bad-for-your-health/

On the other hand, plants, especially forest or tropical plants, blocking, and absorbing the ashes in the air, refreshing the air.

In order to maintain life, human being have to take in oxygen and expire carbon dioxide.If the carbon dioxide in the air is too high, people would hardly breath and be toxicated. Plants are the only creature in the world to photosynthesis, besides, it is the absorber of carbon dioxide and producer of oxygen.

There are other plants which can take in toxic gas like sulfur dioxide and carbon monoxide. Besides, some plants could even take in some harmful radiation to human body, such as the cactus put in front of the computer could take in large amount of radiation sent out by the screen.

 

Have a Think

Plants are the air cleaner in the nature and they take in ( ) in air.

A. Carbon dioxide         B. oxygen                     C.ash

Answer: A

Could plants feel happiness, sadness and angry?

 

Happy-plants

-cooking greek.

A Indian botanist whose name is Bose has carried out an experiment: he waved a rake before a plant. As a result, the tentacles of the plant wave together with the rake, as if the plant is forbidding any harm from rake by waving its tentacles. Based on the experiment, Bose made an assumption that a plant has a heart. Besides, Bose invent a Cardiac curvometer and found out that the plants not only have hearts, but also have impulse. And the activity circle of the hearts is 1 minutes.

Assumed that the plants have hearts, they would have emotions.

sad flower

– Danny

In 1996, a scientist called Baxter has connected the Lie detector’s electrode to one of the leaves of dragon tree. He watered the dragon tree first and a smooth sawtooth-like curve has appeared on the detector. It seems that the dragon tree was feeling comfortable.

Then, he dipped one of the leaves into hot coffee, the reaction on the detector sent out a response of slight fear, which is not too terrible.

However, when he decided to burn this leave and held burning match near the dragon tree,the needle on the detector showed a strong wave. And apparently, this is the reaction of fear. When Baxter take back the match,the detector showed that the dragon tree has resumed normal state.

Now you may understand that trees have emotions like people. So we must take care of them!

Have a Think

  1. When you hold a fire near a sapling,will it feels fearful?  ( )
  2. A Never              B. No             C. Yes

Answer: C.

The Amazing Plants Growing

The plant is a natural chemical factory.

First of all, What are the 5 Essentials Plants Need to Grow?

 The 5 essentials plants need to grow are light, temperature, water, air and nutrients.

The most important essential is light. Plants take in light they need for photosynthesis. Besides, temperature plays an important part for the plants to grow, because plants require different temperature at different stages of growth. Water is a vital constitutes for plants. And the oxygen, nitrogen and carbon dioxide greatly effects the growth of the plants.

Have a Think

1.    The essentials needed for the growth of plants include ( ).

A. earth      B. light     C. stones and woods

Answer: B.