Q: If an atom gains electrons, it becomes what? Choices: - anion - a cation - neutral - an ion A:
an ion

Q: The planet neptune has strange dark spots that sometimes appear on its surface? what are these spots? Choices: - seas - earthquakes - black holes - storms A:
storms

Q: Q: What is the name of a tough, fibrous membrane which protects the outer layer of bone? Choices: - cartilage - marrow - the epithelium - the periosteum A:
A: the periosteum

Question: Q: What term describes the number and kinds of species in a location or on the planet? Choices: - habitat - Allopatric speciation - ecosystem - biodiversity A:
Answer: biodiversity

*Question*
Q: Nearly how many millions of people die yearly due to air pollution? Choices: - two million - fifty million - eight million - five million A:
**Answer**
five million

*Question*
Q: Structures like the human tail bone and whale pelvis are called what? Choices: - primordial structures - parasitic structures - adaptations - vestigial structures A:
**Answer**
vestigial structures