Categorized | Experiments, Research, Science

Clear as ice

What’s happening?

Try leaving a glass of tap water on the table for a day without touching it. You’ll notice the sides of the glass are speckled with bubbles. Where did this gas come from? It came right out of the water, in fact. As the water passed through the pipes on its way to your home, gases from the surrounding air were dissolved into it.

As the water warms, it is able to hold less gas. Boiling the water removes a lot of the dissolved gases in the water, just as a glass of water left out on a table will release bubbles.
Freezing the water does the same thing. Ice is formed as the water molecules line up with one another, which also pushes out dissolved gases and minerals. Because the water freezes from the top down, the dissolved gases are pushed slowly to the bottom until it collects into bubbles. Filtered water has less dissolved minerals in it, also making for clearer ice cubes. So should you be using non-filtered water for this activity, to make the difference more obvious?

Applications

When you think of snow, icebergs or glaciers, you rarely think of them as transparent. They are often shades of white or blue, and sometimes even pink or green. The reason has little to do with the ice itself, but what lies trapped in it.
As light passes through the solid ice and hits a bubble, it bends or ‘refracts’. Sometimes it will bend enough to bounce right back out again, reflecting most of the light and making the snow or iceberg look a bright white colour. If there is something in the ice capable of absorbing some of the light, like minerals or algae, it will bounce back a colour like green or pink.

Warning: This activity requires boiling water. Younger scientists should seek the help of an adult.

You will need

  • A small pot
  • Stove
  • Ice cube trays or small containers
  • 1 litre bottle of filtered water
  • A freezer
  • Paper
  • A pen

What to do

  1. Pour half of your filtered water into a pot and boil it for at least five minutes. Let it cool and repeat.
  2. Fill one of your containers or ice cube trays with the remaining, non-boiled water.
  3. Once the pot has finished boiling, fill the second container with the hot water. Take care not to scald your hands.
  4. Place both containers into the freezer, using your pen and paper to keep a note or make a label detailing which one contains the boiled water.
  5. Wait two hours (if the containers are large, you might have to wait overnight).
  6. Take out the containers. If there’s ice on the outside of the containers, remove the ice before comparing them (you might need to run some warm water over the outside of them first).
  7. Which ice looks the clearest?


Comments are closed.

Archaeological Museum in Croatia

Coffee Flavours

In this section, we take a quick look at the different modes of preparation of this wonderful drink and the methods followed across different countries and cultures.

Office Party

Following these tips can help ensure you don't become the talk of the party, for all the wrong reasons but can leave a lasting impression for all the right ones!

Home remedy for lowering blood pressure

A study published in the Journal of the American Medical Association investigated the effects consuming a small amount of commercially available dark chocolate, which contained flavanols, on blood pressure.

Art of beer

To get a good beer to enjoy, we need some rules to observe. In particular, the storage, temperature, cleaning the glass and play a major role.

Children like to be challenged

If you want to find educational toys that your youngsters will take pleasure in enjoying with, the most effective factor to do is have them check it out.

Recent Posts

Currumbin Wildlife Sanctuary, Gold Coast, Australia

The Currumbin Wildlife Sanctuary is the most popular wildlife and coastal rain forest attraction on the Gold Coast. This National Trust of Queensland property features hundreds of Australian animals in their natural habitat, and guests who visit Currumbin have the unique opportunity to experience Australia’s native wildlife in an up close manner. Certified by the Advanced Eco-Tourism Society, the sanctuary is an alluring world in which one can discover nature at its finest through displays, shows and guided tours.

Dry Or Wet Cat Food?

Cats are meat eaters, and even though commercially prepared food is formulated to address their specific nutritional needs, most store-bought cat food will contain both animal and plant materials, supplemented with vitamins, minerals and other essential nutrients.

Monitoring Software

The Internet can be tricky for parents to deal with because kids often need to use the Internet for school, but parents parents are often worried about the various activities that their children might be engaged in. Peer-to-peer file sharing can lead to lawsuits and even a criminal prosecution. Some teens might engage in activities online that are embarrassing to the family or may lead to viruses or hackers accessing the computer. Fortunately, there are various forms of monitoring software that can offer parental control.

Monitoring software can also be very helpful when parents are trying to learn what their children are up to, such as whether they are attending class or doing their homework.

Many teens use the computer purchased specifically for schoolwork to play computer games or chat with friends. Monitoring software can not only record activities on the computer, but smartphone software such as Mobile Spy can silently record the teen's GPS information, text messages and phone call information.

Monitoring software sits silently on a computer or mobile device and monitors all of the activities carried out on the device, encouraging the teen to consistently use the device for communication. Activity is usually uploaded to an online account so that the parent can monitor activity from anywhere without having to get close to the phone. This is crucial since parents will usually not have physical access to the phone without arousing suspicion.

Many monitoring programs also come with keystroke loggers, which log keys recorded on the computer, a contextual blocker, and features that allow parents to block certain websites. All of these features allow parents to have a peace of mind when allowing their teens to use the Internet.

Follow Us