Answer the following question given this paragraph: Metal exposed to the outside elements will usually corrode if not protected. The corrosion process is a series of redox reactions involving the metal of the sculpture. In some situations, the metals are deliberately left unprotected so that the surface will undergo changes that may enhance the esthetic value of the work. Q: What process typically occurs to metal exposed to outside elements? A:

OPTIONS:
- shrinkage
- extraction
- explosion
- corrosion

Answer: corrosion

Problem: OPTIONS:
- winds
- fossils
- tides
- waves
Q: Answer the following question given this paragraph: Wavelength is one way of measuring the size of waves. It is the distance between two corresponding points on adjacent waves, and it is usually measured in meters. How it is measured is a little different for transverse and longitudinal waves. Q: What do wavelengths measure the size of? A:
Answer: waves

Problem:OPTIONS:
- constantly electron charge
- lean electron charge
- same electron charge
- opposite electron charge

Answer the following question given this paragraph: Electrons are transferred from hair to a balloon rubbed against the hair. Then the oppositely charged hair and balloon attract each other. Q: When a balloon is rubbed against hair, why do they attract each other? A:
****
A: opposite electron charge

Answer the following question given this paragraph: Weather maps show storms, air masses, and fronts. Q: Weather maps show storms, air masses, and what? A:
OPTIONS:
- currents
- patterns
- regions
- fronts
fronts

Answer the following question given this paragraph: The positive sign of the force indicates the force is repulsive. This makes sense, because both objects have a positive charge. Q: When both objects have a positive charge what will the force be between them? A:
OPTIONS:
- attractive
- expressive
- polar
- repulsive

Answer: repulsive

input with options: Answer the following question given this paragraph: Predators play an important role in an ecosystem. For example, if they did not exist, then a single species could become dominant over others. Grazers on a grassland keep grass from growing out of control. Predators can be keystone species . These are species that can have a large effect on the balance of organisms in an ecosystem. For example, if all of the wolves are removed from a population, then the population of deer or rabbits may increase. If there are too many deer, then they may decrease the amount of plants or grasses in the ecosystem. Decreased levels of producers may then have a detrimental effect on the whole ecosystem. In this example, the wolves would be a keystone species. Q: What type of species have a large effect on the balance of organisms in an ecosystem? A:
OPTIONS:
- decomposers
- producers
- secondary consumers
- keystone
output:
keystone