input with options: Answer the following question given this paragraph: The stratosphere is the layer above the troposphere. The layer rises to about 50 kilometers (31 miles) above the surface. Q: What is the layer above the troposphere? A:
OPTIONS:
- sediment
- condensation
- earth
- stratosphere
output: stratosphere

Q: Answer the following question given this paragraph: In the study of thermochemical processes, things are viewed from the point of view of the system. A chemical reaction or physical change is endothermic if heat is absorbed by the system from the surroundings. In the course of an endothermic process, the system gains heat from the surroundings and so the temperature of the surroundings decreases. The quantity of heat for a process is represented by the letter . The sign of for an endothermic process is positive because the system is gaining heat. A chemical reaction or physical change is exothermic if heat is released by the system into the surroundings. Because the surroundings is gaining heat from the system, the temperature of the surroundings increases. The sign of for an exothermic process is negative because the system is losing heat. Q: If heat is released by the system into the surroundings, a chemical reaction or physical change is called what? A:

OPTIONS:
- static
- endothermic
- biochemical
- exothermic

A: exothermic

input: OPTIONS:
- weight
- size
- precipitation
- temperature Now, answer this question: Answer the following question given this paragraph: Q: Each enzyme has an optimal what at which its reaction rate is greatest? A:
A:
output: temperature

Answer the following question given this paragraph: Other applications of carbonates include glass makingwhere carbonate ions serve as a source of oxide ionsand synthesis of oxides. Hydrogen carbonates are amphoteric because they act as both weak acids and weak bases. Hydrogen carbonate ions act as acids and react with solutions of soluble hydroxides to form a carbonate and water: KHCO 3(aq) + KOH(aq) K 2 CO 3(aq) + H 2 O(l) With acids, hydrogen carbonates form a salt, carbon dioxide, and water. Baking soda (bicarbonate of soda or sodium bicarbonate) is sodium hydrogen carbonate. Baking powder contains baking soda and a solid acid such as potassium hydrogen tartrate (cream of tartar), KHC4H4O6. As long as the powder is dry, no reaction occurs; immediately after the addition of water, the acid reacts with the hydrogen carbonate ions to form carbon dioxide: HC 4 H 4 O 6 (aq) + HCO 3 (aq) C 4 H 4 O 6 2(aq) + CO 2(g) + H 2 O(l) Dough will trap the carbon dioxide, causing it to expand during baking, producing the characteristic texture of baked goods. Q: Substances that act as both weak acids and bases are said to be what? A:

OPTIONS:
- amphiphilic
- hygroscopic
- atmospheric
- amphoteric

Answer: amphoteric

Problem: OPTIONS:
- velocity
- fluid
- accelerating
- projectile
Q: Answer the following question given this paragraph: Examples of objects that have projectile motion include arrows and cannon balls. Q: Arrows and cannon balls are examples of objects with what kind of motion? A:
Answer: projectile

Answer the following question given this paragraph: Nebulae can be spotted with the naked eye or simple telescopes. Q: What is one method to observe nebulae? A:

OPTIONS:
- mirror
- kaleidoscope
- microscope
- telescope

Answer:
telescope