Easy Science Fair Projects for 7th Grade

Students in the seventh grade are excited about science fairs conducted by schools, since it gives them an opportunity to showcase their creativity and knowledge. And it's fun learning about the scientific principles and concepts that are associated with them.

According to the grade, topic ideas vary in complexity. Some easy science fair projects for 7th grade are given in this story. The materials used here are very simple to procure. You can demonstrate them easily in middle school.

All of us know that oil spills pollute enormous amounts of water, and it's hard getting rid of this oil contaminant from water. To perform this experiment:

Apparatus

• Heavy grade motor oil
• Water
• Jars
• Cheesecloth
• Spoon
• Sand

Procedure
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, you can strain by using cheesecloth, you can scoop it using spoon. You can try to explain the applicability of this activity in day-to-day life.

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.

Apparatus

• 4 varieties of soda (Aerated drinks)
• Cap Opener
• Opener
• Tape

Procedure
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.

Apparatus

• Wooden Plank
• Paper-mache
• Salt dough
• Bottle
• Baking Powder
• Washing Powder
• Red Coloring
• Vinegar

Procedure
Buy a wooden plank from a garage. Now, with paper-mache and salt dough, create a volcanic mountain around the bottle. 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 activities.

Apparatus

• Beaker
• Test tubes
• Rods of graphite
• Water
• A 12 V battery as a DC source
• Sulfuric acid acting as an electrolyte
• Copper wire

Procedure
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 simple chemistry ideas.

Apparatus

• Music stand
• Protractor
• White light
• Multimeter

Procedure
Using the music stand, adjust the angle of exposure of a solar cell to white light. Use the multimeter to record the output in milliwatts on multimeter. Record the milliwatts produced for different angles, including the 90 degrees angle. You will notice that 90 degree location gives maximum output.

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