Q: What are the two types of earth crust? Choices: - reflective and continental - micro and continental - amorphous and continental - oceanic and continental A:
oceanic and continental

Q: Which kind of mutations have the most dramatic effect on proteins? Choices: - arbitrary mutations - sight mutations - cancerous mutations - nonsense mutations A:
nonsense mutations

Q: Q: What term did schrodinger use for regions around the nucleus where electrons are most likely to be? Choices: - arrays - isotopes - ellipses - orbitals A:
A: orbitals

Question: Q: What type of change has occurred when a copper penny changes color? Choices: - contamination change - carbon change - reactive change - chemical change A:
Answer: chemical change

*Question*
Q: Each proton has how many units of positive charge? Choices: - three - zero - two - one A:
**Answer**
one

Q: Q: An atom is the smallest unit of what that maintains the identity of the latter? Choices: - mixture - organism - cell - element A:
A: element