How to make nutrition
Photosynthesis
Work that a photosynthesis … plant catches the light and creates oxygen and starches from water and carbon dioxide by a chloroplast. It is performed flourishingly in the day when a plant catches the light mainly.
It becomes the violet in response to iodine solution … starch. The original color is dark brown.
It is used to bleach the green of the ethanol … leaf. Because it is flammable, I warm it by hot water roasting indirectly.
[experiment 1 to check photosynthetic work]
- I prepare a variegated leaf and put it in the darkroom for a few days
- I expose a part of the leaf to aluminum はくでおおい, the sunlight.
- I exclude aluminum はくを and dip the leaf into ethanol which I warmed with hot water of around 80 degrees Celsius.
- I take out a leaf and rank iodine solution.
※1.Because originally what I put in the darkroom for で several days loses the starch which is in the leaf.
※1.The “hu” called a leaf with のふ is the chloroplastic part which there is not (not green).
[result]
Only an aluminum はくでおおわれなかった part becomes the violet in the chloroplastic part which there was. Thus, it is identified as solar light that a chloroplast is necessary to photosynthesize.
※Only by this experiment, I do not understand that water is necessary for photosynthesis.
The liquid which is muddy in response to limewater … carbon dioxide white.
The indicator which checks whether a BTB solution … liquid is acid or is neutral, or it is alkaline. Originally BTB solution in itself is blue. BTB = BromothymolBlue
| The acidity | The neutrality | Alkaline |
| Yellow | Green | Blue |
※Because it is neutral, it is BTB solution, and the pure water should become green, but it is with blue with BTB solution because it is that sodium hypochlorite melts, and the sterilized tap water becomes alkaline.
※The property of the water solution is neutral and approaches with the acidity so as to dissolve it if I dissolve carbon dioxide in tap water. In addition, I return to an original property because carbon dioxide disappears from water if the neutrality is alkaline.
[experiment 2 to check photosynthetic work]
- I pour BTB solution into two test tubes and I record breath with a straw and make yellow.
- I put a leaf of オオカナダモ in one test tube A. I put nothing in B.
- I allot two test tubes for solar light.
[result]
In test tube A, BTB solution became the blue, and test tube B did not have a change as yellow BTB solution. Thus, photosynthesis understands that carbon dioxide is necessary.
※Because a difference was reflected on a result by having オオカナダモ or not like an experiment of control experiment … this time, it is thought that the difference in result influences オオカナダモ. An experiment that only such one changes a condition and checks the difference in result by the conditionis called a target experiment.
※BTB solution has varied from yellow to blue when a test tube was only A because the sun proved right. Even という result becomes OK.
Breathing
Work to create water and carbon dioxide from breathing … oxygen and starch. The breathing is carried out all day.
Photosynthesis and breathing
I go the daytime plant … photosynthesis and breathing at the same time. Quantity of photosynthesis＞Because it is breathing, I take in carbon dioxide and seem to release oxygen. However, I am careful about the breathing being carried out at the same time.
I perform night plant … breathing.