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Earth science big bang study guide Students will know the following: • Identify various lab equipment and their uses (beaker, flask, graduated cylinder, lab stand, etc.) • Lab safety rules • Steps of the scientific method • How to convert in the metric system • How to run a valid experiment • Definitions of independent variable, dependent variable, control, and constant • How to identify variables in an experiment • How the universe was formed and how long ago • Evidence that supports the big bang • The difference between a theory and a law • What is a galaxy • Facts about the milky way galaxy • Where our solar system is located in the milky way galaxy • How astronomers study galaxies • How astronomers classify galaxies • Difference between geocentric and heliocentric model • The famous scientists who contributed to our current understanding of the heliocentric model of the solar system