Q: The environment where most chemical reactions in organisms takes place consists mostly of what? Choices: - air - sodium - helium - water A:
water

Q: Scientists around the world study speciation, documenting observations both of living organisms and those found in the fossil record. as their ideas take shape and as research reveals new details about how life evolves, they develop models to help explain what? Choices: - spontaneous mutation - creation theory - food chains - rates of speciation A:
rates of speciation

Q: Q: On a topographic map, what is the term for a line of equal elevation? Choices: - latitude line - crater line - aurora line - contour line A:
A: contour line

Question: Q: What is the radula made mostly of? Choices: - casein - chlorophyll - schist - chitin A:
Answer: chitin

*Question*
Q: What is the process of oxidized iron that has been exposed to air and water? Choices: - bark - crust - crystallization - rust A:
**Answer**
rust

*Question*
Q: What are diodes, transistors, and integrated circuits examples of? Choices: - computer parts - radio parts - machine parts - electronic components A:
**Answer**
electronic components