How Does Being Watered With Different Liquids Effect Plants' Growth? My Science Experiment
2011 In my science experiment, I am trying to figure out which liquid works best for watering plants... water, milk, orange juice, apple juice, Sprite or Diet Coke. HYPOTHESIS PROBLEM IF I “water” my bean plants with water, milk, orange juice, apple juice, Sprite and Diet Coke, THEN, the bean plant watered with water will grow the tallest, BECAUSE, anybody with a fifth grade education knows that plants are almost always watered with water! The independent variable in my experiment is watering my bean plants with different types of liquids. The dependant variable in my experiment is the bean plants’ heights. I will measure my dependant variable using a centimeter ruler. The control variables in my experiment are the amount of sunlight and liquid for the bean plants. VARIABLES To make sure all are safe in this experiment…...
-I had adult supervision while planting the beans
-I had the plants inside by a window so they can get sunshine but no rain. If rain fell into the plants, it would interfere with what I am trying to find out with my experiment.
-Instead of using flowerpots, I used plastic cups. That way, if a plant fell over, it wouldn’t have broken a pot. That prevented any injuries. Plus, it prevented the plant to lose its containment unit. SAFETY CONCERNS DATA MEASUREMENTS In my hypothesis, I stated that water was the best liquid to use when watering plants (compared to milk, orange juice, apple juice, Sprite and Diet Coke). After trying to grow plants A though F for 3 ½ weeks, I realized my hypothesis was correct. Plant A, which I watered with simple tap water, grew the tallest, at 48 centimeters tall!
At first, I believed that only Plant A would actually sprout, so I was a bit nervous. But, I was very surprised to find that by the third check, Plant A and Plant F were about tied in height! Almost all of the plants had sprouted, and actually grew amazingly, compared to my prediction. After doing this experiment, I realized another one could come into play: “How Does the Amount of Water Change a Plant’s Growth?” And, hey… maybe someday it’d be fun to experiment in trying to make Diet Coke flavored beans! CONCLUSION PROCEDURE The steps for my project are....
1. PLANT THE BEANS. Take the bean seeds and plant them as directed on the package.
2. LABEL. Stick the labels onto the cups and label A-F.
3. WATER. Water plant A with 1/4 cup of water. Water plant B with 1/4 cup of milk. Water plant C with ¼1/4 cup of orange juice. Water plant D with ¼1/4 cup of apple juice. Water plant E with ¼1/4 cup of Sprite. Now, water plant F with ¼1/4 cup of Diet Coke.
4. REPEAT. Follow directions of step three once a day until the conclusion of the experiment.
5. RECORD DATA. Twice a week, or on any regular basis, record data of height change in the notebook. (You will still be following step 3 once a day.)
6. CONCLUDE. Take the final measurement change and identify the final growth change. Now, you will be able to see which plant grew tallest. Therefore, you will find out which liquid works best as “water” in the cycle of growing
Doing some research, I learned…...
1. There are environmental factors affecting plant growth such as temperature, water supply, and supply of mineral nutrients.
2. If you have too many mineral nutrients, the plant will die. This is the same for water supply.
3. Milk has lots of mineral nutrients, and so does orange juice, and soda has some. So this information will definitely affect plant growth.
4. Once the water goes into the plant through the roots, it travels to the leaves. Then it moves through the xylem vessels and spreads throughout the plant.
5. If a plant gets too much water, the roots will rot and the plant cannot get oxygen. This is how the plant dies (see fact 2). But if there’s not enough water, nutrients can’t get to the plant; this also causes the plant to die.
6. Water helps the plant stand tall by delivering nutrients to it. This is why a plant droops over when it’s dying of thirst. A liquid with the right amount of nutrients will help the plant grow.
7. Water can be split up into the two things that it’s made of- hydrogen and oxygen.
8. Other liquids aren’t necessarily made of hydrogen and oxygen, so the effect on plant growth will change.
9. Cellular respiration is something a plant uses as help for growing. It is glucose combined with oxygen, making carbon dioxide and water, which releases energy; the energy helps the plant grow. RESEARCH To perform my experiment, I will need…...
• -Plastic cups (6)
• -Bush Snap Garden Bean seeds (6)
• -Supply of water
• -Supply of milk
• -Supply of orange juice
• -Supply of apple juice
• -Supply of Sprite
• -Supply of Diet Coke
• -¼1/4cup liquid measuring cup
• -Notebook & pen (to record data)
• -Centimeter ruler MATERIALS PLANT A: Took about a week of no growth, and then popped up out of nowhere! It grew a lot at first, and then started growing a bit slower. Plant A was a success! PLANT B: Hadn’t grown a single centimeter out of the ground! It grew mold, and almost all of the milk, as soon as it was poured, had flown right through the soil and through the bottom of the cup. Plant B… had not the best outcome. PLANT C: Grew, but slowly. It had also grown mold, because orange juice spoils. It grew, unexpectedly. But I thought, if it grew, it would grow to be much higher. Plant C had met, yet failed, my expectations. PLANT D: Really surprised me! I really thought that apple juice wouldn’t work out well. But, surprisingly, Plant D grew most out of all of them, EXCEPTING Plant A. Plant D had a great outcome!
PLANT E: Had an “okay” outcome. Being watered with Sprite, it grew amazingly! But compared to other plants, hadn’t grown that much. Plant E went pretty well.
PLANT F: Was a confusing little plant! At first, Plant A and Plant F were tied! Is that hard to believe? Well I have my data measurements to prove it. But then it grew slower and slower…. until it was actually the 4th tallest plant. Plant F really surprised me. OBSERVASTIONS The following is what I observed of my plants over time. Oh! Let's not forget... BIBLIOGRAPHY 1. Broome, Stephen. “Factors Effecting Plant Growth.” Department of Soil Science at NC State University, Main Page. N.p., n.d. Web. 18 Feb. 2011
2. Armstrong, Shari. “How Does Water Effect Plant Growth.” Gardening Know How- Gardening is Easy! Let Us Show You How. N.p., n.d. Web. 20 Feb. 2011
3. “Processes of Living Things- Chapter 4” Harcourt Science  Orlando: Harcourt School Publishers, 2000. A98 and A99.
So, that's what I studied for my 5th grade science fair. Hope you enjoyed! Feel free to comment, ask questions, and critique! This is... THE ENDSee the full transcript