Open QuestionA piece of limestone erodes due to acid rain. this process can be best described as a377views
Open QuestionAcid rain hits a statue. Over time holes are formed in the statue. This is an example of489views
Open QuestionIf two substances are mixed and a new substance is formed, what type of change is it?825views
Open QuestionWhich of the following is an indication that a substance has undergone a chemical change?508views
Open QuestionWhich of the following is an indication that a substance has undergone a chemical change?473views