8th Grade Science Projects

Instructor: Felicia Landry

Felicia has a bachelor's degree in journalism and has been a writer for the past 23 years.

Looking for hands-on science projects for your eighth graders? Here are a few fun project ideas to engage your students and pique their interest in this subject.

Which Beverages Release the Most Gas?


Plastic bottles, balloons, vinegar, heating pad, water, soda, juice and milk

How It's Done:

  • Students begin by mixing equal amounts of each beverage into different plastic bottles then adding two teaspoons of vinegar into each beverage; the vinegar represents stomach acid.
  • A balloon is then placed over the opening of each bottle and bottles are placed on a warm heating pad.
  • As the liquids begin to heat up, students observe the balloons at different intervals, noting which liquids have inflated balloons, which are more inflated and how the inflation relates to the amount of gas.

Eighth graders can watch an engaging video lesson to review the properties of gases, and how to calculate the volume of gases. Another lesson will ensure students understand how to calculate the density of gases.

Does Stress Affect Body Temperature?


Basal thermometer, stopwatch, test subjects and a notebook for writing the results

How It's Done:

  • Students ask test subjects to rate their stress level using a scale of 1 to 15.
  • Subjects' body temperatures are recorded.
  • Student ask their test subjects to perform a difficult task, such as having to solve a large amount of science problems in only a few minutes.
  • Stress levels and body temperatures are recorded again immediately after the task.
  • Students analyze and present their data.

Students can check out another lesson to review the difference between basal body temperature and body temperature. Students will understand why there can only be small changes in body temperature by watching a video lesson on temperature regulation.

What Effects Do Carbonated Drinks Have on Meat?


½ pound fresh steak, ½ pound fresh chicken breast, ½ pound fresh salmon steak, three large bowls and six cans of Coca Cola

How It's Done:

  • Students place each kind of meat in a bowl.
  • The meats are then completely covered by the soda, using two cans in each bowl.
  • Students check on the meat for several days to see whether it dissolves.
  • Students discuss their findings.

Students can learn more about carbonic acid in a lesson on weak acids and bases.

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