Q: What is the largest mineral group, comprising over 90% of earth's crust? Choices: - oxides - carbonates - soils - silicates A:
silicates

Q: What are two types of frozen percipitation? Choices: - icycles and icebergs - rain and hail - ice and frost - snow and hail A:
snow and hail

Q: Q: What is the source of precipitation? Choices: - pollution - clouds - the sea - the atmosphere A:
A: the atmosphere

Question: Q: Through what do moving particles transfer thermal energy? Choices: - plasma - gas - tissue - fluid A:
Answer: fluid

*Question*
Q: What do muscles need to contract? Choices: - stress - tendons - pressures - stimulus A:
**Answer**
stimulus

Q: What can carry nerve impulses from tissues and organs to the spinal cord and brain? Choices: - healthy neurons - motor neurons - respiratory neurons - sensory neurons A:
sensory neurons