Tag: science & technology

Pumpkins are the traditional food used for carving jack-o-lanterns during Halloween. This tradition originated in Ireland and was brought to America, where pumpkins were more readily available than the turnips originally used.

The first iPhone was released on June 29, 2007. Apple announced it in January 2007 and it became available for sale later that year, making 2007 the correct year.

The Sun is Earth's primary source of energy. It provides the light and heat that drives Earth's climate system, powers photosynthesis in plants, and is the ultimate source of almost all energy on Earth (fossil fuels, wind, and hydroelectric power all indirectly come from solar energy).

Rubies are the red variety of the mineral corundum. The red color comes from trace amounts of chromium in the crystal structure. All other colors of corundum are called sapphires.

Pizza Hut was founded in 1958 in Wichita, Kansas, USA by brothers Dan and Frank Carney. The franchise started in the United States before expanding globally.

The three R's of recycling are Reduce, Reuse, and Recycle - in that order of priority. Reduce means consuming less, Reuse means finding new uses for items instead of discarding them, and Recycle means processing waste materials into new products.

The Nile River is traditionally recognized as the longest river in the world at approximately 6,650 km, flowing through northeastern Africa. While there is some scientific debate about whether the Amazon River might be longer, the Nile is the accepted answer in most educational contexts. The Indus, Brahmaputra, and Ganga are all major rivers but significantly shorter.

Prime numbers are integers greater than 1 that have exactly two factors: 1 and themselves. After 7, the next integer is 8 (not prime, divisible by 2), then 9 (not prime, divisible by 3), then 10 (not prime, divisible by 2 and 5). The number 11 is prime because its only factors are 1 and 11. While 13 is also prime, it is not the next prime after 7.

Ganymede is the largest moon in our solar system and orbits Jupiter. It was discovered by Galileo in 1610 and is one of the four Galilean moons of Jupiter. Ganymede is larger than the planet Mercury and is the only moon known to have its own magnetic field.