Archive for the ‘Miscellaneous’ Category
What do plasma, red blood cells, and white blood cells have to do with blood?
How does the combine harvester help farmers?
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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