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What Is Baking Powder, and How Does it Work?
recipes.howstuffworks.com/tools-and-techniques/baking-powder.htm
Baking powder is an essential ingredient when preparing baked goods.
Spot the Deal
play.howstuffworks.com/quiz/spot-the-deal-quiz
Getting the most for your money at the supermarket requires some number-crunching. Bring a calculator when you're shopping and take the time to do a little math to ensure you're getting the best price for your money. Can you spot the best deal? Let's get started.
Do Epsom salt soaks really relieve pain?
Will an Epsom salt bath ease your aches, or is that just an old wives' tale? Find out if Epsom salt soaks relieve pain at HowStuffWorks.
Can You Ace This Mental Multiplication Quiz?
play.howstuffworks.com/quiz/can-you-ace-this-mental-multiplication-quiz
If you love math, you'll love trying to ace our mental multiplication quiz! This quiz is comprised of not just easy whole numbers, but decimals, percentages, negative numbers and even square roots. Take this quiz now to see how well you do!
How Many Regular Helium Balloons Would It Take to Lift Someone?
science.howstuffworks.com/science-vs-myth/everyday-myths/question185.htm
There's actually an equation to figure it out!
The Mental Math Quiz
play.howstuffworks.com/quiz/the-mental-math-quiz
If you love math and calculating numbers in your head, you'll love taking this mental math quiz! With 35 math questions that consist of square roots, division, multiplication, word problems and more, we're putting your math skills to the test!
What Is Number Theory?
science.howstuffworks.com/math-concepts/number-theory.htm
For many of us, a number is just a number, a bit of information that tells you, say, what time it is. But mathematicians look at that same number and divine relationships that underlie nature itself. Ready to enter the trippy world of number theory?
Strong Bases: Properties, Applications and Examples
science.howstuffworks.com/strong-bases.htm
In chemistry, the classification of substances into acids and bases is fundamental.
Can You Ace This SAT Practice Test?
play.howstuffworks.com/quiz/can-you-ace-this-sat-practice-test
How's your algebra and geometry? Can you find the volume of a cone and is four a prime number? What does frankly mean? Put your high school knowledge to the test and see if you can ace this SAT practice test.
How Ballpoint Pens Work
home.howstuffworks.com/pen.htm
Before the handy ballpoint, getting a few sentences onto paper was a pretty involved task. Find out how the ballpoint pen stores and manages its own ink supply to make writing a snap.