Earthquakes are usually caused when rock underground suddenly breaks along a fault. This sudden release of energy causes the seismic waves that make the ground shake. When two blocks of rock or two … [Read more...]
Adventures in Barrow, Alaska
For more information about my south pole adventures see: Follow Janice and Randy to the South Pole. photo credit: 阿拉斯加巴羅-鯨骨拱門-20130530-賴鵬智攝-1 via photopin (license) … [Read more...]
Five Oceans of the World
Which is Bigger? Which is Deeper? About 71% of the Earth's surface is covered with water. The largest bodies of water are called oceans and there are five ocean in all. Books published prior to the … [Read more...]
What are Meridians?
Compare and Contrast Longitude and Latitude The model in the "Around" activity below compares Earth's meridians, which are also called lines of longitude. Meridians (lines of longitude) circle the … [Read more...]