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Archive for the ‘Miscellaneous’ Category

  • Why is blood red?
  • What does my brain do, besides think?
  • How many parts are there to the brain?
  • What causes growing pains?
  • How is the human body a living machine?
  • How did my life begin?
  • How do I grow?
  • How big will I become?
  • Why are cells called building blocks?
  • What is DNA?
  • What are muscles made of?
  • What’s an Achilles heel?
  • Which muscles are the largest, and which ones are the smallest?
  • Is it easier for my face to laugh or frown?
  • Which states are the biggest farm states?
  • What’s a charley horse?
  • Which are the biggest and smallest bones?
  • Where is my rib cage?
  • Where is my spine?
  • Is there such a thing as a funny bone?
  • How is the body able to bend?
  • Why do my knuckles sometimes make a cracking sound if I bend them?
  • What is a jiffy?
  • What do a.m. and p.m. stand for?
  • How long is a fortnight?
  • How many bones are there in the human body?
  • How do bones grow?
  • Are bones hard as a rock?
  • How has farming changed in the United States?
  • What is a water clock?
  • Where does our food come from?
  • When and how did the first modern clocks develop?
  • What is a grandfather clock?
  • When was the wristwatch invented?
  • Who invented the alarm clock?
  • Is there a simple rhyme to help recall how many days are in each month?
  • What is the International Date Line?
  • When and why were time zones established?
  • When do the seasons officially start?
  • What is Daylight Saving Time?
  • What is a sundial and how does it work?
  • When was the last leap second added, and why?
  • What is the Chinese lunar calendar?
  • What is the difference between b.c. and a.d.?
  • Why is nuclear power dangerous?
  • What is the difference between a millennium and a century?
  • How are the months of the year named?
  • How are the days of the week named?
  • What is the difference between avoirdupois measurements and troy measurements?
  • How did ancient civilizations develop calendars, or ways for tracking days, months, and years?
  • Was one of the early Egyptian calendars a 365 day calendar?
  • What is the basis for modern timekeeping?
  • How long is each year?
  • When and why were leap years introduced?
  • How big is a hectare?
  • Which countries of the world have not formally begun converting to the metric system?
  • Where in the world do people live the longest?
  • How does nuclear energy work to make a city run?
  • Which is heavier, a pound of gold or a pound a feathers?
  • What is a cord used to measure?
  • How is a baker’s dozen different from a standard dozen?
  • Are the terms gnat’s eye and hair’s breadth true units of measure?
  • What is horsepower?
  • What is the metric system?
  • Why is the metric system called a decimal based system?
  • What is a cubit?
  • How were stones used as weights and measures?
  • Is a mile the same distance on land and at sea?
  • How are carats and carob seeds related?
  • Why do cities have dams?
  • How can U.S. money be used to measure items around the house?
  • What is an acre used to measure?
  • What is an abacus, and how long has it been used?
  • Is zero a number?
  • Why is learning math important?
  • What is a googol?
  • Is it possible to count to infinity?
  • How are measuring units related to the human body?
  • What is Euclid’s Elements?
  • What is a perfect number?
  • Why is the number 10 important?
  • How long will it take me to count to one billion?
  • What is so special about the number 2?
  • What are Roman numerals?
  • Which airport is the busiest in the world?
  • How does a fire extinguisher work?
  • Which city has the most elaborate subway system?
  • Has a robot been invented to help with housework?
  • How do robots like ASIMO and Mahru work?
  • Where and when did numbers originate?
  • Who was Pythagoras?
  • How does a thermos keep cold things cold and hot things hot?
  • How does a coffeemaker cook up the morning’s brew?
  • How does a toaster work?
  • How does the metal switch in a toaster bend?
  • How can a microwave oven cook food so fast?
  • Why do burning things make smoke?
  • How does a magnifying glass work?
  • Who invented the zipper?
  • What do many household appliances have in common?
  • Where are the largest factories located?
  • How does a vacuum cleaner pick up dirt?
  • How does a washing machine clean our clothes?
  • How does a refrigerator work?
  • How does a camera take pictures?
  • What was the daguerreotype?
  • How does an X-ray take pictures of bones?
  • What are lasers?
  • What are bar codes?
  • How does a laser make musical sound off of a CD?
  • How do mirrors use light to create a reflection?
  • When was the first post office in the United States established and how did the system grow?
  • Why do I see my shadow on the sidewalk on a sunny day?
  • How does a light bulb work?
  • How does an ear thermometer read body temperature?
  • Why do certain items glow in the dark?
  • Which U.S. city has the most public landmarks?
  • Which city is the smallest?
  • How is an MP3 player related to a computer?
  • What is e-mail?
  • How was mail delivered before there were mail carriers?
  • What is snail mail and how does it travel?
  • What happens to the mail when it gets close to its destination?
  • Who invented the first computer?
  • Which types of computers predated Babbage’s analytical engine?
  • When was the earliest programmable computer built?
  • What is the Internet?
  • How does the Internet work?
  • How does a search engine work?
  • How does a fax machine work?
  • How does a cellular phone work?
  • Which city is the largest?
  • What is a smartphone?
  • How does a computer work?
  • What is a silicon chip?
  • How many computers are there in the world?
  • Who invented radio?
  • What was the Audion?
  • How does television work?
  • What is high definition television?
  • How does a telephone work?
  • How did people communicate from their cars before cellular phones?
  • How are newspapers made?
  • What is a hornbook?
  • How was printing done before computers and motor driven presses?
  • What is the difference between a metropolitan area, a city, and a megalopolis?
  • Why do newspapers fade and yellow within a few months?
  • What is the Morse code?
  • Who were the Wright brothers?
  • What is a supersonic airplane?
  • How do helicopters fly?
  • How do boats float?
  • How are boats powered to move through the water?
  • How do submarines sink below the water and then rise?
  • How do submarine pilots know where they are going when they are underwater?
  • What is a kissing bridge?
  • How are tunnels built?
  • How does a roller coaster work?
  • How do airplanes fly?
  • How do pilots steer an airplane?
  • Why is America called a “melting pot”?
  • Which religions are the most widely practiced around the world?
  • When did people first use electric cars?
  • What are the types of bridges, and how do they work?
  • What is the importance of America’s interstate highways?
  • Where is the longest bridge?
  • Who built the Brooklyn Bridge?
  • Which parts of the world have the fastest growing populations?
  • If I don’t have a thermometer handy, can I count cricket chirps to calculate the temperature outside?
  • Who were Gabriel Fahrenheit and Anders Celsius?
  • How has the world’s climate changed over the years?
  • What was the Little Ice Age?
  • How many kinds of rock does Earth have?
  • Can mountains grow and shrink?
  • What is an avalanche?
  • What is Mount Rushmore?
  • Why is the Grand Canyon unique?
  • Why are hurricanes called monster storms?
  • Is it true that no two snowflakes are the same?
  • Why are tornadoes so dangerous?
  • How far can a tornado lift and carry items?
  • When were the hottest and coldest days of the year?
  • Was pond ice used as the first refrigerator?
  • Is there life on Mars?
  • What are dog days?
  • Why are rain clouds gray?
  • What causes a rainbow?
  • How thick is a lighting bolt?
  • How is Mars different from Earth?
  • How far away is thunder and lightning?
  • Where is the wettest place in the world?
  • Where is the driest place in the world?
  • Which snowstorm was the worst in U.S. history?
  • Is it true that at one time there was no oxygen?
  • How does the greenhouse effect work on Earth?
  • Why is the sky blue?
  • How do we see the wind?
  • Where is the windiest place on Earth?
  • What are clouds made of?
  • Can it rain cats and dogs?
  • How do clouds float?
  • Why do jet airplanes leave white trails in the sky?
  • What are moonquakes?
  • How high could you jump on the Moon?
  • Does the Moon really have volcanoes?
  • How does the Moon affect the ocean tides?
  • Why does the Moon follow us when we’re driving?
  • Why is Earth mostly crater-free compared to the pockmarked Moon?
  • What is air made of?
  • Why is the ozone layer important to Earth?
  • Did the continents always look like they do now?
  • Why does Earth look blue from outer space?
  • Is it true that parts of Earth are always covered in ice?
  • Why did life develop on Earth and not on the other planets?
  • Why do deserts have special plants and animals?
  • Where are the world’s rain forests?
  • What is the Arctic tundra?
  • What is the Moon?
  • Which planets experience the greenhouse effect?
  • Is there a Man in the Moon?
  • Will people live in space one day?
  • How old is Earth?
  • How big is Earth?
  • Is the Earth round?
  • How is Earth like an onion?
  • Could the greenhouse gas buildup ever make Earth as hot as Venus?
  • How many continents are there?
  • Is there a place where two continents almost touch?
  • Who was the first man in space?
  • Who was the first woman in space?
  • Who was the first African American in space?
  • Which is the windiest planet?
  • Can astronauts drink soda in space?
  • How many U.S. astronauts have walked on the Moon?
  • When were animals sent up in space?
  • What is the space station Skylab?
  • What was the Challenger disaster?
  • Where in space could you ice skate?
  • How does a rocket blast off?
  • What is the U.S. Census?
  • When did the first spacecraft go up into space?
  • What is a space shuttle?
  • What do the astronauts wear in space?
  • What has the Hubble Space Telescope discovered?
  • What are space probes?
  • What does a satellite do?
  • What is aloe vera?
  • Are marine plants used in toothpaste?
  • Why do people plant marram grass on sand dunes?
  • What were ancient spices used for?
  • Are there plant species that are endangered?
  • Why are rain forests so important to the health of our planet?
  • How many people are there in the world?
  • Why did people begin exploring?
  • How many kids are there in the world?
  • Which fruit tree makes the heaviest fruit?
  • Did Johnny Appleseed really plant apple trees?
  • Which tree produces the largest nut?
  • How do coconuts swim?
  • Which tree was used in the fledgling shipbuilding industry?
  • Which plant is used to make linen?
  • How is cotton harvested?
  • How powerful are astronomers telescopes?
  • What is paper made of?
  • Which tree is the biggest and tallest?
  • Which tree can have more than 2,000 trunks?
  • What is the Joshua tree?
  • Which tree grows on stilts?
  • Why do leaves change color in the autumn?
  • Who invented the telescope?
  • Why are these trees called deciduous?
  • Is it true that hundreds of wild things live in oak trees?
  • What do fir and pine trees tell us about the weather?
  • What is moss?
  • What is fungi?
  • Why are some mushrooms called toadstools?
  • How many meteorites reach Earth in one year?
  • What is a giant puffball?
  • What is bracket fungus?
  • What are the longest-living trees in the United States?
  • How can you tell how old a tree is?
  • What else do the tree rings tell us?
  • What is the difference between a meteor and a shooting star?
  • Why do cacti and desert plants have spines, and not leaves?
  • Why do tropical rain forests grow so many plants?
  • Which plants grow in the rain forests?
  • Can a plant grow in ice and snow?
  • What is lichen?
  • What are ferns?
  • Are fiddleheads and ferns related?
  • How do carnivorous plants digest their prey?
  • Which plants drown bugs?
  • Is the Amazing Flynapping Arum of Sardinia a circus performer?
  • Does a Venus flytrap really snap up live flies?
  • How do plants defend themselves?
  • How many poisonous plants are there in the world?
  • Is poison ivy really poisonous?
  • How was hemlock used to poison in ancient times?
  • How do nettles sting?
  • What makes a plant bloom at the right time of year?
  • Do all flowers close up at night?
  • Can you eat flowers?
  • What it the largest flower in the world?
  • Which is the smallest flower in the world?
  • Which flowering plant can you float on?
  • Are all flowers fragrant?
  • What is an asteroid?
  • What are carnivorous plants?
  • How do flowering plants make their seeds?
  • Does the expression “Open sesame!” have anything to do with sesame seeds?
  • What is the difference between self pollination and cross pollination?
  • Are there plants that do not grow from seeds?
  • What is the difference between a bulb, a corm, and a tuber?
  • What are comets?
  • When did the first flowers bloom?
  • What is the difference between annual, perennial, and biennial flowers?
  • Why are so many flowers brightly colored?
  • Who is called the “father of botany”?
  • Do all plants have leaves?
  • How are a water lily’s leaves different?
  • What are the patterns of stars called?
  • Do all plants have flowers?
  • What is a seed?
  • How do seeds become plants?
  • Do animals ever carry seeds?
  • Which plant spreads its seeds with the help of children at play?
  • Why does a peacock spread its tail?
  • What is a quasar?
  • How fast can a hummingbird fly?
  • How are plants different from animals?
  • How are plants and animals related?
  • What is plant food from the nursery made of?
  • How do plants get their nutrients?
  • How do plants grow?
  • How many different types of plants are there?
  • Can all birds fly?
  • Why do birds fly south for the winter?
  • The bald eagle’s head is covered with white feathers. So why is it called the bald eagle?
  • Why is a bird’s beak important?
  • How do birds replace their feathers?
  • Why do birds often crash into windows?
  • What do worms eat?
  • Which birds are called birds of prey?
  • Can an eagle see a mouse from two miles away?
  • How do lizards and snakes smell?
  • Which snake builds a nest to care for its young?
  • Why do snakes have scaly skin?
  • Are crocodiles living dinosaurs?
  • What is the difference between an alligator and a crocodile?
  • What’s the difference between a lizard and a salamander?
  • How do frogs make their loud croaking sound?
  • How do birds fly?
  • What is a black hole?
  • Is it true that a salmon will always return to its birthplace?
  • Which animals live inside empty seashells?
  • Is coral a plant or an animal?
  • Which male sea creature keeps its young in a pouch?
  • Which planet could melt metal?
  • What is a supernova?
  • What is the difference between a porpoise and a dolphin?
  • Why does a lizard need to lie in the sunshine to get energy?
  • What do spiders do with their victims?
  • Do doctors ever use bugs for medical reasons?
  • Is there a place on Earth where the Sun does not rise?
  • How can fish breathe underwater?
  • Are there certain fish that can live without water?
  • Can a fish fly?
  • Which undersea creatures are known for making electricity?
  • Which fishes blow themselves up like balloons?
  • Which fish makes a nursery out of bubbles?
  • Why do insects have eyes with thousands of lenses?
  • What do the spots on the wings of butterflies and moths do?
  • Do some insects use slaves to survive?
  • What is the largest insect on Earth?
  • Which insect is sometimes called a “vicious predator”?
  • What’s the difference between an insect and a spider?
  • How long does it take a spider to spin its web?
  • What is ballooning?
  • Why is the walrus nicknamed tooth walker?
  • Is it true that a shark can smell a drop of blood from a mile away?
  • How long is the giant anteater’s tongue?
  • How many different kinds of insects are there?
  • Why are there so many insects?
  • How do insects grow?
  • Why do butterflies and other insects fly from flower to flower?
  • Where does the Sun shine the most?
  • Which mammal spends the most time sleeping?
  • Which mammal is the smelliest?
  • Why do camels have humps?
  • Why do zebras have stripes?
  • Which African animal can eat up to half a ton of plants each day?
  • What happens during an eclipse of the Sun?
  • Do bears really sleep through an entire winter?
  • Why are polar bears white?
  • Do bighorn sheep break their horns when they charge?
  • Which mammals fly?
  • What is special about the Galapagos Islands?
  • How are bats able to see in the dark?
  • What would happen if there wasn’t a Sun?
  • Are there any poisonous mammals?
  • Which mammal is the fastest?
  • Which mammal is the slowest?
  • Which animal is both the biggest mammal and the largest living creature on Earth?
  • What is an endangered species?
  • Did dinosaurs get sunburned?
  • Did dinosaurs communicate?
  • How hot is the Sun?
  • Were dinosaurs warm blooded?
  • Which dinosaur was the fastest?
  • What other types of animals lived at the time of the dinosaurs?
  • Why did dinosaurs become extinct?
  • Will the dinosaurs ever come back?
  • How many different kinds of animals are there?
  • What is a mammal?
  • When did the dinosaurs live?
  • Which was the biggest dinosaur?
  • What does the word dinosaur mean?
  • Which was the smallest dinosaur?
  • What did dinosaurs eat?
  • Would it hurt if a plant eating dinosaur bit you?
  • What did dinosaurs use their teeth for?
  • Did all dinosaurs lay eggs?
  • What were the first animals to appear in water and on land?
  • What were the first primitive plants to appear on land?
  • What are fossils?
  • Which country pollutes Earth the most?
  • What is Earth Day?
  • Have scientists ever discovered an entire animal fossil?
  • Will animals and plants that die today become fossils?
  • When did the woolly mammoths live?
  • What is the Sun made out of?
  • What is acid rain?
  • Why is it important to conserve water?
  • Why do stars twinkle?
  • Why is it important to recycle?
  • What does the slogan “Reduce, Reuse, and Recycle” mean?
  • How much garbage do we throw away every year?
  • Do people still mine for gold in America?
  • What is a carbon footprint?
  • When do I send greenhouse gases in the air, and how can I make a difference?
  • Are human activities responsible for the warming climate?
  • How much oil is there left in the world?
  • When was the greenhouse effect discovered?
  • What is the greenhouse effect?
  • What is the difference between a planet and a star?
  • What is climate change, and how does it differ from global warming?
  • Why is smog bad for us?
  • What is smog?
  • What is a tsunami?
  • What are icequakes?
  • When is earthquake season?
  • What are earthquake zones?
  • How do earthquakes happen?
  • What is the Ring of Fire?
  • How do volcanoes erupt?
  • What is the difference between a planet and a moon?
  • What is an estuary?
  • Do rivers ever dry up?
  • Why do planes disappear in the Bermuda Triangle?
  • What are coral reefs?
  • What is an iceberg?
  • What is the difference between an ocean, a sea, a gulf, and a bay?
  • Why is the ocean salty?
  • How much of Earth is covered with land and water?
  • Where is the deepest hole?
  • How are caves formed?
  • Is there life on planets in other solar systems?
  • Which planet might float on water?
  • Which planets have rings?
  • Is a day the same on all planets?
  • Who named our planets?
  • What is Planet X?
  • Which planets are called the gas giants?
  • Why isn’t Pluto a planet anymore?
  • Which planets are the rocky planets?
  • How many planets are there?
  • What is a planet?
  • What is an orbit?
  • How old is the solar system?
  • What is the solar system?
  • Why is the Andromeda galaxy so special?
  • Which galaxy is closest to ours?
  • What is outer space?
  • Is Earth at the center of the universe?
  • Is it possible for the universe to collapse instead?
  • Is the universe expanding?
  • What is a light year?
  • How does the universe stay together?
  • How big is the universe?
  • How did the universe begin?
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