Q: Many processes on Earth occur at or near tectonic plate boundaries. Which geological events are most common along tectonic plate boundaries?

OPTIONS:
- erosion and deposition
- hurricanes and tornadoes
- earthquakes and volcanoes
- tidal waves and sedimentation
A: earthquakes and volcanoes
Q: Iron oxides, such as rust, form when iron metal reacts with oxygen in the air. What are the chemical symbols for the two elements found in iron oxide?

OPTIONS:
- I and O
- Ir and O
- Fe and O
- Pb and O
A: Fe and O
Q: Genes are located on chromosomes which are composed of

OPTIONS:
- DNA.
- RNA.
- ATP.
- ADP.
A: DNA.
Q: Biologists have discovered that the beluga whales of Canada's St. Lawrence River have the highest rates of cancer among animals. What is most likely the reason for this high incidence of cancer in these whales?

OPTIONS:
- chemical and pollutant runoff into the ocean
- average temperatures increased in the region
- depletion of natural prey from the ecosystem
- increased levels of carbon dioxide in the atmosphere
A:
chemical and pollutant runoff into the ocean