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Bat Detector: Listen to the Secret Sounds of Bats
Science Fair Project Idea
Scientific Method
Do you have bats in your neighborhood? Have you heard them "whoosh" by you, but not been able to see them? In this science fair project, you will be able to detect flying bats by listening in on the ultrasonic signals they produce to locate objects in their environment. The bat detector is a useful and fun tool for studying the biology of this nocturnal flying mammal. Read more
Bath Bombs Chemistry: Family Science Activity Spotlight
Blog Post
In this week's spotlight: a family science experiment that promises fizzy fun in the tub (or in a big bucket of hot water). Bath bombs are easy to make at home. You can mix up your own using your choice of additives with the core ingredients. But what makes a bath bomb "fizz" when it hits the water? In this science activity, students experiment with the recipe for making a bath bomb and investigate the role of corn starch and citric acid in the process. What is the… Read more
Be Seen In the Dark
STEM Activity
Being outside in the evening can be relaxing as well as exciting and fun, but it could also be dangerous. Did you know that in 2014, on average, 13 pedestrians died on American roads every day and three out of every four pedestrian fatalities happened in poor light conditions, such as dusk, dawn, or at night? When considering these worrisome numbers, do you think the types of clothes worn could make a difference in how visible pedestrians are to drivers? If so, what should you wear: bright… Read more
Beats
Science Fair Project Idea
Scientific Method
Beats are a pattern of oscillating sound intensity (i.e., the volume of the pattern grows and fades with a regular cycle). They occur when two tones of almost equal frequency interfere. People can perceive beat frequencies below about 7 Hz. Figure out how to create sound files to play pure tones on your computer. Create files with a pure tone of one frequency in the left channel, and a pure tone of a different frequency in the right channel. Systematically explore different frequency… Read more
Bend or Break? Candy Science
Blog Post
What happens when you bend your favorite candy in half? Does it break? Does it bend? Does it snap back into shape? In this week's materials science-themed family science activity, students put candy to a "bend it" test to explore how some materials are more flexible than others. While it may be obvious that some candy bars will break (or snap in half) when bent while other more "gummy" candies bend, changing the temperature of the candies gives this experiment an extra… Read more
Big Ears Science
Blog Post
Experiment with different styles of ears to see how the size and shape of ears changes what you may be able to hear in this family STEM activity. Sometimes exploring science with kids means being silly and putting on enormous animal ears as you ask and investigate serious science, technology, engineering, and math questions like can you hear better with bigger ears? When you think about ears and how human ears are different from animal ears, what animal ears immediately come to… Read more
Binocular Vision Eye Science
Blog Post
In this family STEM activity, put your eyes to the test... alone and as a working unit! How do your eyes work together to help you see? Eye Science Your eyes help you see what is in front of you, but have you ever thought about how your eyes work together (with your brain) to make sense of what you see? We have two eyes, but together our brain processes a single image. How does this work? When you look through a pair of binoculars, you place each eye in front of one of the eye pieces.… Read more
Biodiversity Survey
Science Fair Project Idea
Scientific Method
Survey your area to find out which species of plants and animals live there. You might be surprised to find out that something you grew up thinking was very common, is actually quite unique! For example, if you live in the great plains, then you may think that prairie dogs are a nuisance or a pest. Actually, some species of prairie dogs are only found here, and have a very important role for short and tall grass prairie ecosystems. The prairie dogs are an important part of the food-chain, and… Read more
Bird Science: Weekly Science Project Idea and Home Science Activity Spotlight
Blog Post
In this week's spotlight: a pair of zoology science projects that encourage families and students to use their observation skills to learn more about birds. What can you deduce about a bird's lifestyle or habitat by looking at its feet? More than you might think! Both the independent science project and the family science version guide students in an engaging bird feet scavenger hunt. The closer you look, the better, so pack a picnic lunch and head to a nearby park or… Read more
Bit Depth, Colors and Digital Photos
Science Fair Project Idea
Scientific Method
How many bits of information are in a digital photo? It depends on how many possible colors there are. Learn how to choose the right number of colors and bits to post your photo on the web or send it to your best friend. Read more
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