Science experiments for seventh grade students require them to find a theory or question to be tested, form a hypothesis, collect data and make a conclusion. These middle school children have moved out of the elementary phase and are capable of handling more advanced projects, so the experiment should be something a student can do independently. Let them choose from a variety of topics and have the full range of science options to work with.
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Moldy Cheese
For this experiment, the student will test which type of cheese grows mold the fastest. Different types of cheese are put on individual paper plates and set in the same area. It is important to make sure that none of the cheese gets more or less sunshine than the others and that the conditions are the same for all of the specimens. Each day at the same time, the student will take a picture of the cheese and record the data. Continue this until one type of cheese has mold. The experiment can be continued to see if multiple types of cheese grow mold at the same rate and which type resists it the longest.
Musical Growth
To determine if classical music helps plants grow faster, students may observe and record the growth of seedlings that have been exposed to classical music and those that have not. Place six bean plants of equal size in the same type of plastic cups and potting soil. Poke holes in the bottom for drainage. Put two cups in a room with classical music playing for one hour each day. Place the other two in a quiet room and put the last two cups in a room with moderate noise. Be sure that each set of cups is in an area that will receive the same amount of sun as the others. Record the growth of each set of plants at the same time every day for up to a month. At the end of the time period, the student will be able to determine if classical music helps, hinders or does not effect plant growth.
Crystals
With a parent's help, students may test the effect of heat on crystals by warming various types of salt in dry test-tubes. After heating, put the base of a delivery tube (a test-tube with a straw that that extends from the hot crystals to another test-tube) in a cup of cool water and collect the condensation. Put a drop of condensation from each salt heated on white copper sulfate powder. Some of the drops will turn the copper sulfate powder blue indicating that these crystals contain water, while the others do not.
Earthworms are valuable for elementary science lessons about how living things protect themselves from danger and how they react to various stimuli....
