1. Identify the flaw in the way Maria set up her experiment.
A. She did not take pictures.
B. She did not wait long enough.
C. She did not measure the temperature.
D. She did not mix the substances well enough.
2. Which of the following describes Maria making an observation?
A. Maria measured the compounds.
B. Maria let the test tube sit for one minute.
C. Maria wrote her results in her lab notebook.
D. Maria saw that bubbles formed on the metal in in mixture.