Q: The attraction between all objects in the universe is known as ______. Choices: - variation - electricity - magnetism - gravity A:
gravity

Q: Which type of tree loses its leaves each fall and remains leafless in the winter? Choices: - perennial - conifer - annual - deciduous A:
deciduous

Q: Q: What must two nuclei do for fusion to occur? Choices: - explode - melt - repel each other - collide A:
A: collide

Question: Q: Where do streams often start? Choices: - valleys - oceans - plains - mountains A:
Answer: mountains

*Question*
Q: What two cycles make up the female reproductive cycle? Choices: - ovarian and cesarean - cervical and menstrual - digestive and menstrual - ovarian and menstrual A:
**Answer**
ovarian and menstrual

Q: Q: What is the process in which many new species evolve in a short period of time to fill available niches called? Choices: - adaptation - learned behavior - spontaneous mutation - adaptive radiation A:
A: adaptive radiation