Answer the following question given this paragraph: The major cause of outdoor air pollution is the burning of fossil fuels. Fossil fuels are burned in power plants, factories, motor vehicles, and home heating systems. Ranching and using chemicals such as fertilizers also cause outdoor air pollution. Erosion of soil in farm fields, mining activities, and construction sites adds dust particles to the air as well. Some specific outdoor air pollutants are described in Table below . Q: What is the major cause of outdoor air pollution? A:
OPTIONS:
- electric lines
- agricultural equipment
- manufacturing industry
- burning fossil fuels

Answer: burning fossil fuels

Question: Answer the following question given this paragraph: Nuclear fission is the splitting of the nucleus of an atom into two smaller nuclei. This type of reaction releases a great deal of energy from a very small amount of matter. It begins when the nucleus of a radioactive atom gains a neutron. Q: What term describes the splitting of the nucleus of an atom into two smaller nuclei? A:
OPTIONS:
- nuclean fusion
- atomic reaction
- critical fission
- nuclear fission
Answer: nuclear fission

input with options: Answer the following question given this paragraph: Absorption of Light Light energy enters the process of photosynthesis when pigments absorb the light. In plants, pigment molecules absorb only visible light for photosynthesis. The visible light seen by humans as white light actually exists in a rainbow of colors. Certain objects, such as a prism or a drop of water, disperse white light to reveal these colors to the human eye. The visible light portion of the electromagnetic spectrum is perceived by the human eye as a rainbow of colors, with violet and blue having shorter wavelengths and, therefore, higher energy. At the other end of the spectrum toward red, the wavelengths are longer and have lower energy. Q: In plants, pigment molecules absorb only visible light for photosynthesis. the visible light seen by humans as white light actually exists in a what? A:
OPTIONS:
- vacuum
- transparency
- invisible spectrum
- rainbow of colors
output: rainbow of colors

Q: Answer the following question given this paragraph: Ionic compounds are compounds in which positive metal ions and negative nonmetal ions are joined by ionic bonds. In these compounds, the chemical symbol for the positive metal ion is written first, followed by the symbol for the negative nonmetal ion. The video at the following URL gives a fuller explanation of ionic compounds and their formulas: http://www. youtube. com/watch?v=vscoYh6m46M . Q: The chemical symbol of which ion is written first in ionic compounds? A:

OPTIONS:
- negative ion
- good metal ion
- last ion
- positive metal ion

A: positive metal ion

input: OPTIONS:
- kinetic energy
- chemical energy
- visible energy
- thermal energy Now, answer this question: Answer the following question given this paragraph: Most circuits have devices such as light bulbs that convert electrical energy to other forms of energy. In the case of a light bulb, electrical energy is converted to light and thermal energy. Q: A light bulb converts electrical energy to light and what? A:
A:
output: thermal energy

Question: Answer the following question given this paragraph: The Phosphorus Cycle Phosphorus is an essential nutrient for living processes; it is a major component of nucleic acids and phospholipids, and, as calcium phosphate, makes up the supportive components of our bones. Phosphorus is often the limiting nutrient (necessary for growth) in aquatic, particularly freshwater, ecosystems. Phosphorus occurs in nature as the phosphate ion (PO43-). In addition to phosphate runoff as a result of human activity, natural surface runoff occurs when it is leached from phosphate-containing rock by weathering, thus sending phosphates into rivers, lakes, and the ocean. This rock has its origins in the ocean. Phosphate-containing ocean sediments form primarily from the bodies of ocean organisms and from their excretions. However, volcanic ash, aerosols, and mineral dust may also be significant phosphate sources. This sediment then is moved to land over geologic time by the uplifting of Earth's surface. (Figure 20.13) Phosphorus is also reciprocally exchanged between phosphate dissolved in the ocean and marine organisms. The movement of phosphate from the ocean to the land and through the soil is extremely slow, with the average phosphate ion having an oceanic residence time between 20,000 and 100,000 years. Q: Phosphate-containing ocean sediments form primarily from the bodies of ocean organisms and from their what? A:
OPTIONS:
- ancestors
- skeletons
- blood
- excretions
Answer:
excretions