Does hot water freeze faster than cold water? Turns out, the answer to this question is a lot trickier than it seems!

South Africa is facing acute, primarily financial, problems in delivering high-quality healthcare. Public-sector hospitals, subsidized by the state, serve 80 percent of the population, while the private hospitals serve only 20 percent....

What Kind of Toothbrush Should You Use?

Howcast - Do you cringe every time a pal buys a bottle of water, knowing how bad they are for the environment? Guilt them into switching to tap with these tactics.

Howcast - Learn if you can fill a saltwater fish tank with tap water from aquarium expert Joseph Caparatta in this Howcast video.

Howcast - The density of salt water depends on how much salt is dissolved in it. Calculate the density of a particular sample with the method described here.

They don't call them salad days for nothing; you probably can't afford to eat anything else. But there are ways to trim your food budget—and they're even good for you.

Learn about the longest rivers in the United States, and their roles in shaping the nation's landscape, culture, and history.

Fizzy knocks out the power to the Lunch Lab with his newest invention, making him go “old school” to squeeze some fresh orange juice. Then grab your water bottle and rock with the band as they sing about the importance of staying hydrated!

The clarity of ice cubes is determined by the temperature of the water used to make them. Warmer water contains more impurities, which are released when the water is cooled and frozen. Ice cubes made from distilled or boiled water are...

A rainbow is not actually shaped like a semicircle or an arc; that is simply the shape that we see. In fact, a rainbow is a circle, but we can’t see the full shape because the horizon cuts off the lower half. However, if you were...

What is the expense, and environmental cost, of bottling water when tap water is freely available? Earth Science - Earth's Resources - Learning Points. Bottled water is up to 10,000 times more expensive than tap water. Bottled water has...

Learn how to find out the difference between tap water and spring water.
<

br/>

Material processes - Separating mixtures - Separation
b

y evaporation />

Learning Points
Evaporation c
a

n be used to...

This video discusses the debate between bottled water and tap water, highlighting that bottled water is often just filtered tap water and may contribute to environmental issues. It also touches on the potential health impacts of...

The clarity of ice cubes is determined by the temperature of the water used to make them. Warmer water contains more impurities, which are released when the water is cooled and frozen. Ice cubes made from distilled or boiled water are...

The video titled “Water Pods” is an infomercial that illustrates the need for an alternative to plastic bottles and discusses a possible solution.

This video is a walk-through of the "Dealing with Diabetes: The Road to Developing an Artificial Pancreas" project at Science