A student is trying to create a table that compares hypotheses, theories, and laws. Hypothesis
Theory
Law
Do scientific researchers formulate it?
Yes
Yes
Yes
Does it explain why things happen?
Yes
Yes
No

Yes
Yes
Yes
Is it used to make predictions?
No
Yes
Yes

Which of the following questions would most likely fill the blank in the table?
Is it an intelligent guess?
Is it newly formulated?
Is it based on observations?
Has it been proved?

In a laboratory experiment, a fermenting aqueous solution of glucose and yeast produces carbon dioxide gas and ethanol. the solution was heated by burning natural gas in a bunsen burner to distill the ethanol that formed in the flask. during the distillation, the ethanol evaporated and then condensed in the receiving flask. the flame of the burner was kept too close to the bottom of the flask and some of the glucose decomposed into a black carbon deposit on the inside of the flask. during this experiment the following changes occurred. which of these changes involved a physical change and not a chemical change? check all that apply. 1-condensation of ethanol 2-evaporation of ethanol 3- formation of carbon dioxide gas from glucose burning of natural gas 4-formation of ethanol from glucose by yeast 5-formation of a carbon deposit inside the flask

Achef makes salad dressing by mixing oil, vinegar, and spices, as shown. which type of matter is the salad dressing?

Write the chemical formula for a compound that is made of an element from group 1 and an element from group 17