Q: Answer the following question given this paragraph: Altitude is height above sea level. The density of air decreases with height. There are two reasons. At higher altitudes, there is less air pushing down from above. Also, gravity is weaker farther from Earth's center. So at higher altitudes, air molecules can spread out more. Air density decreases. You can see this in Figure below . Q: Altitude is height above what? A:

OPTIONS:
- the earth's core
- the earth's surface
- the water table
- sea level

A: sea level

input: OPTIONS:
- substructure
- history
- iteration
- phylogeny Now, answer this question: Answer the following question given this paragraph: Phylogeny is the evolutionary history of group of related organisms. It is represented by a phylogenetic tree that shows how species are related to each other through common ancestors. Q: What is the evolutionary history of group of related organisms A:
A:
output: phylogeny

Answer the following question given this paragraph: Gas pressure is the result of collisions between gas particles and an object. Q: What two things collide to cause gas pressure? A:

OPTIONS:
- gas particles and an electron
- light particles and an object
- gas particles and a wave
- gas particles and an object

Answer: gas particles and an object

Problem: OPTIONS:
- gas
- mercury
- coal
- magma
Q: Answer the following question given this paragraph: During a massive eruption, all of the material may be ejected from a magma changer. Without support, the mountain above the empty chamber may collapse. This produces a huge caldera . Calderas are generally round, bowl-shaped formations ( Figure below ). Q: Huge calderas form when the mountain above an empty chamber of what collapses? A:
Answer: magma

Problem:OPTIONS:
- physical sciences
- earth sciences
- social sciences
- life sciences

Answer the following question given this paragraph: The life sciences are the study of living organisms. They deal with every aspect of living organisms, from the biology of cells , to the biology of individual organisms, to how these organisms interact with other organisms and their environment. Q: What sciences are the study of living organisms? A:
****
A: life sciences

Problem:OPTIONS:
- light
- food
- hydrogen
- energy

Answer the following question given this paragraph: Einstein's equation helps scientists understand what happens in nuclear reactions and why they produce so much energy. When the nucleus of a radioisotope undergoes fission or fusion in a nuclear reaction, it loses a tiny amount of mass. What happens to the lost mass? It isn't really lost at all. It is converted to energy. How much energy? E = mc 2 . The change in mass is tiny, but it results in a great deal of energy. Q: Einstein's equation helps scientists understand what happens in nuclear reactions and why they produce so much what? A:
****
A:
energy