.... and explodes out lava and ash. The Hawaiian volcanoes, Mt. Hood, Mt. Etna, Vesuvius, and Mt. Saint Helens are examples of volcanic mountains. Rocks are hard but in time they can bend or fold producing Folded mountains. The Alps formed as the Eurasian plate pushed against the African plate. Other examples of folded mountains are the Rockies, Himalayas, Appalayas, and the Andes. Fault-block mountains are formed when one plate pushes or pulls away from another plate. In the Earth, hot currents of magma or molten rock may well up and crack the weakened crust above. As the crust cracks, blocks of rock rise or fall forming Fault-block mountains. Examp .....

.... used elements is Carbon 14. Carbon 14 is known to have a half life of 5,370 years. By measuring the amount of Carbon 14 in a rock, the age of the rock can be estimated. In the case of inorganic and older rocks, Carbon 14 would not be a good choice because of its short half life. Uranium, which is known to have a much longer half life would be a good alternative. If a pound of the metal Uranium is left to decay, it would take approximately 4.5 billion years for it to turn into half a pound of Lead ( Howter, 1996, Radiometric Dating: An Exercise in Faith). As it turns out, this is what scientists believe to be. The assumption that the earth is 4.5 billi .....

.... an alarming rate.(Durning 1992). However, unfortunately recycling has proven that it is quite costly. Although recycling of wastes material solves the problem of garbage disposal at landfills, and saves resources, it does nevertheless entail large hidden costs in collecting, sorting and manufacturing; therefore, it is necessary for the government to overcome such problems of recycling to be worth while and for manufacturers and consumers to consume less. Recycling has proven its efficiency in solving the problem of garbage disposal at landfills1. By the accumulation of garbage throughout the years, space available for garbage has largely diminished. In the sta .....

.... acidic. It is caused by today's industry. When products are manufactured many chemicals are used to create it. However because of the difficulty and cost of properly disposing of these products they are often emitted into the atmosphere with little or no treatment. The term was first considered to be important about 20 years ago when scientists in Sweden and Norway first believed that acidic rain may be causing great ecological damage to the planet. The problem was that by the time that the scientist found the problem it was already very large. Detecting an acid lake is often quite difficult. A lake does not become acid over night. It happens over a peri .....

.... solubility product constant, Ksp is given in the following example: Ksp = [Ag][Cl] Ksp for PbI2 is Ksp = [Pb][I]2 This gives the relationship between the ions in the saturated solution and is the maximum concentration possible without creating precipitation. In this lab, solutions of lead nitrate and potassium iodide will be mixed at a number of dilutions. The reactions will then be observed to see at which point a precipitate no longer occurs. Ksp will then be stated as a range of values at room temperature, and the precipitate test tubes will be heated until the precipitate is dissolved so that Ksp may be observed and determined at different levels. .....

.... over five hundred . Muscle fibers are basically classified according to their size and speed of contraction. There are three main types of muscles. The first is skeletal. Skeletal muscle makes up the largest mass of muscle in the body, and is the type of muscle that is attached to bones and moves the skeleton in a conscious control, so therefore it is a voluntary muscle. Its contractions are short and strong, providing the force needed for movement. The muscle contractions produce and provide some heat needed in the body. Skeletal muscle tissue is made up of smaller fibers called myofibrils. These myofibrils are composed of even smaller protein filaments. The .....

.... where it will serve as a weather satellite for a full martian year (two full Earth years). The next Mars lander is scheduled for January 3, 1999 liftoff. Mars Polar will touch down on Mars in December 1999, carrying two softball-size penetrators, the Deep Space 2 mission, that will crash land on Mars some 60 miles north of the landing site. All is going well with ’s Saturn-bound Cassini mission and the Deep Space 1 mission. Cassini will reach Saturn in June 2004 and Deep Space 1 will rendezvous with asteroid 1992KD in July 1999. The Galileo spacecraft at Jupiter went into a safe mode just six hours before its scheduled flyby of Europa on November 21-22 .....

.... the ability of being able to make food by using the energy from sunlight to converts carbon dioxide and water into sugar or starch. This process was called photosynthesis. The next stage in the development in plants was 'The Age of Primitive Vascular Plants. This new period (the second stage) in plant history occurred within the next 50 million years (400-500 million years ago). Some of these developed root systems stems and leaves. They also formed woody tissue, which created stiffer stems, which eventually developed into tree trunks. They became tree-like and up to 40 meters tall, forming the world's first forest. 'The Age of Seed Bearing Plants' was the .....