Twelfth Grade Science Experiments (Page 133)

How Does Packaging Affect the Ripening of Fruit?

Science Fair Project Idea

Scientific Method

Why do different types of fruits come packaged in different ways? In this project, you will experiment with different ways of packaging fruit to see if it has an effect on the freshness of the fruit. Will a different kind of packaging allow the fruit to stay fresh longer? Read more

How Does Robot Behavior Affect Human-Robot Interaction?

Science Fair Project Idea

Scientific Method

Industrial robots, medical robots, service robots, household robots, companion robots—humans and robots are around each other in an ever-increasing number of situations. How robots look and act can have a big impact on how humans react to and feel about them. In this science project, you will program a robot with different behaviors to see how people react. Can you make people feel comfortable alongside the robot? Read more

How Does Snow Cover Affect Solar Panel Power Output?

Science Fair Project Idea

Scientific Method

What happens when solar panels get covered in snow in winter? Does some sunlight make it through the snow? Does the power output of the panels drop considerably? Is it worth it to go scrape the snow off the panels if temperatures will remain below freezing? How hard is this to do for rooftop solar panels or a large solar farm? These are all questions you can answer yourself in a science project using a small solar panel and a multimeter (Figure 1). You can follow a procedure similar to those… Read more

How Does Soil Change with Depth?

Science Fair Project Idea

Scientific Method

What covers less than 10% of the Earth's surface, yet is a vital natural resource for terrestrial life? What filters ground water and supports most of our food production, not to mention the production of building materials and paper? The answer, often overlooked, is: soil. With this project you can get all the dirt on soil formation, soil horizons, and the composition of different soils. Read more

How Does Spark Plug Gap Affect Engine Performance?

Science Fair Project Idea

Scientific Method

Do you know what a spark plug is? Have you ever replaced an old, dirty, or worn out spark plug in an engine? These small parts are crucial to the operation of internal combustion engines. In this science project, you will find out how "gapping" a spark plug affects engine performance. Can you get more power or better fuel economy out of your engine by changing the spark plug gap? Try this project and find out! Read more

How Does Your Eardrum Work?

Science Fair Project Idea

Scientific Method

Eardrums are membranes inside your ears that vibrate when sound waves hit them. These vibrations are converted into electrical signals and sent to your brain, which allows you to hear sound. The frequency response of your eardrum, or the range of frequencies that will cause it to vibrate, determines your hearing range. Typical human hearing ranges from about 20 Hz up to 20,000 Hz, although the ability to hear high frequencies typically degrades as you get older. Some other animals can… Read more

How Empty Is an Empty Bottle?

STEM Activity

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Did you know that airplanes and sound have something in common? Can you guess what it might be? Air pressure! It is fascinating how air—something that is so fluid and invisible—can power an amazing number of fascinating phenomena. In this activity you will use your own breath to blow a small paper ball into an empty bottle. It sounds simple, but is it? Try it out and see for yourself! Read more

How Far Away Is the Moon?

Science Fair Project Idea

Scientific Method

Let's suppose you can take advantage of the Internet and get a 'pen pal' located a 1000 miles away in another city. On the same night, and at EXACTLY the same time 'Universal Time', make a CAREFUL observation of where the Moon is located with respect to the background stars. You should be able to discern a slight (about 1/2 the Moon's diameter) shift in position due to parallax. Then, with a little geometry, you could estimate the distance of the Moon during the full lunar cycle (Odenwald,… Read more

How Fast Can You Get It Done?

STEM Activity

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Do you hate doing the dishes, folding laundry, or cleaning up your room? Do you wish you could figure out a way to get these tasks done faster? Figure out how as you take on the role of a production engineer in this fun activity! Read more

How Fast Do Seismic Waves Travel?

Science Fair Project Idea

Scientific Method

Have you ever wondered how fast a seismic wave from an earthquake travels? In this geology science project you can figure this out using historical seismograph data that you can collect from the comfort of your own computer. You will use a web interface to a network of seismometers run by the Northern California Earthquake Data Center, at the University of California, Berkeley. From the seismograms you make, you will be able to measure the time it took for the seismic waves to travel from the… Read more

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