~ In an experiment for growing crystals, what factors affect the crystal size? You can check for humidity, regular shaking, growth medium, and time as factors. It is expected that caterpillars grow faster at a higher temperature and vice versa. ~ Study the effect of temperature on the growth rate of caterpillars. ~ Is there any connection between the lung capacity of an individual and increasing age? If there is, study the reasons behind it. ~ Do you know magnets negatively affect plant height? You can plan an experiment for your science fair project out of this too. The findings will be useful for preparing sterile nutrient media and performing other scientific experiments. ~ Study the reliability of sterilization techniques for killing pathogens from glassware and equipment in hospital settings. ~ Are there nutritional differences in the canned, fresh, and dried forms of the same vegetable? If yes, which is the most nutritious type for consumption? ~ How do nocturnal animals hunt food in the dark? You can check out the adaptations of some commonly known nocturnal birds and animals for the science fair project. ~ Is there any connection between wound healing and applying band aids? Which one heals faster, with band aids or without band aids? For this project, you can use bulbs of different watts (25, 40, 60, and 75 watts) as heat sources. ~ Study the effects of heat on the rate of evaporation of water. ~ To examine how a volcano erupts in nature, you can make an erupting volcano with easily available supplies for your science fair project. ~ Grapefruits are very juicy fruits, but how much amount of a grafefruit is water? The result is most likely to fall between 60 – 80 percent. ~ Is it possible to graft a tomato stem onto the rootstock of a potato plant? You can conduct this project with other shoot and root vegetables. ~ Is there any correlation between decreased transpiration in plants and presence of pollutants in the atmosphere? Does increased air pollution affect the stomatal openings? You will find positive for plants, while animals can exhibit either positive or negative phototaxis. ~ Analyze phototaxis in plants and animals. With this, you can separate the active ingredients of a plant extract. ~ Try a chromatography experiment to find out the constituents of a mixture. ~ Is there any difference between the stars that we see in the sky? And what about the successive stages of the stars? ~ What is the phenomenon behind blue coloration of the sky? In addition, try to find out the color of mountains and water bodies from far away. ~ For washing clothes, does the amount of detergent affect the result? Is it best to use the amount recommended in the product package? ~ Does presence of salt in water affect the process of ice formation? Check out whether it slows down or fastens condensation.
~ Which fruits and vegetables have the greatest charge? For this, you will require a multimeter and some commonly found fruits and veggies. According to the result, you can conclude the safety of milk for consumption. ~ Examine the presence of bacteria and microbes (if any) in pasteurized and unpasteurized milk samples. ~ Are you aware about the presence of microbes in our mouth? Prepare a petri dish with a nutrient medium, blow air to it, incubate for some days, and check out the microbial colonies. ~ What can you do to fasten the germination time of hard seeds? Over here, you can use the methods of soaking in cold water, soaking in hot water, chemical treatment, and poking holes in the seed coat. Are there ways to decrease the use of pesticides for growing crops? ~ Pesticide runoff from cultivated areas is a major contribution to environmental pollution. ~ What are the possible impacts of acid rain on buildings, monuments, crops, ecosystem, and overall environment? ~ Which types of wood burn at a faster rate and why? You can take softwood and hardwood samples for the project. More 8th Grade Science Fair Project Ideas Compare this with another algal specimen of the same species, kept in plain water. In this case, due to high salt concentration, water from the cell moves to the surrounding areas, resulting in a plasmolyzed cell. You will find the cell becoming constricted due to the process of osmosis. Then, observe the treated alga under a microscope.
Prepare a hypertonic (higher concentration) salt solution and keep the alga in this solution for about 15 – 20 minutes. You can consult your class teacher and ask for any one of these. For this plant cell experiment, take simple algal species, like spirogyra or chlorella.
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