Purple "O" Purple Question & Answers

Why aerodynamic shape is important for vehicles?
Why all clouds don't bring rainfall?
Why are balloons used for astronomical research?
why are black holes formed?
Why are blast furnaces used?
Why are carbohydrates necessary for us?
Why are cells considered important?
Why are circuit boards used?
Why are crystals formed?
Why are dams built?
Why are fungi not green in color?

Why do cacti have no leaves?
Why do cloves make the land fertile?
Why do coasts have mild climate?
Why do cyclones occur?
Why do days and nights occur?
Why do eclipses occur?
Why does a nebula exist?
Why does Jupiter have the great red spot?
Why does lightning occur during thunderstorms?
Why does our heart beat?
Why does surface of the moon have craters?
Why does the Arctic sea have icebergs?
Why are geostationary satellites needed?
Why are lakes of different size and shapes?
Why are latin names given to all living things?
Why are microscopes used by scientists?
Why are quasars of so much interest to the scientists?
Why are satellites launched into space?
Why are solar panels kept on the roof top?
Why are so many pylons erected?
Why are some flowers very colorful?
Why are some frog poisonous?
Why are space researches pursuing mars?
Why are space stations required?
Why are the coral reefs protected?
Why are there many extinct volcanoes?
Why are the rhinos endangered?
Why does the chameleon often change its color?
Why does the lightning flash?
Why does the moon shine?
Why does the peacock raise its feathers?
Why do frogs disappear in winter?
Why do gipsies stick to their old tradition and custom?
Why do giraffes have long necks?
Why do hot springs occur in some areas?
Why do houses in the mountains have steep roofs?
Why do leaves change color in autumn season?
Why do leaves fall in autumn season?
Why do maps show north at the top?
Why do meteors crash into the Earth?
Why don't the women have beards?
Why do nuclear reactors need continuous monitoring?
Why do we take antibiotics?
Why do we wake up from sleep?
Why do we wear shoes?
Why do winds occur?
Why Elvis Presley is considered to be immortal?
Why every army had drummer boys?
Why Garibaldi unified Italy?
Why has deadalus been built?
Why has SETI been launched?
Why has steel become an important material?
Why have the optic fibers proved useful?
Why is electricity transmitted at high tension?
Why is exercise useful for us?
Why is helicopter not a mordern discovery?
Why is Henry Ford remembered?
Why do oil rigs sometimes catch fire?
Why do ostrich eat stones?
Why do people believed in witches?
Why do people collect stamps?
Why do people dance?
Why do people love to go for trekking?
Why do plants have roots?
Why do plants produce seeds?
Why do scientists wear protective clothing?
Why do seas never dry up?
Why do seasons occur?
Why do some birds have long legs?
Why do some insects have bright colors?
Why do some of us wear glasses?
Why is it difficult to explore the depth's of the sea?
Why is it important to protect the back of the neck?
Why is litmus paper used in chemistry?
Why is our blood red in color?
Why is saturn termed as the most beautiful planet?
Why is snow white in color?
Why is the banana a plant a tree?
Why is the brain the most important part of our body?
Why is the Earth's gravity not the same at all places?
Why is the Halley's comet named so?
Why is the human hand adapted to all types of work?
Why is the invention of wheel attributed to Mesopotamia?
Why is their life among the stars?
Why is the ladybird useful to man?
Why are the spiders not insects?
Why are UFO's so popular?
Why are viruses and bacteria different?
Why are vitamins essential for life?
Why are water falls formed?
Why are waves formed in the sea?
Why are wind tunnels used?
Why are wind turbines a source of power?
Why are X-rays taken?
Why atoms are present everywhere?
Why can man walk on two legs?
Why can't the fish survive out of water?
Why can we see different colors?
Why car racing has become a popular adventure sport?
Why chimpanzee is considered to be a special type of monkeys?
Why do some peoples suffer from asthma?
Why do some plants survive even in the deserts?
Why do stars die?
Why do the cells have chromosomes?
Why do the flowers have so many varied shapes?
Why do the Galaxies have different shapes?
Why do the muscles pain after exercise?
Why do the salmons go upstream to spawn?
Why do the ships navigators depend on microwaves?
Why do the stars seem to twinkle?
Why do the trees have bark?
Why do tides occur?
Why do tornadoes occur?
Why do volcanoes erupt?
Why do we all perspire?
Why do we celebrate easter?
Why is the lageo's used?
Why is the pole star so important?
Why is the sea water salty?
Why is the seaweed of so many colors?
Why is the skin important for us?
Why is the space shuttle used nowadays?
Why is the Tiros 1 a famous satellite?
Why is the year 1900 important for science?
Why is the year 1901 important in American history?
Why is touch an important sense that we possess?
Why is vaccination necessary against some diseases?
Why is water essential for us?
Why it is foggy in winter?
Why mars is known as the red planet?
Why no other planet except Earth supports life?
Why sea beaches are sandy?
Why did American Revolution take place?
Why did Australia recruit the army to destroy Emu?
Why did dinosaur become extinct?
Why did Gandhi visit London in 1931?
Why did machines and factories dominate production?
Why did the battle of Britain take place?
Why did the Boxer rebellion take place?
Why did the Cold War start?
Why did the Egyptians make Mummies?
Why did the fauve movement start?
Why did the first humans resemble the Apes?
Why did the first World War happen?
Why did the first World War start?
Why did the Japanese use Kamikaze?
Why sky is blue in color?
Why skylab is named so?
Why some islands are ring shaped?
Why some people are left handed?
Why space probes are considered important?
Why tanks were built?
Why terracing is helpful for farmers?
Why the D-Day landing was a turning point in the second World War?
Why trade was considered the backbone of Greek economy?
Why transmission of intercontinental television is possible?
Why was archimedes so popular?
Why was barbed wire used in the first World War?
Why was Berlin airlift done in 1948?
Why did the Korean war take place?
Why did the reformation occur?
Why did the renaissance happen?
Why did the Russian Revolution break out?
Why did the Russo Japanese War of 1904-05 take place?
Why did the scientists appeal against nuclear weapons in 1955?
Why did the second World War break out?
Why did the Titanic sink?
Why did the young Turks revolt in 1908?
Why did USA enter the first World War in 1917?
Why do animals like salt?
Why do arteries and veins differ?
Why do asteroids look like small planets?
Why do astronauts wear space suits?
Why do bats fly only at nights?
Why do birds have excellent vision?
Why do birds sing?
Why do we celebrate mothers day?
Why do we dream?
Why do we feel hungry?
Why do we feel thirsty?
Why do we find a lot of snails usually after rain?
Why do we get allergies?
Why do we have a skeleton?
Why do we have high temperature when we are ill?
Why do we need numbers?
Why do we need oil?
Why do we remember Charles Darwin?
Why do we remember Copernicus?
Why do we remember Gerardus Meercator?
Why do we remember Wright Brothers?
Why do we resemble our parents?
Why do we see shooting stars at night?
Why do we sometimes see rainbow in the sky?
Why do we study quantum physics?
Why was Germany divided?
Why was gunpowder used in earlier wars?
Why was Hercules worshipped?
Why was Israel created?
Why was NATO founded?
Why was Rasputin assassinated?
Why was Robin Hood considered to be an important character in literature?
Why was the balfour declaration made?
Why was the league of nations established?
Why was the marshal plan framed?
Why was there a revolution in mexico in 1911?
Why was the Russian Royal family murdered?
Why was the Yalta conference held in 1945?
Why was Timur Lang famous?
Why we are able to hear sounds?
Why were fascist parties formed?
Why were flags invented?