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Mung bean lab report - examining the effect of light on growth.

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Introduction

Materials: 1. At least twenty mung bean seeds 2. Two clean 2-Liter soda bottles 3. Paper towel 4. Water Procedure: First shred a large amount of paper towel into Quarter-sized pieces. Fill each bottle with the paper towel shreds until they are about one-sixth of the way full. Slowly and carefully fill each bottle with water until each piece of paper towel is wet. Make sure the paper towels don't clump together in the bottle. Now place at least ten mung bean seeds in each bottle and cap the top after you have done so. ...read more.

Middle

Hypothesis: The mung bean sprouts that grew in the light is will be taller than the mung bean sprouts that grew in the dark. Observations: * The mung bean sprouts that grew in the dark did not produce any leaves. * The stems of the mung sprouts that grew in the dark environment were of a white/yellow color while the stems of the mung bean sprouts that grew in the light environment were of a green color. * The mung bean sprouts that grew in the dark were crisper in texture, than the mung bean sprouts that grew in the light. ...read more.

Conclusion

The average height of the seedlings that grew in the dark is greater than the average height of the seedlings that grew in the light. The seedlings grew taller in the dark because they used all their energy to grow to find a source of light. But even though they grew taller, the mung bean sprouts that grew in the dark were significantly weaker than the mung bean sprouts that grew in the light. Sources of error included wetting the paper towels with alcohol instead of water and pouring too little water into the bottle. ...read more.

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