Hallie takes notes in class as shown below.

Developed through making observations
About the natural world
Observation → question → hypothesis → experiment

Which would be the best title for her notes?

Scientific Knowledge
Experimentation
Characteristics of Science
Limitations of Science

Which statement about hf is true? it is zero for any compound in its standard state. it is positive when the bonds of the product store more energy than those of the reactants. it is negative when a compound forms from elements in their standard states. it is zero for any element that is in the liquid state.