input: OPTIONS:
- developed reaction
- Quick reaction
- toxic reaction
- chemical reaction Now, answer this question: Q: Matter is always conserved in what type of reaction? A:
A:
output: chemical reaction

Q: Neurologists are physicians who specialize in disorders of what system? A:

OPTIONS:
- digestive system
- musculoskeletal system
- circulatory system
- nervous system

Answer: nervous system

Problem: OPTIONS:
- tension
- vibration
- gravity
- friction
Q: Q: What force occurs whenever two surfaces come into contact? A:
Answer: friction

Problem:OPTIONS:
- spontaneous mutation
- variation
- generation
- evolution

Q: The change in the characteristics of living things over time is known as _________ A:
****
A: evolution

Q: The high points of a transverse wave are called what? A:
OPTIONS:
- ridges
- valleys
- points
- crests
crests

Q: Does warm air sit above or below cooler air in the troposphere? A:
OPTIONS:
- above
- adjacent
- near
- below

Answer:
below