Characteristics of Isotonic and Hypertonic. 1  Concentration of solute and solution. 2  Examples. 3  Cells response in hypertonic and isotonic solution (See figure 1) 4  Water concentration gradient. 5  Solute concentration gradient. 6  Osmotic shift. 7  Movement of water. 8  Sports drinks.
However in my opinion some of the hardest and strongest rocks in the world are the quartzites found in the Witwatersrand in South Africa, Quartzite is a sandstone which has metamorphosed-that is it has been subject to high pressures and temperatures which have modified its structure.
Well, scientists just took one of geology's biggest controversies and shrunk it down to atomic size. By zapping single atoms of lead in a tiny zircon crystal from Australia, researchers have confirmed the crystal is the oldest rock fragment ever found on Earth â 4.375 billion years old, plus or minus 6 million years.ock around the clock: zircon crystal is oldest piece of Earth. Oldest Rock Speck Zeros In On Earth's Cooling Date. Oldest rock in the world proves Earth ready for life. The Oldest Bit Of The Earth's Crust Is In Australia And It's 4.4 Billion Years Old.