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Possible Science Fair Topics
Grades 6 to 8

This list is not meant to be all-inclusive. Rather, it should be used to stimulate and encourage other ideas and possibilities on the part of the students. There is certainly lots to explore, lots to discover, and lots to investigate in a science fair.

  • How water rises in different kinds of plant stems
  • Forming compounds
  • How heating water affects the rate at which materials dissolve
  • Factors affecting how fast liquids will mix
  • Freezing points of different liquid substances
  • What metals and/or materials will rust?
  • Good and poor conductors
  • Are there particulates in the air we breathe?
  • What materials are biodegradable?
  • The effect of different kinds of physical activity on pulse rates
  • Sprout seeds without using soil
  • Atoms
  • How glaciers change the land
  • Constellations
  • The circulatory system
  • Eclipses of the sun and moon
  • Tides
  • What is photosynthesis?
  • What is respiration?
  • Invertebrates
  • Reptiles and amphibians
  • Gestation periods of different mammals
  • Endangered and threatened species of animals and/or plants
  • Environmental effects on the size of animal populations
  • Succession in an ecosystem
  • Electricity
  • Major sources of energy
  • The "Greenhouse Effect"
  • Nuclear energy
  • Ways to conserve energy
  • Physical and chemical weathering
  • Weather records and extremes
  • The life cycle of a star
  • Fossil fuels
  • Solar heaters or cookers
  • Can nonliving things grow?
  • Factors affecting germination
  • The effect of salt water and other liquids on plant growth
  • Cell reproduction
  • How our eyes distinguish color
  • Different types of satellites
  • Major nerve pathways in the body
  • The parts of a cell
  • Tissues, organs, and systems in the body
  • The migration patterns of selected birds
  • How the human body reacts to exercise and inactivity
  • The development of the atomic theory
  • Benefits of recycling
  • Earthquakes
  • What causes volcanoes?
  • The phases of the moon
  • Computers in the field of science
  • Phototropism
  • Ways to slow down plant growth
  • Effects of smoking
  • Laser beam technology
  • Drinking and driving
  • Robots
  • Rockets into space
  • Space probes

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