Plz help me to do this project!!!I don't know how to start......so plz help!!!?

Question

1)Prove that a gas is given off by plants during photosynthesis.
2) Determine the color of light most favorable for photosynthesis.

Answer 1

You can probably find diagrams of how to set-up these experiments in a biology book. I'll give my best shot verbally:#1) You will need: a beaker (approx. 1000 ml.) ,standard test tube,glass funnel, aquarium water, an aquarium plant (suggest Elodea /Anacharis, 3 or 4 small (~ 1/4") objects, like stones, to support the funnel under water,a wooden splint and matches, and a light source (a bulb or sunlight).
Fill the beaker with water.
Place the plant at the bottom of the beaker.
Invert a glass funnel over the plant; support the bottom of the funnel with something, like stones or pieces of plastic.
Fill the beaker with water. Fill the test tube with water. Put your thumb over the test tube so water doesn't escape (or as little as possible). Invert the water -filled test tube over the funnel.
Expose the set-up with light for several hours.
You should see bubbles rising up the funnel, and a gas accumulating at the top of the inverted test tube.
After a few hours, carefully remove the test tube.After the the water comes out imediatelly put your thumb over the test tube opening to keep the gas in. Have someone light a small piece of wood (splint), blow it out so it's "glowing"; quickly insert the glowing splint into the test tube. The splint should burst into flames, showing that the gas produced by the plant in light is oxygen.
#2) A biochemist would use an instrument called a spectrophotometer. Per chance that you don't have one of these, a simpler demonstration can be done:
Get several potted plants of the same kind. In a dark room ,expose each plant to different colored lights; red, orange yellow, green, blue/violet. Or perhaps easier, cover each leaf
with a thin layer of plastic wrap of each color mentioned above. Expose the plant to a regular indoor light source or sunlight. Light exposure should be for two or three days.
Remove each leaf after the exposure to various colors of light and immediately place them in an alcohol bath. Keep track of which leaf was exposed to what color! Boil the leaves in alcohol to remove the green color (chlorophyll). CAREFUL, alcohol is combustible! Put tincture iodine (from your medicine cabinet) on each leaf. The one( 's) that turn the darkest shows the most production of starch when exposed to that particular color of light, and was the best for photosynthesis.

Answer 2

This is a very simple project really. First, you need your Science book. Hopefully, you have read the information and have studied your terms. Then, for more research, go to the website I have provided and give it a read. Follow the instructions and do what the project advises. You should be able to determine that gas is given off and what kid as well as what kind of light is more favorable. This is a project that you have to have plants, different kinds of lighting, etc in order to determine proof. You also need a camera so you can take pictures of the steps as you see them revealed and finally, your notebook to record your findings. After that - consult your teacher.