Twelfth Grade Science Experiments (Page 101)

Seeing Pedigree Science: Making a Family Tree of Traits

STEM Activity

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19 reviews

Has anyone ever told you that you look just like one of your parents or grandparents? Some characteristics, like the shape of your hairline or whether your earlobes are attached or detached, are inherited. In this activity you’ll get to see how writing some characteristics onto a family tree can help you determine just how you inherited them. You will likely discover some characteristics that you got from your father, and for this Father’s Day you can thank your… Read more

Sensory Science: Testing Taste Thresholds

STEM Activity

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During the holidays, we often find ourselves surrounded by a wide variety of taste sensations. Have you ever wondered how well we sense different tastes? People are generally able to discern five basic tastes: sweet, umami (also known as savory), salty, sour and bitter. Is it easier to detect some of these flavors at low concentrations compared to others? In this science activity, you (and possibly your friends and/or family) will find out by exploring your taste thresholds for sweetness,… Read more

Separating Glitter with a Homemade Centrifuge

Science Fair Project Idea

Scientific Method

It is fun to shake up a snow globe and watch the "snow" slowly fall. You can imagine that if the snow fell down very quickly it would be disappointing. But there are times when scientists in a laboratory want this to happen. Scientists use samples that have liquid mixed with small, solid pieces (like the inside of a snow globe), and they need all of the solid pieces in a clump, separated from the liquid. Instead of waiting for the pieces to slowly fall out of the liquid, scientists speed up… Read more

Separating Mixtures: Can You Design a Device to Do It?

Science Fair Project Idea

Scientific Method

Have you ever looked in the kitchen cupboard and found a container of tiny white grains, but you were not sure if they were sugar or salt? They look very similar. How could you tell them apart? Well, you know that sugar and salt taste very different. Taste is actually called a property, and properties are used to describe and identify different materials. Properties can also be used to physically separate things. In this science project, you will use different properties to create a way to… Read more

Separation By Distillation

STEM Activity

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Do you like cooking? If you have helped in the kitchen at home, you have probably heated up lots of liquids, like water, milk, and soup. Did you notice that once the solution boils, a lot of steam develops; and have you ever wondered what the steam is made of? What happens to all the substances, such as sugar or salt, that are dissolved in the solution you are boiling? Do they boil off, too, or do they stay behind in the solution? In this activity, you will build a distillation device that… Read more

Singing Wine Glasses

STEM Activity

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Is Thanksgiving one of your favorite holidays of the year? All your friends and family are getting together to celebrate. The table is full of delicious food—a big feast—and there might even be some fancy China and glassware on the table to make the celebration even more special. Who can resist the temptation to make the wine glasses sing? You have probably done this many times before, but have you ever wondered, why the wine glass makes this sound? Do this activity, and you will… 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

Smarter Farming with Aerial Photo Analysis

Science Fair Project Idea

Scientific Method

Wondering what sustainable, high-producing agriculture might look like? This science project explores how analyzing bird's-eye-view pictures of a field can make farmers aware of variations in their fields. Farmers can use this information to optimize their farming practices, or even feed this information to high-tech agricultural equipment so the machines can automatically adjust their actions (like fertilizing or watering) to the needs of a piece of land. 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

Soccer: Geometry of Goal-Scoring

Science Fair Project Idea

Scientific Method

Block off one-third of a soccer net with a cone, 5-gallon bucket or some other suitable object. Shoot into the smaller side from a set distance, but systematically varying the angle to the goal line. Take enough shots at each angle to get a reliable sample. How does success vary with angle? For a basic project: How do you think your success rate will vary with angle? Draw a conclusion from your experimental results. A bar graph showing success rate at different angles can help to… Read more

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