*Question*
Q: What compound has positive and negative ions? Choices: - hydrocarbon - protein - covalent - ionic A:
**Answer**
ionic

*Question*
Q: What is the second stage of cellular respiration? Choices: - beatnik cycle - duocycle - marr cycle - krebs cycle A:
**Answer**
krebs cycle

*Question*
Q: Which element has an atomic number of 16? Choices: - acid - methane - oxygen - sulfur A:
**Answer**
sulfur

*Question*
Q: In which state does matter need to be for nuclear fusion? Choices: - cells state - solid state - gaseous state - plasma state A:
**Answer**
plasma state