Explore the law of conservation of mass. model a physical or chemical change, and then demonstrate how mass is conserved before and after the change. the image shows how the total number of atoms before and after a chemical reaction equals one another two purple circles plus two red circles to make a new substance with two molecules each made up of one red circle attached to one purple circle
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Which of the following elements is in the same period as phosphorus? a. carbon c. nitrogen b. magnesium d. oxygen select the best answer from the choices provided a b c d
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Time remainin52: 42the chart shows data for a moving object.which conclusion is best supported by the information inthe chart? time (s)velocity (m/s
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Current from a charged capacitor lights a bulb. as time goes on the brightness of the
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Complete the sentence to describe the law of conservation of energy. the law of conservation of energy states that energy cannot be created
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Explore the law of conservation of mass. model a physical or chemical change, and then demonstrate h...
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