PICAT study guide Test (120 Questions Answered 100%

PICAT study guide Test (120 Questions Answered 100% Which of these is the best explanation of how a smooth round stone became smooth? [Ans:- It was in a stream for a long time. In a balanced aquatic ecosystem, what would have the greatest population? [Ans:- Plankton Any astronomical body that revolves around a larger body is called [Ans:- A satellite In chemistry, to be classified as an organic substance, a substance must contain [Ans:- Carbon atoms what element does not contain any neutrons? [Ans:- Hydrogen The chemical formula of a compound describes the elements the compound contains and the ...... [Ans:- Ratio of elements in the compound. What is the symbol for the hydroxyl ion? [Ans:- OH- The tympanic membranes are also know as the... [Ans:- Ear drums what would produce a chemical change? [Ans:- Adding salt to the hot water Choking is prevented by the.... [Ans:- Epiglottis covering the voice box What do a hydrogen molecule and an oxygen molecule have in common? [Ans:- the size What is non-renewable resource? [Ans:- copper What are the 2 main gases that make up stars? [Ans:- hydrogen and helium