The potato chip as we know it today was __ at a diner in New York. After hearing a customer complain that his potatoes weren't fried enough, the cook chopped them paper thin and threw them in the fryer. After that the chip was a hit!

Drinking water can come from different resources. For one, it can be pumped from the ground through____. Groundwater is then purified, so that people can drink it. Drinking water also comes from rivers, lakes, and streams.

The first video game was created by a scientist names Michael Higginbotham in 1958. He invented a game called "Tennis for Two." The game was designed to be played in an oscilloscope, a special ____ designed to measure electrical current. 

Monkeys pick bugs off each other in a process called grooming. Although it may look __ to us, it is very important to them. Grooming keeps up good relationships among other animals. It is a way monkeys show friendship. 

Volcanoes sit on giant chambers of hot liquid rock. Hot magma ____ through and breaks the top layer of the Earth's crust. As magma cools and hardens, it forms the main body of a the volcano called the cone. 

Feet smell for the same reason that armpits smell- because of sweat. Sweat has all kinds of salts and other chemicals in it. Sweat tends to get trapped in socks and shoes, and it doesn't ____ well; so, it gets concentrated and produces odor

During sleep, your muscles relax,  your breathing slows, and your heart rate decreases. Sleep is your body's way of ____ after a day of thinking and moving. Your brain doesn't turn off completely when you sleep, which is why you dream. 

The Titanic was one of the biggest ships of its time, people thought nothing could destroy it. But while on its first voyage in April 1912, it struck an iceberg. The entire world was in disbelief when the "__ ship" sank!

John F Kennedy was the youngest U.S. president. He was only 43 years old when he was ___ to office. His presidential term was cut short by his assassination, but Kennedy still managed to inspire the country.

Kids around the world love their teddy bears. The first known teddy bears were made by a young girl in Germany. She started making them to make extra money for her family. These cuddly ____ animals got their name thanks to a cartoon.

Flamingoes are pink because of all the shrimp they eat! Chemicals inside the shrimp ____ the feathers of the flamingo a reddish color- that's why they range in color from dark red to bright pink.

There are close to 4,000 known species of frogs, including toads. They range in size from less than half an inch to nearly a foot long and come in a rainbow of ____ and patterns. Frogs eat insects and worms with their long, sticky tongues.

Pigs can float in water, and some pigs like to swim! Pigs on the island of Staniel Cay in the Bahamas like to paddle after tourist boats to beg for ___. Pigs like mud or water because it keeps their body temperature cool.