 | What are bioassays and how effective are lettuce seeds as bioassays?
The idea behind a reference toxicity test is that the test organism, in this case lettuce seeds, will respond in a predictable manner to varying concentrations of a particular chemical compound. At some threshold concentration, all of the test organisms will be killed (or in this case, none of the lettuce seeds will sprout). In solutions that are more dilute, some level of inhibition will occur in |
| | Difficulty: High school |
| What are the conditions necessary for seed germination?
The following experiments with plants can be used progressively through the plant units in the K-6 science curriculum. They are all based upon growing seeds in a sterilized baby food or Snapple ® jar filled with 3/4 inch of unflavored gelatin to which a few drops of liquid house plant fertilizer has been added for nutrients. |
| | Difficulty: Elementary school |
| What effect do magnets have on the growth of seedlings?
The purpose of this experiment is to determine whether magnets have an effect on the growth of radish seedlings. I became interested in the study of the effect magnets, when I discovered that magnets could make you heal faster. Later I decided that that it would be a better idea to study the effect of magnets on plants to keep it a safe experiment.
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| | Difficulty: Middle school |
| What effect do tobacco and alcohol have on seed germination?
The purpose of this experiment is to see if tobacco and alcohol have an effect on seed germination. According to the hypothesis the tobacco and alcohol will effect the rate of seed germination. This may be related to the effect alcohol and tobacco have on humans. |
| | Difficulty: Elementary school |
| What effect does gold dust have on radish seeds?
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 |
| | | Difficulty: Elementary school |
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| | | Difficulty: High school |
| What is photosynthesis and do plants need sunlight to photosynthesize?
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 |
| | | Difficulty: Elementary school |
| | | Difficulty: High school |
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Science kits, science lessons, science toys, maths toys, hobby kits,
science games and books - these are some of many products that can
help give your kid an edge in their science fair projects, and develop
a tremendous interest in the study of science. When shopping for
a science kit or other supplies, make sure that you carefully review
the features and quality of the products. Compare prices by going
to several online stores. Read product reviews online or refer to
magazines.
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