Q: What is the term for a pure substance that possesses unique properties and cannot be broken down into other substances? Choices: - alloy - plastic - light - element A:
element

Q: The ostwald process is the commercial method for producing what? Choices: - citric acid - deoxyribonucleic acid - chlorine - nitric acid A:
nitric acid

Q: Q: What carries small pollen grains farther than they otherwise would go? Choices: - humidity - steam - birds - wind A:
A: wind

Question: Q: Stringed instruments can help show the relationship between tension and what in strings? Choices: - volumes - temperatures - lengths - frequencies A:
Answer: frequencies

*Question*
Q: What do you call different organs working together? Choices: - cellular system - endocrine system - maturation systems - organ systems A:
**Answer**
organ systems

*Question*
Q: What have a symbiotic relationship between a fungus and a photosynthetic organism? Choices: - crustaceans - amphibians - sponges - lichens A:
**Answer**
lichens