Monthly Archives: April 2014

In a liquid, the highest density liquid is at the bottom of the container.
Traditional density columns layer immiscible liquids (ones that won’t mix), such as oil and water. One advantage of this type of density column is that you can shake the container and the liquids will separate. One disadvantage to using immiscible liquids is that you quickly run out of either readily […]

Easy Rainbow Density Science Project

Lithium-Iron Nitrogen Magnet
Rare-earth magnets are a type of permanent magnet with high magnetic strength. A magnet’s strength is due to two factors: field strength and anisotropy. Field strength is the magnitude and direction of the magnet’s magnetic field. Anisotropy is the ability of the magnet to maintain its direction of the magnetic field. Rare-earth […]

Making Rare-Earth Magnets Without Rare-Earth Elements

Rice Flex Battery
Chemists at Rice University have developed a material that can function as an ultra-thin and flexible rechargeable battery and contains no lithium. Lithium is a common element used in many rechargeable batteries today. Lithium ion batteries can hold a lot of charge in a small package and can be reused and recharged […]

Lithium Free Flexible Batteries

Everyone knows that stars are far away. They are far enough away the distances between them is measured in light years. A light year is the distance light travels in one year or 9.5 x 1012 kilometers or 5.9 x 1012 miles. The ten closest stars are all within 10 light years of our Sun. […]

10 Closest Stars

NASA’s Curiosity rover managed to capture an image of two of the largest asteroids orbiting between Mars and Jupiter: Ceres and Vesta. The atmosphere on Mars contains water ice clouds and haze during this part of the Martian year. NASA’s Jet Propulsion Laboratory conducted an instrument test to check the opacity […]

Asteroid View From Mars

Sirius A and B
When you look up at the stars, one of the first things you may notice is some are brighter than others. Early Greek astronomers believed all the stars were the same distance from us, so brighter stars must be bigger stars. They catalogued the stars by their “magnitude”. The magnitude […]

10 Brightest Stars

Hydrochloric Acid
This is a list of the strong acids and strong bases. There aren’t very many, so it’s a good idea to memorize them, if you can. Table of Strong Acids The strong acids ionize completely in water to yield or or more protons per acid molecule. Name Formula Ionization hydrogen iodide […]

Table of Strong Acids and Strong Bases