Twelfth Grade Science Experiments (Page 98)

Multitasking: Brain Drain or Boost in Efficiency?

Science Fair Project Idea

Scientific Method

Think it's a good idea to plug into iTunes, surf the Web, or watch TV while doing homework or trying to read? Lots of people do it and claim that jumping from one activity to another keeps their attention level up and even gives their brain some time to "relax" between the more challenging tasks. Just how efficient is multitasking? In this project, you'll find out after testing the ability of volunteers to successfully do two or more things at once. Read more

Oil Spills

Science Fair Project Idea

Scientific Method

No one can deny the devastating consequences of an oil spill on the local wildlife. Oil affects all levels of the ecosystem, from plants to fish and birds. What happens to water plants if you add motor oil to their pot? What is the effect of motor oil on the health of a goldfish, or water insects? What happens to the barbs of a bird feather if they are dipped in oil? Can you test different types of environmentally-friendly detergents for cleaning the bird feathers? Can you test different… Read more

One Bad Apple Spoils the Whole Bunch: An Experiment on the Plant Hormone Ethylene

Science Fair Project Idea

Scientific Method

We have all heard the old saying, "One bad apple spoils the whole bunch." Due to the production of the plant hormone ethylene during the ripening process, this saying proves true! This experiment will investigate the role of ethylene in the process of fruit ripening. Read more

Ozone Depletion

Science Fair Project Idea

Scientific Method

The ozone layer is important for blocking most of the harmful radiation that comes from the sun. You can find maps of the ozone layer and compare different regions of the globe for ozone coverage. Where are the problem areas? Is there a difference in ozone coverage between different hemispheres? Between populated and un-populated areas? In atmospheric regions over land masses or over bodies of water? Some scientists think that aerosols in the air are breaking down the ozone layer. You can do… Read more

Paper Bridge for Pennies

Science Fair Project Idea

Scientific Method

Using just a single sheet of paper (8.5 x 11 inches) and up to five paper clips, can you build a bridge that will span 20 cm and support the weight of 100 pennies? The area beneath the span must be free (so that boats can pass beneath it). To test your bridge, place two books 20 cm apart, and set the bridge on the books, spanning the gap. Do not fasten the bridge to the book (nor to any other support). Does your bridge hold as much weight as you expected it would? If your bridge fails… Read more

Paper Circuits Science Projects

Blog Post

Use these free STEM projects and activities to learn about circuits and make interactive paper circuits with K-12 students. Teach About Circuits! With "paper circuits," students can learn about circuits and design and build their first circuits on a piece of paper. Paper circuits are great for introducing students to circuits because the materials are simple. With copper tape, an LED, and a coin cell battery, students can assemble a circuit, learn… Read more

Paw Preference in Pets

Science Fair Project Idea

Scientific Method

The great majority of people have a distinct hand preference. How about animals like dogs or cats? Do they show a paw preference? If you like animals, this science fair project might be for you. Read more

Phone Book Friction

STEM Activity

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A popular science demonstration shows that when you overlap the pages of two phone books, they are nearly impossible to pull apart. Since most people do not have two phone books sitting around, we will show you how you can do the same experiment with sticky notes. Sticky notes are much smaller than phone books, so they should be easy to pull apart, right? Try this activity to find out! Read more

Picture This: Building a Cell Phone Microscope

Science Fair Project Idea

Scientific Method

Imagine you are on a trip and see something interesting that you want to share with your friends. What do you do? You take a picture with your cell phone and e-mail it to them, of course. But did you realize that the same technology can be used to save lives? Using their cell phones modified as inexpensive microscopes, medical personnel can look at blood smears to help diagnose diseases like malaria and cholera. In this photography science project you will build a simple and inexpensive cell… Read more

Polar Puzzle: Will Ice Melting at the North or South Poles Cause Sea Levels to Rise?

Science Fair Project Idea

Scientific Method

If you leave an ice cube out on the kitchen counter and come back to check on it in awhile, what do you find? A puddle! The same thing happens to ice in nature—if the temperature gets warm enough, it melts. In this ocean science project, you will find out what happens to sea levels if the ice at the North Pole melts, or if the ice at the South Pole melts. It is an important question for the millions of people who enjoy living along the coasts of the world. Read more

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