1. a dog
   a paper bag
2. a monkey
   a penny

Many people think pennies are made of pure copper. However, they're actually only 2.5% copper and 97.5% zinc.

1. an apple
   an ear of corn
2. a steak
   a pear

An ear of corn is part of the flower of the plant, while the kernels are the seeds. There are around 800 kernels on each ear of corn.

1. a coffin
   baby shoes
2. medicine
   a present

In the 18th century, Holy Roman Emperor Joseph II wanted to preserve wood, so he ordered the production of reusable coffins. The trend didn't last long, however, as people began to complain.

1. a tree
   a cloud
2. a river
   a lake

The longest river in the United States is surprisingly not the Mississippi River. It's actually the Missouri River, which is 20 miles longer.

1. a tire
   a bruise
2. charcoal
   a concussion

Grilling is pretty much an American pastime. The most popular day to grill in America is the 4th of July.

1. a bird
   a plane
2. distance
   time

Your feet experience time slower than your face. This is because the closer you are to the Earth, the slower time goes.

1. roommates
   broommates
2. a witch house
   a monster house

The Salem witch hunt in 1692 was an example of how superstitions can influence society. During the trials, 18 people were put to death.

1. a chicken
   a fart
2. a butterfly
   a kite

When it comes to farts, 99% of them are odorless. The other 1% can clear a room.

1. an iceberg
   underwear
2. eggs
   flower

Icebergs have been proven quite deadly for passing ships over the years. The most famous case of an iceberg sinking a ship was the Titanic in 1912.

1. a dog
   socks
2. breath
   a shadow

The angle of the sun changes with the seasons. That's why shadows are longer in the winter.

1. an echo
   the radio
2. a phone call
   a cell phone

In Greek mythology, Echo is the name of a nymph. She loved the sound of her own voice.

1. water
   a cork
2. a hole
   ice

Oak barrels replaced clay during the reign of the Roman Empire. This is because they were more convenient for transportation since they didn't break as easily.

1. God
   silence
2. a fairy
   time

Science is beginning to determine that silence is actually good for the brain. It helps relieve tension and produces better brain activity.

1. weights
   a car
2. a wave
   a ton

Waste has become a major concern for the environment because of the amount produced each year. In fact, the average person produces around 1.5 tons of solid waste per year.

1. a locket
   a piano
2. a lockbox
   a book

The first piano was created in Italy by Bartolomeo di Francesco Cristofori in 1709. It was originally called gravicèmbalo col piano e forte, though the name was later shortened to piano.

1. Bees' Knees
   The Bees Boys
2. Bee My Lady
   BeeBop

Bees are critical for the environment because they spread pollen between plants. Sadly, humans wipe them out without realizing how vital they are.

1. a towel
   hair
2. the beach
   grass

The phrase "throw in the towel" is used in boxing to mean that a fighter is surrendering. The phrase was first recorded in a boxing match in 1915.

1. light
   the sun
2. a rainbow
   a star

Rainbows are actually a full circle of light. Humans can't see the full circle, however, because we are viewing the rainbow from the ground.

1. the ocean
   a full moon
2. a destroyed fortress
   a volcano

The moon is the Earth's only satellite. It's also the fifth largest moon in the solar system.

1. water
   candy
2. footsteps
   air

Dave Kunst was the first recorded person to walk around the entire planet on foot. It took him over four years to complete.

1. a fire
   a baby
2. a plant
   a cat

Much of ancient Rome was destroyed by a fire in 64 AD. History tells us that Emperor Nero was responsible for the fire because he wanted to rebuild the city.

1. Are you afraid?
   Are you breathing?
2. Are you here?
   Are you asleep?

Have you ever noticed how much your cat loves to sleep? That's no surprise if you have. A cat will actually spend two-thirds of its life sleeping.

1. a ship
   a lake
2. a fish
   a sponge

Sea sponges have been around for a long time. Evidence shows that they inhabited the Earth around 600 million years ago.

1. a peasant
   an ace
2. God
   a knight

The highest hand in poker is a royal flush. It consists of an ace, king, queen, jack and ten, all of the same suit.

1. an egg
   fruit
2. an acorn
   pie

Chicken eggs come in different colors. This has to do with the breed of chicken and not what the chicken eats, though a chicken's diet can affect the color of the yolk.

1. he's lonely
   the tree shakes
2. monkey see monkey do
   follow the tail

There are two categories of monkeys, Old World monkeys and New World monkeys. Old World monkeys live in Africa and Asia, while New World monkeys live in South America.

1. when it's open
   when it's closed
2. when it's ajar​
   when it's off its hinges

NASA has built the largest doors in the world which stand 456 feet high. There are four of these doors in all, and they take 45 minutes to open all the way.

1. wine
   a bride
2. a child
   a pumpkin

Wine is aged to increase the flavors of the drink. However, young red wine is actually better for you than old red wine because it contains higher tannin levels.

1. a fighting goose
   a dry goose
2. a cooked goose
   a mongoose

Through evolution, mongooses have become immune to snake venom. This makes the mongoose a worthy adversary to the slithering creatures.

1. put it in the attic
   wore it
2. lost it
   burned it

Camping has been linked to helping with depression and stress. This is partly due to the release of serotonin and melatonin while outdoors.

1. wave
   hydrophone
2. drop him a line
   sing

Whales are able to communicate with one another through echolocation, which involves sounds that can travel for miles through the water. Click sounds are the bases of this communication.

1. a robe
   underwear
2. pajamas
   nothing

There are various court levels in the United States Judicial system. The Supreme Court sits at the top of the Judicial branch, and they have the final say on all cases they choose to oversee.

1. the mummy
   the goblin
2. the vampire
   the werewolf

Monsters have lived in human lure for centuries. With the rise of cinema, naturally they found a place on the big screen as well.

1. brick
   stone
2. wood
   sand

On Harbour Island in the Bahamas, there's a beach known for its pink sand. Unsurprisingly, it's called Pink Sand Beach. The pink sand comes from dead coral insects.

1. mid-day
   noon
2. the early afternoon
   after breakfast

Dieting is all the craze for many Americans, though no one can agree on what diet actually works. Most nutritionists will encourage you to have a balanced diet and to adjust accordingly.