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Wow! Great info.

What if we just looked at the effects of sunlight?
(Put a plant in the dark, one in the direct sunlight, one in the shade)

Don't forget the controlled variables - the things we keep the same to make sure it's a fair test.

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We don't have the right supplies to do the experiment so instead I will conduct a research task.

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How do different colours affect plant growth?

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How do different colours affect plant growth?

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- Green lights are the least effective to plant growth
- Blue light is the most effective
- Red combined with blue helps the plants flower
- cool fluorescent lights help plants grow indoors.

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Sometimes a plant will not get enough light and will have problems with too little light. Plants affected by light shortages or too little blue light will have the following signs:
-Stems will be leggy or stretched out
- Leaves turn yellow Leaves are too small
- Leave or stems are spindly Brown edges or tips on leaves - Lower leaves dry up

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Plants are affected by light that falls into the “blue” spectrum of the light scale. Daylight, fluorescent light and grow lights all have “blue” tones in them and will help provide the light your plant needs. Incandescent and halogen lights are more “red” and will not help your plant grow.

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Plants get energy from light which is called photosynthesis. This is how light affects the growth of a plant. Without light, a plant would not be able to produce the energy it needs to grow.

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In this experiment, students can monitor how different types of light affect plant growth. A student will start with three plants of the same type (flowering plants generally work best) planted in similar soil and holders. One can be placed in an area of high sunlight exposure, another in an area of medium light exposure and another in an area with little exposure to the sun. Over the period of a week or two, teens can monitor how each plant grows.
Source - http://teens.lovetoknow.com/High_School_Biology_Experiments

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http://teens.lovetoknow.com/High_School_Biology_Experiments

How Light Affects The Growth Of A Plant & Problems With Too Little Light https://www.gardeningknowhow.com/plant-problems/environmental/how-light-affects-the-growth-of-a-plant-problems-with-too-little-light.htm