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As these changes have occurred, organisms have evolved, and remnants of some have been preserved as fossils.A fossil can be studied to determine what kind of organism it represents, how the organism lived, and how it was preserved.Congratulations to everyone who joined the challenge and shared their creation! Have you and your kids ever cracked open a geode to reveal the crystals inside?This is a great way to add something special to a prized rock collection and can be a lot of fun for kids who are interested in geology, rocks, or crystals.Complex dating problems often use a variety of techniques and information to arrive at the best answer.

Working out how old archaeological remains are is a vital part of archaeology.Mountains have been built and eroded, continents and oceans have moved great distances, and the Earth has fluctuated from being extremely cold and almost completely covered with ice to being very warm and ice-free.These changes typically occur so slowly that they are barely detectable over the span of a human life, yet even at this instant, the Earth's surface is moving and changing.To determine the year age (absolute age) of an object, a number of chemical and radioactive techniques can be used.Four main methods have been used in Willandra archaeology.Below is a list of the 1157 science fair project ideas on our site.To help you find a topic that can hold your interest, Science Buddies has also developed the Topic Selection Wizard.In movies like Dolphin Tale, you don't have to look far to find the engineering design process in action.With the steps of the engineering process being acted out as the story unfolds, students see that success often involves a great deal of trial, error, testing, and redesigning.This applies the geological principle that under normal circumstances younger layers of sediment will be deposited on top of older layers.This 'law of superimposition' works in the well-defined layers of the Willandra lunettes, but only dates objects as younger or older than adjacent layers.