Problem: OPTIONS:
- predators
- precipitation
- UV light
- extreme heat
Q: Answer the following question given this paragraph: Q: Lodgepole cones remain closed until exposed to what? A:
Answer: extreme heat

Problem:OPTIONS:
- in the afternoon
- all day
- in the morning
- at night

Answer the following question given this paragraph: Q: When is melatonin secreted? A:
****
A: at night

Answer the following question given this paragraph: Large ocean currents can have a big impact on the climate of nearby coasts. The Gulf Stream, for example, carries warm water from near the equator up the eastern coast of North America. Look at the map in Figure below . It shows how the Gulf Stream warms both the water and land along the coast. Q: Which factor has a big impact on coastal climates? A:
OPTIONS:
- ocean waves
- tsunami
- tide
- large ocean currents
large ocean currents

Answer the following question given this paragraph: Molten Salts and Ionic Liquids Heating a salt to its melting point produces a molten salt. If we heated a sample of solid NaCl to its melting point of 801C, for example, it would melt to give a stable liquid that conducts electricity. The characteristics of molten salts other than electrical conductivity are their high heat capacity, ability to attain very high temperatures (over 700C) as a liquid, and utility as solvents because of their relatively low toxicity. Molten salts have many uses in industry and the laboratory. For example, in solar power towers in the desert of California, mirrors collect and focus sunlight to melt a mixture of sodium nitrite and sodium nitrate. The heat stored in the molten salt is used to produce steam that drives a steam turbine and a generator, thereby producing electricity from the sun for southern California. Due to their low toxicity and high thermal efficiency, molten salts have also been used in nuclear reactors to enable operation at temperatures greater than 750C. One prototype reactor tested in the 1950s used a fuel and a coolant consisting of molten fluoride salts, including NaF, ZrF 4, and UF4. Molten salts are also. Q: Ionic liquids heating a salt to its melting point produces a what? A:
OPTIONS:
- table salt
- plasma
- gas
- molten salt

Answer: molten salt

Question: Answer the following question given this paragraph: Heterotrophic organisms use organic compounds, usually from other organisms, as carbon sources. Q: Heterotrophic organisms use organic compounds, usually from other organisms, as a source of what basic element of life? A:
OPTIONS:
- oxygen
- monoxide
- hydrogen
- carbon
Answer: carbon

input: OPTIONS:
- biochemistry
- chemistry
- biology
- stratigraphy Now, answer this question: Answer the following question given this paragraph: The study of rock strata is called stratigraphy . The laws of stratigraphy can help scientists understand Earth's past. The laws of stratigraphy are usually credited to a geologist from Denmark named Nicolas Steno. He lived in the 1600s. The laws are illustrated in the Figure below ; refer to the figure as you read about Steno's laws below. Q: What is the study of rock strata called? A:
A:
output:
stratigraphy