Eleventh Grade Science Experiments (Page 23)

How Do We Breathe?

STEM Activity

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177 reviews

We breathe a lot—roughly 12 to 16 times a minute for adults and even more for children! Have you ever wondered how the process of breathing works so smoothly? Our lungs allow us to inhale the oxygen our body needs, but they do much, much more. They also allow us to get rid of carbon dioxide, the waste product created in the body, and they play a vital role in singing, shouting and even giggling. In this activity you will make a model of a lung and use it to discover how air flows in… Read more

How Does Speed Affect Orbiting Altitude of Satellites?

Science Fair Project Idea

Scientific Method

The movement of satellites is intriguing, but how do they orbit the way they do? Aerospace engineers run calculations and set up computer models to help them predict how satellites move in space, but in this astronomy science project, you will create a physical model with marbles, clay, and a cookie sheet to help you study how satellites move in space and learn from your observations. Read more

How Eco-Friendly is Your Sunscreen?

Science Fair Project Idea

Scientific Method

Imagine a wonderful summer day at the beach. You play in the sand, swim in the ocean—and, of course, put a lot of sunscreen on. The sunscreen protects your skin from harmful ultraviolet (UV) radiation. Special ingredients absorb or reflect the UV rays so they do not harm your skin. Different types of sunscreen have different types of ingredients, and some of them can be harmful to the environment—especially if they get into the ocean. In this science project you will put your… Read more

Is It Ripe Yet? Build a Circuit to Detect Ripe Produce

Science Fair Project Idea

Scientific Method

When you go to the supermarket, how do you pick out ripe fruits and vegetables? You might look at their size or color, or feel them for firmness. That might be easy to do when you pick out a half dozen apples, but imagine if you had to examine thousands of apples growing in a field, or strawberries coming down a conveyor belt getting ready for packaging. Suddenly, it is a lot harder to do yourself! What if a machine could pick and sort the produce for you? In this project, you will address part… Read more

Launching Homemade Baking Soda Rockets

STEM Activity

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Have you ever enjoyed watching something lift off into the air, like fireworks at a show or a spacecraft launching? It can be an amazing experience. It is thrilling to see something lift off against Earth's gravity. To launch a spacecraft, its rockets give it a strong push that is due to a chemical reaction. This means that every time you see a spacecraft launch, you are watching chemistry at work. In this activity you will get to blast an object into the air using two simple… Read more

Liver Stinks!

Science Fair Project Idea

Scientific Method

Sometimes science can be really messy or use pretty disgusting ingredients. That is what it takes to understand how the world works, even if the experiment isn't pretty. Do you like chemical reactions that stink and ooze foamy bubbles? Do you think it sounds fun to make a super gross liver smoothie? Then this is the experiment for you! Read more

Protect Your 'Eggstronaut': Build an Egg-Drop Lander

STEM Activity

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The egg-drop project is a classic and time-honored tradition in many science classes. The goal is usually to build a device that can protect an egg when dropped from a high location. This activity puts a twist on the classic project, motivated by real-world advances in space exploration. Can you build a reusable egg-drop lander that can survive repeated falls from the same height? Try this activity and find out Read more

Rusting Out: How Acids Affect the Rate of Corrosion

Science Fair Project Idea

Scientific Method

Have you ever left your bike outside in the rain? If so, you might have discovered unpleasant surprises afterwards—reddish-brown patches, known as rust, and your wheels, brakes, and gears might have stopped working so smoothly. In this chemistry science fair project, you'll learn why rust, a type of corrosion, is a serious problem. You'll also discover that not all rains are the same! Find out which ones can speed up the rusting process. Read more

Stay warm with thermal insulation

STEM Activity

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What do you do when it gets very cold in winter? You probably turn your heater on, put on an extra layer of clothes, or cuddle under a warm blanket. But have you ever thought about why a jacket helps you stay warm? What is the purpose of our clothes, and why are they made from fabrics and not foils? Find out the answers in this activity; your results may even tell you the best way to stay warm in the cold! Read more

Test Your Foods for Starch

STEM Activity

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Have you ever heard about starchy and non-starchy foods? What is the difference? Starchy foods contain the carbohydrate starch, which is converted to sugar (glucose) inside our body for energy production. How do we know which foods contain starch and which do not? There is a simple chemical test that you can do to detect starch, which involves an iodine solution. The iodine solution turns any food that contains starch dark blue. Try this activity and watch it in action yourself! Read more

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