Class Project 98


Mrs. Lee and students of Blocker Middle School would like to thank Hayes Funeral Home for providing us with the ozone machine, and College Of The Mainland for the greenhouse and assistance with materials.

Purpose: We needed to see the effects of ozone on bean plants.

Materials needed: two 2ft. planters(window boxes)

one inch of gravel

one inch of sand

four-five inches of potting soil

two 45 gallon aquariums

one ozone machine

two lb. dry ice

two aquarium covers

two themomters

three bush green beans

1/class several strips of schoenbein paper

Procedure: You may be wondering why we have to eat those icky things called vegetables, you know, those smelly green things that you try to hide in your napkin, or feed to Fido. Don't blame those years of agony on veggies it's all to blame on a little thing called minerals. Right now your probably saying minna what? Minerals are basically, well, dirt, yeah dirt. It all works out like this. Most of the dirt on our planet used to be rocks, the rocks get tossed and banged around until eventually they chip, break, and grind up into little bitty chips, which we call dirt. On those days when your stuck inside playing Monopoly with your sis and buckets of rain are pouring down from up above, your mama's petunias are getting refreshed and bombarded with minerals, I know, to you and me minerals sound like a two week old peanut butter and jelly sandwich. But to plants, all those minerals are like a years supply of ice cream sundaes. You may be a little confused as to how this has anything in the world to do with us. Actually, this has everything in the world to us. You see, we eat plants, plants eat minerals, minerals are what keeps us alive. Got the point!

VARIABLES: Controlled, Manipulated, and Responding.

Controlled: First we needed the some beans because if we had different seeds we would have different plants and that means different effects. We kept the beans in two aquariums and didn't change them because we put ozone in one of the aquariums and if we changed the plants to a different one it would mess the whole project up! The same potting soil was used in the project because some potting soils have different minerals and some of the minerals could have made the process of the plant growing faster or slower. The gravel and sand under the potting soil was used for the drainage of the water that we gave to the plants. We put the two aquariums in the greenhouse just in case it would rain, and they wouldn't be soaked and die. The aquariums covers trapped the air inside of the aquarium whether it was Co2 or just oxygen. The thermometer was used in the project inside the aquarium to tell the temperature and tell the percent of humidity of the aquarium. The window boxes were used to hold the bush green beans. We gave the green beans the same amount of water because if one had more it would probably grow faster. We put the same amount of dry ice (Co2) in the aquariums so the plants would be even in amount.

Manipulated: We put an ozone machine that released O3 into one of the aquariums and the bush green bean took it in.

Responding: The aquarium with ozone had shorter stems and no mature leaves but, the aquarium without ozone had longer stems and mature leaves.

Problems: This experiment had plenty of problems. Almost to many. Since this experiment was over Spring Break, the weather changed from cold to warm with the bean plants trapped in the aquariums with covers. After spring break we found many of the bean plants had died from the warm weather. We had to work with the surviving plants and we suggest you leave the lids off the aquariums during the entire lab. Mrs. Lee says, "When trying a lab for the first time, expect the unexpected"!