Testable question: Will a radish plant grow towards a magnet? Hypothesis: If we put a magnet next to a radish plant the radish will grow towards the magnet because we think since a radish grows shorter next to a magnet then it will grow towards a magnet too. Background Information: -Radishes grow shorter next to magnets -Magnetism is the force that electric currents exert on other electric currents Experimental Variables: One of the radishes will have a magnet next to it, and the other wont Control Variables: Same temperature, amount of water, pots, amount of sunlight, radish seeds, and soil. 6 radish seeds in each pot 1 magnet that holds 100 pounds 2 pots 800 milliliters of soil in each pot 1 2-foot piece of rebar 2 feet of duct tape Gather all materials: 2 pots, 1 magnet, 1 pack of radish seeds, 1 piece of rebar, duct tape, and soil Put 800 milliliters of soil in each pot Put 6 radish seeds ½ of an inch down in the soil Get the piece of rebar and duct tape the magnet to the rebar. Then put the piece of rebar in the soil so the magnet is facing the radish. Water every other day. As it grows, if the radish grows towards the magnet, record how much every week. Date Magnet No Magnet 11/12 1 cm. Sprout No Sprout 11/14 2 cm. tall 1 cm. Sprout 11/22 Growing Growing straight up 3cm straight up 2 cm 11/29 Growing Growing straight up 5 cm straight up 4 cm bs er va tio n O 1 bs er va tio n O 2 bs er va tio n O 3 bs er va tio n 4 O 6 5 4 3 2 1 0 Magnet No Magnet The plant with the magnet ended up not growing towards the magnet, but it did grow 1 cm. taller than the plant without the magnet. Compare: Both plants grew straight up; Both plants looked the same Contrast: The plant with the magnet grew 1 cm. taller than the plant without the whole time The radish plant with the magnet grew 1 cm. taller than the radish without the whole time. Our hypothesis was incorrect because the radish plant with the magnet grew straight up The rebar that was holding the magnet up was metal, so it might have affected the magnetic field Instead of using a piece of rebar we would use a wooden stick Our recommendations are that magnets don’t have any affect on plants Radish picture “Radish”.11/29/2010.theora.com/images/radish.j pg Magnet picture “NibMagnet”.11/29/2010.www.thomasnet.com/… /nib-magnet.JPG Project Idea DoMagnetsAffectRadishPlantGrowth?.11/30/201 0.//www.free-science-fair-project.com/FreeScience-Fair-Project.aspx?ProjectID=7&Title= DoMagnetsAffectRadishPlantGrowth?. Magnet information Schwartz, Brian B., and Richard B. Frankel. "Magnetism." World Book Advanced. World Book, 2010. Web. 30 Nov. 2010. Thanks to… Julie Cia Julie Rabin Mr.Pham