Easy Science Fair Projects for 7th Grade

Students in 7th grade are excited about science fairs conducted by schools, since it gives them an opportunity to showcase their creativity and science knowledge. And it's fun learning about the scientific principles and concepts that are associated with these easy science projects. According to the grade, topic ideas vary in complexity.

The materials used in these projects are very simple to procure. You can demonstrate these middle school science projects easily.

How to Remove Oil Pollutants from Water: All of us know that oil spills pollute enormous amounts of water and it's hard getting rid of this oil contaminant from water. Take water in several jars and add motor oil of heaviest grade into these containers. You can now demonstrate 3 ways to remove oil from this water. You can use sand to settle the oil at the water bottom or you can strain by using cheesecloth or you can scoop it using spoon. You can try to explain the applicability of this project in our day-to-day life.

Fizz in Soda: Fizz is nothing but carbonated water and more the sugar in soda, lesser the fizz it will have. We will simply try to compare the fizz contained in soda. For this, take 4 varieties of soda such as mountain dew, coke, regular Pepsi and cherry Pepsi. To measure the fizz in different soda, simply, take off the cap of the bottle and wrap a balloon around it. Now shake the bottle. With the tape, measure the width of the balloon. Do it for all the 4 types of soda to find out the one with maximum fizz.

Active Volcano: Buy a wooden plank from a garage. Now, with papier-mache and salt dough, create a volcanic mountain. Now, close the bottle mouth tightly, with an opening for volcano. Paint the mountain created and prepare elevations to resemble a natural one. Blend 1 tablespoon baking powder, 1 tablespoon dish washing powder and a little red color. Once you add ½ cup vinegar to this mixture, you can see a volcano erupting with a little explosion. This is one of the interesting science fair project topics for 7th graders.

Water Electrolysis: You need a beaker, test tubes, rods of graphite, water, a 12 V battery as a DC source, sulfuric acid acting as an electrolyte and a copper wire. Fill ½ beaker with water and put 2 test tubes upside down in beaker. Mount the graphite electrodes in the beaker and do the electrical connections. This is just a simple demonstration of the process of electrolysis of water. Record the hydrogen and oxygen produced when the electrolysis takes place. You can repeat this experiment by using different electrodes and electrolytes and do the analysis. It is one of the easy chemistry project ideas for 7th graders.

Solar Cell Exposure to the Sun: You will need a music stand, protractor, white light and a multimeter. Use the music stand to adjust the angle of exposure of a solar cell to the white light. Use the multimeter to record the output in milliwatts on multimeter. Record the milliwatts produced for different angles, including 90 degrees angle. You will notice that 90 degree location gives maximum output. This is one of the easy physics project ideas for 7th grade science fair.

These were some easy science projects. These are simple ideas and are exciting to learn projects based on scientific concepts. You can make a simple presentation based on the findings as well. I hope you liked these easy ideas.