Question: Fact 1: Vein deposits of gold and silver are formed by igneous intrusion. Fact 2: Along with gold and silver, they are known as precious or noble metals. Given the two facts above, igneous intrusion causes vein deposits of what?
OPTIONS:
- Sediment
- diamonds
- water
- precious metals
- oil
- Calcium carbonate
- graptolites
- hydrogen and oxygen
Answer: precious metals

Question: Fact 1: Viruses are not cells. Fact 2: Some smallpox viruses are maintained in laboratories. Given the two facts above, what is not a cell?
OPTIONS:
- A computer
- all matter
- smallpox
- an object
- illness
- bacteria
- Most plants
- hydrocarbons
Answer: smallpox

Question: Fact 1: All life relies on a relatively narrow range of pH, or acidity. Fact 2: Life during most of the Precambrian was restricted to bacteria and algae. Given the two facts above, bacteria relies on a relatively narrow range of what?
OPTIONS:
- RNA
- Fe
- 12
- DDT
- DNA
- pH
- CO2
- O2
Answer:
pH