*Question*
Q: What are identified by the azimuthal quantum number? Choices: - ionic-energy level - covalent bonds - radioactivity - energy levels - sub-energy levels A:
**Answer**
sub-energy levels

*Question*
Q: What part of the rainforest commonly has ferns and other ground plants? Choices: - forest floor - canopy layer - emergent layer - understory A:
**Answer**
understory

*Question*
Q: What is the diffusion of water known as? Choices: - evaporation - electrolysis - hemostasis - osmosis A:
**Answer**
osmosis

*Question*
Q: Why must values of specific heat be looked up in tables? Choices: - lack of formulas - difficult to memorize - difficult to understand - difficult to calculate A:
**Answer**
difficult to calculate