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Topics  > Biology  > Botany
Since leaves do not have the materials they need to survive in the winter and fall, their leaves die and loose the green color.
Difficulty: Elementary school
Mariotte siphons or Mariotte bottles (figure 1) are devices that provide a constant pressure that will deliver a constant rate of flow from closed bottles or tanks. The flow rate will depend upon the head as defined in figure 1 and not on the height of the free water surface. These devices find many uses where a nonchanging pressure is needed. One application in agriculture is for applying liquid
Difficulty: High school
Of all the organisms in the natural world, green plants are the only ones that manufacture their own food. This process is called photosynthesis and begins when light strikes the plant's leaves (both sunlight and artificial light can power this process). Cells in the plant's leaves, called chloroplasts, contain a green pigment called chlorophyll which interacts with sunlight to split the water in
Difficulty: Elementary school
The purpose of this lab exercise is to provide you with an opportunity to become familiar with common methods of vegetative (asexual) propagation.
Difficulty: Elementary school
If you've ever planted seeds in the ground, perhaps you have wondered just how do they know which way to grow. How do the roots know to grow down and how do the stems and leaves know to grow up?
Difficulty: Elementary school
The propagation of plants is a very important aspect of life due to the importance of plants. The ways in which plants can be propagated are discussed due to the time that it takes to grow a plant. The fastest and most efficient way to grow plants is wanted by all the industries that produce the plants for society. I have decided to determine the fastest way of propagation by testing how cuttings
Difficulty: Middle school
What is PH and how does it affect the suitability of soil for plant growth?
Difficulty: High school
Is it more effective to sprout seeds in jars rather than in cloth?
Difficulty: Elementary school
The purpose of this project is to see if gasses released in smoke enhance the germination rate of black pine seeds. I hypothesize the seeds exposed to the NO2 gas will have the highest germination rate. In order to determine if gasses released in smoke enhance the germination rate of black pine seeds, black pine seeds were obtained.
Difficulty: Middle school
The purpose of this experiment is to see what effects gold powder has on the growth of radish seeds, if any. It is predicted that the larger amounts of gold will not increase the germination rate of the radish seeds. It is predicted that the larger amounts of gold will not increase the germination rate of the radish seeds.
Difficulty: Middle school
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