Answer the following question given this paragraph: Most pure nitrogen comes from the fractional distillation of liquid air. The atmosphere consists of 78% nitrogen by volume. This means there are more than 20 million tons of nitrogen over every square mile of the earth's surface. Nitrogen is a component of proteins and of the genetic material (DNA/RNA) of all plants and animals. Under ordinary conditions, nitrogen is a colorless, odorless, and tasteless gas. It boils at 77 K and freezes at 63 K. Liquid nitrogen is a useful coolant because it is inexpensive and has a low boiling point. Nitrogen is very unreactive because of the very strong triple bond between the nitrogen atoms. The only common reactions at room temperature occur with lithium to form Li3N, with certain transition metal complexes, and with hydrogen or oxygen in nitrogenfixing bacteria. The general lack of reactivity of nitrogen makes the remarkable ability of some bacteria to synthesize nitrogen compounds using atmospheric nitrogen gas as the source one of the most exciting chemical events on our planet. This process is one type of nitrogen fixation. In this case, nitrogen fixation is the process where organisms convert atmospheric nitrogen into biologically useful chemicals. Nitrogen fixation also occurs when lightning passes through air, causing molecular nitrogen to react with oxygen to form nitrogen oxides, which are then carried down to the soil. Q: What term describes the process where organisms convert atmospheric nitrogen into biologically useful chemicals? A:
OPTIONS:
- carbon cycle
- cellular respiration
- photosynthesis
- nitrogen fixation

Answer: nitrogen fixation

Question: Answer the following question given this paragraph: Electric charge is found only in a conductor. Q: Where is the only place an electric charge can be found? A:
OPTIONS:
- translator
- ion
- neuron
- conductor
Answer: conductor

input with options: Answer the following question given this paragraph: Carbohydrates, proteins, and nucleic acids are large molecules (macromolecules) built from smaller molecules (monomers) through dehydration reactions. In a dehydration reaction, water is removed as two monomers are joined together. Q: In a dehydration reaction, what is removed as two monomers are joined together? A:
OPTIONS:
- carbon
- air
- nitrogen
- water
output: water

Q: Answer the following question given this paragraph: prepared. A student measures the radioactivity of this source with a Geiger counter and observes 1500 counts per minute. She notices that the source was prepared 120 days before her lab. What fraction of the decays is she observing with her apparatus? (b) Identify some of the reasons that only a fraction of the s emitted are observed by the detector. Armor-piercing shells with depleted uranium cores are fired by aircraft at tanks. (The high density of the uranium makes them effective. ) The uranium is called depleted because it has had its 235 U removed for reactor use and is. Q: What 'counting' instrument is used to measure radioactivity? A:

OPTIONS:
- Liquid Counter
- ellie counter
- pryor counter
- geiger counter

A: geiger counter

input: OPTIONS:
- unstable
- aqueous
- saturated
- unsaturated Now, answer this question: Answer the following question given this paragraph: Unsaturated hydrocarbons have at least one double or triple bond between carbon atoms, so the carbon atoms are not bonded to as many hydrogen atoms as possible. In other words, they are unsaturated with hydrogen atoms. Q: When carbon atoms are not bonded to as many hydrogen atoms as possible, what kind of hydrocarbon results? A:
A:
output: unsaturated

Question: Answer the following question given this paragraph: Radiocarbon is useful for relatively young, carbon-based materials. Other longer-lived isotopes are good for older rocks and minerals. Q: Radiocarbon is useful for dating relatively young materials with what element as their base? A:
OPTIONS:
- hydrogen
- oxygen
- nitrogen
- carbon
Answer:
carbon