PICAT study guide Exam Questions & Answers 100% Correct
Which of these is the best explanation of how a smooth round stone became smooth? - ANSWER-It was in a stream for a long time. In a balanced aquatic ecosystem, what would have the greatest population? - ANSWER-Plankton Any astronomical body that revolves around a larger body is called - ANSWER-A satellite In chemistry, to be classified as an organic substance, a substance must contain - ANSWER-Carbon atoms what element does not contain any neutrons? - ANSWER-Hydrogen The chemical formula of a compound describes the elements the compound contains and the ...... - ANSWER-Ratio of elements in the compound. What is the symbol for the hydroxyl ion? - ANSWER-OH- The tympanic membranes are also know as the... - ANSWER-Ear drums what would produce a chemical change? - ANSWER-Adding salt to the hot water Choking is prevented by the.... - ANSWER-Epiglottis covering the voice box What do a hydrogen molecule and an oxygen molecule have in common? - ANSWER-the size
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