Q: Answer the following question given this paragraph: Life on Earth is based on carbon. A possible explanation is that no other element in the periodic table forms compounds that are so diverse in their chemistry and physical properties. Discuss the chemistry of carbon with regard to. Q: What element on the periodic table forms the most diverse compounds? A:

OPTIONS:
- helium
- oxygen
- hydrogen
- carbon

A: carbon

Q: Answer the following question given this paragraph: Other methods of surface mining include strip mining, placer mining, and dredging. Strip mining is like open pit mining but with material removed along a strip. A quarry is a type of open-pit mine that produces rocks and minerals that are used to make buildings and roads. Q: What is the type of mining called when materials are removed along a strip? A:

OPTIONS:
- surface mining
- edge mining
- pit mining
- strip mining

A: strip mining

Q: Answer the following question given this paragraph: Many species have a feeding structure, the radula , found only in mollusks. The radula can be thought of as a "tongue-like" structure. The radula is made mostly of chitin. Types of radulae range from structures used to scrape algae off of rocks to the beaks of squid and octopuses. Q: What is the radula made mostly of? A:

OPTIONS:
- casein
- chlorophyll
- schist
- chitin

A: chitin

Q: Answer the following question given this paragraph: Scientists did not actually see viruses for the first time until the 1930s. That's when the electron microscope was invented. In 1915, English bacteriologist Frederick Twort discovered bacteriophage , the viruses that attack bacteria. He noticed tiny clear spots within bacterial colonies, and hypothesized that something was killing the bacteria. The tobacco mosaic virus shown in Figure below was the first one to be seen. Q: The invention of what instrument in the 1930s allowed scientists to see viruses for the first time? A:

OPTIONS:
- spy glass
- telescopes
- magnifying glass
- electron microscope

A:
electron microscope