There is an acid that smells like sweaty socks. When alcohol is added to it and the mixture is heated, no change is visible, but a new odor of sweet apples fills the
room. Which of the following is the best explanation for this observation?
A. a chemical change has taken place and no new substance was produced.
B. a physical change has taken place and no new substance was produced.
C. a chemical change has taken place and a new substance was produced.
D. a physical change has taken place and a new substance was produced

Astudent completed a lab report. which correctly describes the difference between the "question" and "hypothesis' sections of her report? "question states what she is asking, and "hypothesis" states the result of her experiment "question" states what she is asking, and "hypothesis" states what she thinks the answer to that question is in 'if. then because" format. "question" describes what she is trying to find out, and "hypothesis" states the procedures and methods of data collection. "question" describes what she is trying to find out, and "hypothesis" states any additional information or prior knowledge about the question

After a group of researchers conducts a new experiment that has never been conducted before, what is the best way for other scientists to make sure that the data is real

Which if the following best describes why invertebrates isn’t considered a scientifically valid word when classifying animals