Twelfth Grade Science Experiments (Page 43)

Build Your Own Radon Detector

Science Fair Project Idea

Scientific Method

Electronic devices can be designed to detect dangerous fumes or other hazards, such as smoke or carbon monoxide. In this electronics project, you will build another potentially life-saving detector—a radon detector. Radon gas is radioactive and can pose a hazard to your health if you live in an area where it leaks from the ground. In this electronics science project, you will learn how to collect radon with an ordinary dusting cloth mounted on the intake of a fan, and then measure its… Read more

Can Humans Recognize AI-Generated Text?

Science Fair Project Idea

Scientific Method

AI (artificial intelligence)-generated text is a hot topic for many reasons. Computers can now generate convincing paragraphs or even pages of text that look like they were written by a human. How do you know if a news article you are reading was written by a human or an AI? How does a teacher know if a student's essay was written by an AI? How do you know this text was not written by an AI? In this science project, you will conduct an experiment to see if volunteers can correctly identify… Read more

Can You Create an Unbeatable Tic-Tac-Toe AI Player?

Science Fair Project Idea

Engineering Design Process

Do you think you can win tic-tac-toe against an AI player? In this project, you will explore how the Minimax algorithm makes decisions in two-player games such as tic-tac-toe. This project requires little to no coding skill; instead, you will need an open mind and curiosity. Why not give it a try yourself? Read more

Candy Core Samples

STEM Activity

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Act like a geologist in this fun activity as you drill "core samples" from candy bars using a straw. Can you identify the type of candy bar just from a sample? Try this activity to find out! Read more

Craters and Meteorites

Science Fair Project Idea

Scientific Method

Have you ever heard someone say that the moon is made of cheese? Even though the craters on the surface of the moon resemble holes in Swiss cheese, we know that this common myth is not true. Find out how craters are formed and why they are different sizes by doing this simple science project. Read more

Design Your Own Virtual Reality Headset

Science Fair Project Idea

Engineering Design Process

Virtual reality (VR) headsets are becoming increasingly popular with consumers for things like viewing 3D pictures and videos, or for playing video games. However, dedicated gaming headsets like the Oculus Rift® and PlayStation® VR can cost hundreds of dollars. Some headsets, like Google Cardboard™, which is literally made out of folded corrugated cardboard (Figure 1), are much cheaper because they can use any smartphone as the screen. Figure 1. A… Read more

DIY Mini Drone: Arduino™ Altitude Control

STEM Activity

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How do drones automatically hover at a constant distance from the ground? Find out in this fun drone project as you build an altitude control circuit for a popsicle stick drone using an ultrasonic distance sensor and an Arduino™. See this page for a complete list of our mini drone projects. You may wish to do the projects in order. Read more

Do Video Game Players Have Faster Reaction Times Than Non-Players?

Science Fair Project Idea

Scientific Method

When someone yells, "Think fast!" and throws you a ball, are you able to catch it? When the bell rings at the end of class, are you the first one out of your seat? Can you make it through a sudden hairpin turn in a video game without crashing? If so, then you likely have quick reaction times. In this science fair project, you'll look at reaction times (how fast people react to sensory events), and see if people who play video games have faster reaction times than those who do not. Read more

Do-Re-Mi with Straws

STEM Activity

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Have you ever wondered how a musical instrument produces the beautiful sounds that it does? To make a certain note, the instrument has to make a certain sound wave. Depending on the instrument, the sound wave that is made can be affected by changing the length of part of the instrument, such as the strings in a piano or on a guitar, or a trombone’s air column. In this science activity, you will make your own musical instruments using drinking straws and explore how changing the length of the… Read more

Effects of Exercise: Changes in Carbon Dioxide Output

Science Fair Project Idea

Scientific Method

You might know that your body needs oxygen to keep going, and that you breathe out carbon dioxide as waste. What happens when you exercise? You have probably noticed that you breathe faster, and your heart beats faster. What triggers your body to respond in this way? How does it "rev up" to keep your muscles going? In this project, you will get a peek into the fascinating science of exercise physiology and find out—with the help of a color changing reaction. Read more

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