SCIENCE PROJECT IDEAS - LEVEL 3

1.  What type of line carries sound waves best? 21.  Which way does the wind blow most frequently?
2.  Can the sun's energy be used to clean water? 22.  Does the size of a light bulb affect its energy use?
3.  Does a green plant add oxygen to its environment? 23.  For how long a distance can speech be transmitted through a tube?
4.  Which metal conducts heat best? 24.  Which grows mold faster - moist bread or dry bread?
5.  What percentage of corn seeds in a package will germinate? 25.  What type of soil filters water best?
6.  Does an earthworm react to light and darkness? 26.  Does the color of a material affect its absorption of heat?
7.  Does the human tongue have definite areas for certain tastes? 27.  Does sound travel best through solids, liquids, or gases?
8.  Can same-type balloons withstand the same amount of pressure? 28.  Do sugar crystals grow faster in tap water or distilled water?
9.  Does the viscosity of a liquid affect its boiling point? 29.  Can you see better if you limit the light that gets to your eye?
10.  Does surrounding color affect an insect's eating habits? 30.  How much of an apple is water?
11. Do children's heart rates increase as they get older? 31.  What common liquids are acid, base, or neutral?
12. Can you use a strand of human hair to measure air moisture? 32.  Do taller people run faster than shorter people?
13.  What materials provide the best insulation? 33.  Does the length of a vibrating object affect sound?
14.  Is using two eyes to judge distance more accurate than using one eye? 34.  Does a plant need some darkness to grow?
15.  Do different kinds of caterpillars eat different amounts of food? 35.  Who can balance better on the balls of their feet - boys or girls?
16.  What plant food contain starch? 36.  Does exercise affect heart rate?
17.  What keeps things colder - plastic wrap or aluminum foil? 37.  Which dish soap makes the longest lasting suds?
18.  Does heart rate increase with increasing sound volume? 38.  What are the effects of chlorine on plant growth?
19. Do boys or girls have a higher resting heart rate? 39.  Which type of oil has the greatest density?
20. Do liquids cool as they evaporate? 40.  How accurately do people judge temperatures?