Twelfth Grade Science Experiments (Page 149)

Science Fair Project Idea

Scientific Method

What would you do if you saw one of your friends lying on the floor, not breathing, possibly having a heart attack? Call 911? Start CPR (cardiopulmonary resuscitation)? Those would both be important things to do! But do you know CPR? Do your friends and family know CPR? Chances are, most of them don't. Even if they do know CPR, they might be hesitant to use their mouths to perform it. You can change that though. In this science project, you'll create a simple, interactive game that can teach… Read more

Scrumptious Science: Great Globs of Gluten!

STEM Activity

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Do you have a favorite Thanksgiving dinner dish? Maybe it’s an aunt’s special cranberry sauce, or mashed potatoes combined with perfectly-seasoned gravy. Or perhaps you enjoy sinking your teeth into a succulent roasted turkey the most. Dinner rolls, biscuits, corn breads, muffins, pastries and pies may also be baked for this special meal; the foods in this group typically all contain a substance called gluten. In this science activity, you’ll explore why some foods, all made… Read more

Seasonal Disease Outbreaks

Science Fair Project Idea

Scientific Method

"Flu season" is something we deal with every winter. Cyclical or seasonal outbreaks of an infectious disease can occur for a variety of reasons, such as seasonal changes in host behavior (for example, more people staying indoors), the seasonal abundance of disease carriers (for example, mosquitos), and many others. Another factor that can play a role in cyclical outbreaks occurs when the natural immunity to a disease has a short duration. This enables each individual in the population to… Read more

Seawater Science: Model Ocean Currents in Your Kitchen

STEM Activity

Have you ever wondered what causes ocean currents? Ocean currents have profound effects on the climates of the continents, especially those regions bordering on the ocean. For example, it’s thought that the Gulf Stream (a warm current around the North Atlantic Ocean) makes northwest Europe much warmer than it would otherwise likely be. In this science activity, you will model the behavior of these “rivers” of hot and cold water within the ocean to find out how temperature… Read more

Seed Dispersal Science: Carried by the Wind

Blog Post

Explore the ways in which the shape and size of a seed influences how far it may travel when carried or blown by wind. What characteristics help seeds travel long distances by wind? Photo: Ragesoss, Wikimedia Commons If you hold a dandelion to your lips and blow, the seeds scatter through the air. This scattering, also called dispersal, helps distribute seeds which helps plants reproduce. Wind can carry seeds away from their plants, but how far a seed… Read more

Seeing Beyond the Visible: Photography with Near Infrared Illumination

Science Fair Project Idea

Scientific Method

Have you ever wondered what it would be like to have an extra sense? What if you could hear above the normal range (ultrasound) like dogs or bats? What if you could see ultraviolet light, like bees or juvenile trout? What if you could see infrared light, like a rattlesnake or boa constrictor? This project shows you how you can use a phone or camera, tripod, and a special filter to take pictures using near infrared illumination. It's a whole new way of looking at the world. Read more

Seeing Science: Exploring Perception with the Stroop Effect

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Have you ever tried to pat your head with one hand while you rub your stomach with the other? This science activity is kind of like doing that, but it can actually give you some insight into how your mind works. The challenge of this activity is to name colors. It sounds simple enough, right? If you think it does, you should see what happens when words of colors get in the way! This is a fun activity to try out with family and/or friends while spending time together over the holidays. Read more

Separate Liquids with Salt!

STEM Activity

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You probably know that some liquids, such as oil and water, do not mix together. If you pour them into the same container, they will form two separate liquid layers on top of each other. Other liquids, for example rubbing alcohol and water, can be mixed with each other. But did you know that once both of these liquids have mixed, you can separate them again into two different layers? How can you do that? The answer might surprise you: with salt! In this activity, you will find out how this… Read more

Separating Butter with a Salad Spinner Centrifuge

Science Fair Project Idea

Scientific Method

Imagine that you could make an important piece of laboratory equipment in your kitchen. With this science project idea, you can! You will create your own centrifuge out of a salad spinner and some putty. In science labs, centrifuges are used to separate different liquids and/or solids from each other. You can load your homemade centrifuge with samples and see how they separate. What do you think happens to melted butter in a centrifuge? Read more

Shape Science: Play-Doh Math

STEM Activity

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Have you ever had fun making different figures or colorful creations using some Play-Doh? You can squish and stretch a single piece of Play-Doh to make all sorts of shapes. How does changing the shape of a piece of Play-Doh affect its volume? In this science activity, you will find out by investigating how a piece of dough’s shape affects its dimensions (length, width and height), and how these changes are related to the dough’s volume. Read more

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