Q: Electrons in inner shells are called what? Choices: - inner electrons - surface electrons - valence electrons - core electrons A:
core electrons

Q: What is the basic unit of matter? Choices: - neutrons - calories - ions - atoms A:
atoms

Q: Q: What are the mineral deposits that fill in underground cracks called? Choices: - cores - currents - motherlode - veins A:
A: veins

Question: Q: Why would prokaryotes be chemotrophs instead of phototrophs in a deep-sea hydrothermal vent? Choices: - too cold - too much light - too much heat - lack of light A:
Answer: lack of light

*Question*
Q: Where are about 75% of the tar sands in the world located? Choices: - china and onatrio, canada - alberta, canada and peru - venezuela and onatrio,canada - venezuela and alberta, canada A:
**Answer**
venezuela and alberta, canada

(Q).
Q: What are made in the first step of the scientific method? Choices: - patterns - hypothesis - conclusions - observations A:
(A).
observations