PICAT Study Guide Q&A 100% Verified Correct 2023 Solution

PICAT Study Guide Q&A 100% Verified Correct 2023 Solution Which of these is the best explanation of how a smooth round stone became smooth? - CORRECT ANS -It was in a stream for a long time. In a balanced aquatic ecosystem, what would have the greatest population? - CORRECT ANS -Plankton Any astronomical body that revolves around a larger body is called - CORRECT ANS -A satellite In chemistry, to be classified as an organic substance, a substance must contain - CORRECT ANS -Carbon atoms What element does not contain any neutrons? - CORRECT ANS -Hydrogen The chemical formula of a compound describes the elements the compound contains and the ...... - CORRECT ANS -Ratio of elements in the compound. What is the symbol for the hydroxyl ion? - CORRECT ANS -OH- The tympanic membranes are also known as the... - CORRECT ANS -Ear drums What would produce a chemical change? - CORRECT ANS -Adding salt to the hot water Choking is prevented by the.... - CORRECT ANS -Epiglottis covering the voice box What do a hydrogen molecule and an oxygen molecule have in common? - CORRECT ANS -the size What is non-renewable resource? - CORRECT ANS -copper