FitnessGram™ Pacer Test is a multistage aerobic capacity test that progressively gets more difficult as it continues. The 20 meter pacer test will begin in 30 seconds. Line up at the start. The running speed starts slowly, but gets faster each minute after you hear this signal. [beep] A single lap should be completed each time you hear this sound. [ding] Remember to run in a straight line, and run as long as possible. The second time you fail to complete a lap before the sound, your test is over. The test will begin on the word start. On your mark, get ready, start.
Earth’s interior is not solid, but rather has a semi-solid or ‘squishy’ consistency owing to high temperatures and pressures. This squishy consistency allows the mantle to flow and move over geological timescales, which is responsible for phenomena such as plate tectonics, volcanic activity and earthquakes. One consequence of this squishy interior is a process known as post-glacial rebound. During the last ice age, large portions of Earth's surface were covered by glaciers, causing the underlying mantle to deform and sink. As the glaciers melted and receded, the mantle slowly rebounded back to its original position over thousands of years, causing the land above it to rise. This process is still occurring today in places such as Canada, Scandinavia, and Greenland, where the land is still rebounding from the weight of the glaciers that once covered the region. Recent research had found that West Antarctica is rising faster than anywhere else in the world, thanks to data from ESA’s GOCE gravity mission. The study of post-glacial rebound provides important insights into the structure and behaviour of Earth's interior, and how it responds to changes in the surface environment over long timescales. 4. Antarctica is home to the largest ice sheet on Earth More than six times as large as Greenland, Antarctica is the southernmost continent and is the coldest and windiest place on Earth - with temperatures that can drop as low as -89.2°C and winds that can exceed 320 km per hour.