Technology

Person A: “Pass me that spanner set, would you?” Person B: “Open or ring?” Person A: “What now?” Of course, it doesn’t take long at all to explain to Person A what the key difference is between ‘open end’ and ‘ring’-type spanner sets.  Open end is the type depicted in …

Every organisation is working remotely where multiple files are being shared through different kinds of sources every day and the best part is that different organisations are using a different kinds of tools in the whole process. All these kinds of activities are considered to be unavoidable because they are …

Introduction Debris. Space junk. After the Sun and planets formed, there was some material left over. These small chunks didn’t get close enough to a large body to be pulled in by its gravity. They now inhabit the solar system as asteroids and comets Asteroids are very small, irregularly shaped, …

If you think about a volcano, you know Earth must be hot inside. The heat inside Earth moves continents, builds mountains, and causes earthquakes. Where does all this heat inside Earth come from? Earth was hot when it formed. A lot of Earth’s heat is left over from when our …

Doesn’t the east coast of South America fit exactly against the west coast of Africa, as if they had once been joined? This is an idea I’ll have to pursue.” – Alfred Wegener said to his future wife, in December 1910. We can’t really get into Alfred Wegener’s head, but …

During World War II, battleships and submarines carried echo sounders to locate enemy submarines (Figure below). Echo sounders produce sound waves that travel outward in all directions, bounce off the nearest object, and then return to the ship. By knowing the speed of sound in seawater, scientists calculate the distance …

How Plates Movem : If seafloor spreading drives the plates, what drives seafloor spreading? Picture two convection cells side-by-side in the mantle, similar to the illustration in Figure below.  Hot mantle from the two adjacent cells rises at the ridge axis, creating a new ocean crust.  The top limb of …

Introduction Why is Earth the only planet in the solar system known to have a life? The main reason is Earth’s atmosphere. The atmosphere is a mixture of gases that surrounds the planet. We also call it air. The gases in the air include nitrogen, oxygen, and carbon dioxide. Along …

The sun is always up, even in the middle of the night in Antarctica during the summer. The photo on the left is Antarctica during the night in the summer. The photo on the right is of Antarctica during the day in summer. Similarly, in the winter Antarctica is mostly …

When Columbus sailed the ocean blue, and for centuries before and after, ocean travel depended on the wind. Mariners knew how to get where they were going and at what time of the year based on experience with the winds. Winds were named for their usefulness to sailors, such as …