Q: What is the name of the cloud where most long-period comets come from? Choices: - stellar cloud - bulge cloud - volt cloud - oort cloud A:
oort cloud

Q: What is the industrial chemical produced in greatest quantity worldwide? Choices: - gaseous acid - liquid acid - boric acid - sulfuric acid A:
sulfuric acid

Q: Q: What is formed when nitrogen and sulfur oxides dissolve in rain? Choices: - toxic rain - ozone - hail - acid rain A:
A: acid rain

Question: Q: What is the force of attraction between things that have mass Choices: - friction - motion - momentum - gravity A:
Answer: gravity

*Question*
Q: The different types of what systems work together to carry out all the life functions of the individual? Choices: - maturation systems - digestive systems - heartbeat systems - organ systems A:
**Answer**
organ systems

Q: Q: What kind of symmetry do echinoderm larvae have? Choices: - internal - radial - spherical - bilateral A:
A: bilateral