question: Write a question you would see in a school textbook. OPTIONS:
- Gravitational forces result in the fusion of small atoms.
- A differentiated iron core expresses magnetic properties.
- Currents redistribute heat in an unevenly heated liquid.
- A stream of charged ions disperses lightweight gases.
answer: Which of the following is a crucial piece of evidence supporting scientists' theory of how the continents and the ocean basins formed?

question: Write a question you would see in a school textbook. OPTIONS:
- intrusive igneous
- extrusive igneous
- clastic sedimentary
- organic sedimentary
answer: Florida has a large supply of phosphate that ancient seas deposited millions of years ago. The phosphate contains the remains of animals that were deposited in layers on the sea floor. Which type of rock did the phosphate become?

question: Write a question you would see in a school textbook. OPTIONS:
- runoff
- evaporation
- precipitation
- transpiration
answer:
Increased nutrient levels in lakes can cause ecological changes that result in the death of many fish. At what point in the hydrological cycle are most nutrients deposited into lakes?