Twelfth Grade Science Experiments (Page 179)

Do People Take Longer When Someone Is Waiting? Perception vs. Reality

Science Fair Project Idea

Scientific Method

Maybe this has happened to you: you're going shopping with one of your parents and the parking lot is really crowded. You're helping out, scouting for an empty space. You see someone heading toward their car, taking their keys out, and you point them out. At last, you're going to get a spot. You wait for the person to pull out so you can park. Does it take them longer because you're waiting? Do they move out faster? Or does it just seem that they do? For information on people's… Read more

Do Plants Promote Pesticide Breakdown?

Science Fair Project Idea

Scientific Method

When pesticides are applied to protect crops, run-off of potentially harmful pesticides is a major problem. Can water plants such as hardstem bulrush, common cattail, parrotfeather and smooth scouring rush promote pesticide breakdown? If so, diversion of irrigation run-off into plant-filled ponds could help reduce pesticide pollution. Mix malathion at 12.5% of the recommended application strength (to simulate dilution by rain or irrigation water). Use 5-gallon buckets for testing various… Read more

Do Preferences Bias Our Choices?

Science Fair Project Idea

Scientific Method

What is your favorite color and why? Do you think that simple tasks might be biased by your preferences? Find out in this science project if your color preferences will bias your fine motor skills when doing quick, repetitive tasks. Read more

Do Preferences Bias Our Choices?

STEM Activity

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Have you ever wondered if your preferences bias the choices you make? You make choices all the time, whether you are aware of them or not. Many different factors probably work together to affect the option you end up choosing. Which do you think are the most important? Everyone has personal preferences, and these may affect the choices we make. What about your favorite color? You may prefer one color over another for no good reason, other than the fact that you like it—or you may have… Read more

Do String Players Have Longer Left Fingers?

Science Fair Project Idea

Scientific Method

Physical activity is needed for maintaining normal bone strength and mass. Can physical stress on finger bones during development lead to an increase in finger length? Check out this project to see how violin players are an example of a "natural experiment" that you can use to answer this question. Read more

Do You Have the Willpower to Taste Something Sour?

STEM Activity

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Have you ever wondered if people of all ages love sour foods, or if age correlates with this preference? There are a lot of different kinds of sour candies and drinks you may have seen advertised before, some having only a mild sour flavor and others that are truly mouth-puckering! In this activity you will investigate if there is a difference between the sour preferences of kids and adults. If you developed a super-sour food, to whom would you try to sell it? Read more

Does Birth Order Affect Grade Point Average?

Science Fair Project Idea

Scientific Method

Is there a correlation between birth order and grade point average? Design a survey study to find out. How many completed surveys do you need for a representative sample of your school? If you limit your survey to one school, would you expect it to be representative of a larger population (such as your county or state?) How do you control for potential effects of parental age at birth? (In other words, younger siblings will have a higher probability of being born to older parents. If there… Read more

Does Body Size Matter?

Science Fair Project Idea

Scientific Method

Animals come in all shapes and sizes, even humans. You can look up different statistics about different kinds of animals using the Internet: average body size, brain size, life expectancy and generation time are some examples. Is there a correlation between body size and life span? Is there a correlation between body size and brain size? Is there a correlation between body size and generation time? Is there a correlation between body size and the size of your footprint? (Comparative Mammalian… Read more

Does Virtual Practice Make Perfect?

Science Fair Project Idea

Scientific Method

You've probably heard the phrase, "practice makes perfect" more times than you care to remember, but is it actually true when you use a music game as your practice for real-life singing, strumming, or drumming? You can design a science fair project to discover the answer! First, you'll need to think about how to measure how well someone is playing or singing a song in real life. Using the test you design, measure several musicians' ability to play or sing a few different songs. Then have your… Read more

Does Wet Hair Float or Cling?

STEM Activity

Have you ever noticed how hair moves freely when it is under the water, but clings together as soon as it emerges out of the water? Not only human hair does this; when wet dogs shake themselves after a swim, their hair clings together in strands. Try this activity to see why wet hair is far less fluffy than dry hair! Read more

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