Twelfth Grade Science Experiments (Page 116)

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Have you ever looked at a package of dry yeast and found it hard to believe that it contains organisms that are alive? Add the right ingredients and presto, the mixture becomes a bubbly, oozing, mess of life! But what are the conditions that are needed for this to happen? What does that yeast need to become active and thrive? Try this science activity to find out for yourself! Read more

Skipping Science: An Experiment in Jump Rope Lengths

Science Fair Project Idea

Scientific Method

Did you know that the world record for the greatest number of jumps in a minute is more than 340? That's more than five jumps a second! How close do you think you can get to that number? If you are going to try to break the record, it might be important to figure out how jump rope length affects your success. Try your hand at this skipping science fair project and jump-start your chances for a jump rope record. If you have a smartphone available, you can use its accelerometer and a sensor app… Read more

Sleep Tracking: The Brain and Circadian Rhythm's Role in Sleep

Science Fair Project Idea

Scientific Method

Everybody sleeps, but not everybody has good quality sleep. Sleep is essential for the brain, but how do our daily choices impact sleep? In this science project, you will experiment and explore factors that influence your nighttime sleep schedule. Read more

Slinking Slinkies

Science Fair Project Idea

Scientific Method

Want to do a project with a toy your parents, or even grandparents, might have played with? Slinkies are fun toys that also make great physics and engineering projects. In this science project you will investigate how changing the angle of an inclined plane affects how the Slinky walks down it. What angle will enable the Slinky to go for the best walk? Read more

Slip Sliding Away: Experimenting with Friction

Science Fair Project Idea

Scientific Method

As you headed up the mountain to enjoy your last ski trip, you may have noticed a sign reading: Hazard! Icy Roads Ahead—Put On Your Chains. Putting chains on car tires increases the resistance between the tires and the road allowing the car to "grip" the road. This resistance to sliding is called friction. In this experiment, you will be investigating how to increase and decrease the friction between two surfaces. Read more

Slippery Science: Explore Friction by Launching Stuff

STEM Activity

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Have you ever tried to get a running start and slide across a smooth, wooden floor while wearing socks? What happens if you try the same thing on a carpeted floor, or while wearing shoes? The amount of friction between your feet and the floor surface determines how well you can slide. Some combinations of surfaces, like socks on a wooden floor, produce very little friction. Other combinations, like rubber soles on a wooden floor, produce much more friction. In this project you'll do a much… Read more

Small, Tiny, Invisible: How Big Is a Virus?

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Have you ever seen a real virus? Probably not—they are so tiny that it is impossible to see them with your naked eyes. But how big or small are viruses really? The coronavirus Sars-Cov-2, which causes COVID-19, is about 120 nanometers in size. One nanometer is equal to one billionth of a meter! How many of these tiny coronaviruses do you think can you line up inside a pencil dot? In this activity, you will find out by creating a scale model that allows you to compare the size of many… Read more

Smelly Science: A Sniff Test

Science Fair Project Idea

Scientific Method

Take a deep breath: freshly baked cookies, smoke from a wood fire, or a rose—your nose is an amazing smell detector! Your sense of smell can not only identify a huge variety of odors, but it is also incredibly sensitive. Think about how easily you can detect if someone in your neighborhood has a barbecue just by smelling the hints of smoke from the grill far away. How strong or weak you perceive an odor depends on its concentration. What do you think is the lowest concentration of a… Read more

Sniffing Out the Science of Smell

Blog Post

These science projects help students explore smell-based questions related to human biology and food science. Sometimes, great science is right there at the tip of your nose. Like taste, how intensely or how accurately we smell things around us varies from person to person. You may even find that your sense of smell is stronger at certain times than others. Are you the first in your house to pick up the smell of a skunk in the area? Do you walk into… Read more

Social Media: When and Where Do People Post?

Science Fair Project Idea

Scientific Method

Social media is all the buzz on the internet. What can we do with all the information generated by millions of people posting, tweeting, taking pictures, and chatting? How do companies convert it into profit? While you do not have the tools to analyze data from millions of social media posts by yourself, you will be able to analyze a scaled-down version. Follow the instructions in this project to try your hand at extracting data from a couple of social media sites and use it to create… Read more

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