WHY DO PEOPLE BLUSH WHEN THEY'RE EMBARRASSED?
HERE
Blushing is a nervous reaction that triggers tiny blood vessels in your skin to widen. This allows more blood to flow to your skin and creates that reddening effect that you seem to know all too well. Blushing just happens to be your way of reacting to a particular situation. Some people may not visibly blush, but react differently e.g. tapping fingers or clearing throat. Whatever the reasons, everybody does go pink in the cheeks!:D
WHY DO PEOPLE HAVE DIFFERENT SKIN TONES?
The outer layer of the skin has special cells, which produce a pigment called melanin. The amount of melanin in the skin determines whether one is light or dark. Another pigment, carotene, found in the inner layer of skin determines how yellow one's skin tone is. People with lighter complexion have just a little melanin while the on's with a darker skin tone, have more melanin. The genes one inherits, determines the amount of these pigments in the skin.
WHY DO SOME GET A RUNNY NOSE WHILE EATING A SPICY MEAL?
Eating can stimulate the automatic nervous system to release the compound named Acetylcholine, which prompts increased production of saliva, stomach acid and mucus. The spicier the meal, the greater the reaction.
WHY DOES HUMAN BODY NEED WATER?
Human body consists of 60 per cent of water. This water is not like ordinary water as it contains specific substances, which are vital to our body. The water acts as a conductor of heat and also helps cleaning the body from inside. It washes out the toxins (harmful substances) from the body and regulates blood circulation. Whatever losses occur during this process are made up by food and liquid intakes.
HEREDANCING ICE (Experiment Yourself)
Things you will need:
1) Fill the glass with oil.
2) Drop a back of ice into the glass.
3) The ice should float in the middle of the oil. Watch the ice as it melts.
What Happens?
You will find drops formed on the oil. As the drops form and fall, the ice will rock from side to side and move up and down.
Why Does This Happen?
Both the ice and oil have almost the same density. Therefore, the block of ice dropped into oil will barely move. But as the water melts, it turns into denser , liquid water. The water tends to stick to the ice for a while before it drops off. When there is enough water on the ice, the ice sinks due to the density of water. Once the drops of water on the ice fall off, the ice floats up again. This sinking and floating movement appears as if the ice block is actually dancing!
HERE
Blushing is a nervous reaction that triggers tiny blood vessels in your skin to widen. This allows more blood to flow to your skin and creates that reddening effect that you seem to know all too well. Blushing just happens to be your way of reacting to a particular situation. Some people may not visibly blush, but react differently e.g. tapping fingers or clearing throat. Whatever the reasons, everybody does go pink in the cheeks!:D
WHY DO PEOPLE HAVE DIFFERENT SKIN TONES?
The outer layer of the skin has special cells, which produce a pigment called melanin. The amount of melanin in the skin determines whether one is light or dark. Another pigment, carotene, found in the inner layer of skin determines how yellow one's skin tone is. People with lighter complexion have just a little melanin while the on's with a darker skin tone, have more melanin. The genes one inherits, determines the amount of these pigments in the skin.
WHY DO SOME GET A RUNNY NOSE WHILE EATING A SPICY MEAL?
Eating can stimulate the automatic nervous system to release the compound named Acetylcholine, which prompts increased production of saliva, stomach acid and mucus. The spicier the meal, the greater the reaction.
WHY DOES HUMAN BODY NEED WATER?
Human body consists of 60 per cent of water. This water is not like ordinary water as it contains specific substances, which are vital to our body. The water acts as a conductor of heat and also helps cleaning the body from inside. It washes out the toxins (harmful substances) from the body and regulates blood circulation. Whatever losses occur during this process are made up by food and liquid intakes.
Things you will need:
- A tall glass or plastic container.
- Some vegetable oil.
- Ice (try making ice cubes with coloured water using food colour so that it is clearly visible)
1) Fill the glass with oil.
2) Drop a back of ice into the glass.
3) The ice should float in the middle of the oil. Watch the ice as it melts.
What Happens?
You will find drops formed on the oil. As the drops form and fall, the ice will rock from side to side and move up and down.
Why Does This Happen?
Both the ice and oil have almost the same density. Therefore, the block of ice dropped into oil will barely move. But as the water melts, it turns into denser , liquid water. The water tends to stick to the ice for a while before it drops off. When there is enough water on the ice, the ice sinks due to the density of water. Once the drops of water on the ice fall off, the ice floats up again. This sinking and floating movement appears as if the ice block is actually dancing!
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