Second Grade Science Experiments (Page 196)

Measuring Surface Tension with a Penny: Weekly Science Spotlight

Blog Post

What makes drops of water on a penny appear to pool together on the top of the penny as a large drop rather than run over the sides? Attraction of the water molecules holds the surface of the water together until the amount of water is too great and spills over the edge. This attraction results in surface tension—something we can see visually in the way the droplet may seem to hold together as a jiggly whole rather than flowing freely over the edges of a surface. You can see surface… Read more

Measuring the Speed of Moving Objects with Stroboscopic Photography

Science Fair Project Idea

Scientific Method

A strobe light can illuminate an entire room in just tens of microseconds. Inexpensive strobe lights can flash up to 10 or 20 times per second. This project shows you how to use stroboscopic photography to analyze motion. Read more

Measuring Up

Science Fair Project Idea

Scientific Method

Measurements are very important for scientists. It is especially important that the measurements be accurate. Think about how important accuracy is when you want to know if you are taller than a friend of yours, every inch counts! In this experiment, you will investigate how different objects can be measured with accuracy. Are small or large objects more difficult to measure? Who in your family is the best at measuring? Maybe it will be you! Read more

Measuring Vibrational Frequency with Light

Science Fair Project Idea

Scientific Method

Strike a key on the piano, and you hear the string vibrating. Just about any object vibrates when it's knocked, but how much and how fast? What properties of the material affect the way it vibrates? This project helps you find out. You'll build a simple light-sensing circuit for measuring the frequency of vibrating springs. Read more

Mechanical Science Scissor Lift

Blog Post

Kids can experiment with physics and mechanical engineering at home or in the classroom by making a fun cardboard scissor lift. Explore Mechanical Science Simple devices and machines can be used to help solve everyday problems. A scissor lift is a device that can fold up compactly but can extend to a great length. This kind of device uses a system of mechanical linkages and can stretch out or contract with an accordion-like motion. In the Build a… Read more

Memory Surprises

STEM Activity

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Have you ever wondered why some things are easy to recall, while others need hours of study? For example, you might be able to recollect what happened at your birthday party without any practice, but you need hours of study before you can recite a few lines for a theater play. Our mind stores and remembers information in fascinating ways. Remember to do this activity and you will be surprised at what your memory can do for you! Read more

Meteor Science: Weekly Science Project Idea and Home Science Activity Spotlight

Blog Post

In this week's spotlight: a pair of astronomy science projects perfectly timed for this year's peak Perseids meteor shower activity. Most meteors that pass through the Earth's atmosphere burn up before they hit the ground. But what happens when a meteorite hits? In this pair of hands-on science activities, students and families experiment to find out how the size of a meteorite is related to the size of the resulting crater. Craters and Meteorites (full Science Buddies Project… Read more

Minerals

Science Fair Project Idea

Scientific Method

Minerals are sometimes precious, like diamonds. But most minerals are very common, like sodium, which is found in salt. How are minerals found and identified? How are our mineral resources distributed? Visit the USGS Mineral Resource Program to find mineral resources in your state. How are satellite images used to identify potential mineral sources? You can also find out how minerals are identified using spectroscopy. How are potentially harmful minerals, like mercury, dealt with? Visit the… Read more

Minimizing Bacteria in the Thawing and Cooking of Meat

Science Fair Project Idea

Scientific Method

How does your family thaw and cook meat? Have you ever wondered if it is the safest way? In this practical science project, you can find out and shed light on safe practices in the kitchen by investigating how many viable bacteria are present in samples of meat that have been thawed or cooked using different methods. Read more

Mission to Mars: Summer of STEM (Week 9)

Blog Post

Join Science Buddies this summer for virtual summer camp! Each week, we'll have a fun STEM theme for kids of all ages, suggestions for simple hands-on activities, book picks, and more. With our Summer of STEM, we'll keep you and your kids inspired all summer with creative and innovative science and engineering activities — for free. This week: go on a Mission to Mars with space-themed science! A Mission to Mars with Space Science On NASA's… Read more

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