Science fair projects provide 7th graders with an excellent opportunity to expand their scientific horizons and practice presenting findings to others. Entering science fairs also teaches children the art of public speaking!
This fantastic science experiment illustrates how charcoal powder purifies water. All you need are some dirty water, charcoal powder and some jars!
Motor Oil Experiment
Young teens studying biology, chemistry, physics and astronomy can use science fairs as an invaluable way to pose questions and conduct experiments that lead to answers. Equipped with ideas and supplies necessary for scientific inquiry, students can test how charcoal powder (used in water filtration systems) purifies water; determine if salt prevents freezing; or step into Linnaeus’ shoes in studying taxonomy.
To test whether motor oil removes pollution from water, ask your students to fill three identical jars with normal water and half of that amount of motor oil. Use spoon, cheesecloth and sand filter testing techniques on the effectiveness of each method; document their results after testing each method. Observe their findings and document your results! Additionally, guide them in discovering whether white candles burn faster than colored candles through this straightforward project; other great 7th grade science projects could include studying photosynthesis or creating an exploding Jack-o’-lantern.
Salt Effect in Water
Science fair projects for 7th grade help students explore and comprehend topics which may be difficult to comprehend. Engaging in engaging experiments allows them to discover biology, chemistry and physics concepts outside the confines of classroom learning environments.
Experiments such as testing whether an egg will float or sink in salt water provide an easy yet enjoyable science activity for children to learn about density; salt water contains more dense ions than freshwater, making the salt solution denser than freshwater. Furthermore, testing whether an egg floats or sinks introduces kids to the concept of ion-dipole forces which connect oppositely charged atoms within water molecules through electricity charges that attract each other and attract oppositely charged atoms together into one water molecule.
Another interesting project demonstrates how salt in water can cause it to form spheres instead of clumping together, providing an ideal way of demonstrating group formation and taxonomy (classifying different organisms). Furthermore, students learn about how the crystalline structure of salt plays an essential role in water purification as its slow evaporation rate makes for less waste water production.
Plant Growth
7th grade students are learning the scientific method in experiments related to biology. Additionally, they’re beginning to see where different branches of science like chemistry, physics and astronomy overlap with one another.
Plants use capillary action to move water up their stems using tubes (xylem) attached to their leaves – an excellent demonstration of the relationship between light and plant growth.
Kids can explore Linnaeus’ world by creating their own system of taxonomy with dried beans in this fun science experiment, which can be completed both individually or collaboratively allowing students to compare results of systems.
Lighting Effects
Biology, chemistry, physics and astronomy provide seventh graders with ample exploration opportunities. Participating in a science fair allows students to narrow down their focus to one branch of scientific inquiry.
Students conduct this experiment to explore how plants appear under various lighting conditions. By using a flashlight and colored cellophane, they will observe wavelengths being either absorbed or reflected back, thus creating color patterns.
Explore density with this classic chemistry experiment by floating or sinking liquids, using balloons as buoyancy indicator and learning about gravity with this engaging physics project. Grow epsom salt crystals overnight as part of an easy chemistry project or turn your own chromatography strips into fun science-based craft; glow-in-the-dark oobleck is another fun way of studying light refraction; also try exploring how water affects soil in this easy chemistry experiment or examine how bacterial growth alters surfaces by performing this bacteriology experiment!