Q: What is the term for matter that does not let any light pass through? Choices: - dark - mirrored - reflective - opaque A:
opaque

Q: Evolutionary adaptation is evidenced by different shapes of what structures in birds with different food preferences? Choices: - claws - Stomach - necks - beaks A:
beaks

Q: Q: What are the two types of charges? Choices: - ions and neutrons - energy and mass - volume and acceleration - positive and negative A:
A: positive and negative

Question: Q: Minerals that are not pure elements are made of what? Choices: - isotopes - noble gases - metalloids - chemical compounds A:
Answer: chemical compounds

*Question*
Q: A substance that displays different colors when in the presence of an acid or a base is called what? Choices: - pH scale - reactor - litmus test - an acid-base indicator A:
**Answer**
an acid-base indicator

Q: If two chlorine atoms share their unpaired electrons by making a covalent bond and forming cl2, they can each complete their what? Choices: - hypothesized shell - radiative shell - electron shell - valence shell A:
valence shell