Frogs and toads share many features, so they are often confused. They both belong to the Anura order of the class Amphibia, but they usually have features that help to separate them. Frogs have long legs to enable them to jump and mucus-covered skins. Toads are fatter, have dry skin, and have shorter legs. Frogs …
When lips lose moisture, the skin covering them can become tight and crack or become flaky, sometimes resulting in sore and even bleeding lips. Unlike other parts of our body, our lips do not contain oil glands, which means they are more likely to become dry. Other factors then exacerbate the situation. So, a lack …
Neptune’s eye-catching deep blue colouring is caused-by the methane gas in its atmosphere, absorbing red light and reflecting blue. 2. Due to the fast nature of Neptune’s spin around its axis, its equatorial diameter is 846 kilometres larger than its polar diameter. 3. Around its equatorial, region Neptune is privy to winds in excess of …
Perhaps surprisingly, there are not separate compartments inside a tube of striped toothpaste. To get them in the tube in the first place, the different coloured pastes are merged into a divided nozzle, which keeps the colours separate while dispensing them evenly into the tube from the bottom via a funnelling machine. If you were …
EQUIPMENT: Saucepan, Food colouring, Spatula, Stove, Water, Glycerine (from a pharmacy), Vinegar, Tin foil. To start, take your saucepan and add four saucepan and add four tablespoon of starch. Add a teaspoon of vinegar and glycerine to the mix and stir vigorously until it is completely mixed together. Take the saucepan and place it on the stove on a low heat. Stir the …
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The largest British tree by volume is a sessile oak in Herefordshire, which is believed to take up 107.6 cubic metres (3,800 cubic feet). In terms of height, a Douglas fir in Scotland has been identified as Britain’s tallest tree, reaching 66.4 metres (217.1 feet) However, there may be larger candidates that have not yet …
A cadmium sulphide photoresistor (CdS cell) changes the resistance circuit depending on the amount of shining on it. When lots of light on a CdS cell, resistance is low, so it conducts electricity well. When there is little light, the photo-resistor has a high resistance, so not much current can flow. The change in current …
Slugs like yeast. They can smell the yeast in beer from about half a metre (1.6 feet) away, so you need to place beer traps no more than a metre (3.3 feet) apart. Beer traps aren’t very effective, though. Studies with time-lapse cameras have shown that most slugs manage to drink from a beer trap …
Photons are tiny packets of light, Kl and have energy in the form of electromagnetism. They don’t have mass, but momentum – a property usually attributed to an object’s mass. The momentum of a photon is dependent on its frequency. Think of a photon as a little packet of energy made of oscillating electric and …
The friction created when you strike a match triggers a series of chemical reactions, causing it to ignite and then combust. To produce a flame, you need something to burn (fuel), oxygen and enough heat. The match head contains sulphur, glass powder and an oxidising agent. Meanwhile, the striking surface is made of sand, powdered …
Most of the salt in the ocean comes from a process that takes place on land. Rainfall contains carbon dioxide from the atmosphere, making it acidic. As rain erodes rocks on land, it releases ions – atomic particles that carry an electric charge. Rivers and streams carry these dissolved ions out to the ocean. Some …
That would be the saltwater crocodile. Bite force is partly about raw size, but it also has a lot to do with the shape of the jaw and the position of the muscles. Bite force hasn’t been measured directly for every known animal, but those we have measured allow us to estimate the bite force …
The composition of dust depends on where the dust is located and the habits of the people who live there. There’s a myth that most dust inside your house primarily comprises flakes of shed human skin, but that’s not true. Most of your skin flakes go down the drain when you wash. Dust does have …
The 1967 Outer Space Treaty explicitly forbids any government from claiming ownership of any celestial object or the empty space in between them. 100 nations have signed and ratified this treaty, including all those currently with a space programme. The treaty doesn’t mention ownership claims by individuals or corporations though and this loophole has been …
It’s not us that become resistant, it’s the bacteria we are trying to kill. Bacteria multiply quicker than other organisms and have simpler genomes, so random mutations happen more often. Some of those might give them a tougher cell wall or a way to metabolise a toxin. Low doses of antibiotics given to farm animals, …