Answer the following question given this paragraph: At the top of the troposphere is a thin layer of air called the tropopause. You can see it in Figure above . This layer acts as a barrier. It prevents cool air in the troposphere from mixing with warm air in the stratosphere. Q: What thin layer of air acts as a barrier to prevent cool air from mixing with warm air in the stratosphere? A:
OPTIONS:
- methosphere
- endosphere
- liposphere
- tropopause
tropopause

Answer the following question given this paragraph: Scientists refer to the vertical extent of ocean water as the water column . Two main zones based on depth of water are the photic zone and aphotic zone. The photic zone is the top 200 meters of water. The aphotic zone is water deeper than 200 meters. The deeper you go, the darker the water gets. That's because sunlight cannot penetrate very far under water. Sunlight is needed for photosynthesis. So the depth of water determines whether photosynthesis is possible. There is enough sunlight for photosynthesis only in the photic zone. Q: What is the vertical extent of ocean water called? A:
OPTIONS:
- oceanic pillar
- ocean column
- water row
- water column

Answer: water column

Question: Answer the following question given this paragraph: Conversion of Temperature Units We use the word temperature to refer to the hotness or coldness of a substance. One way we measure a change in temperature is to use the fact that most substances expand when their temperature increases and contract when their temperature decreases. The mercury or alcohol in a common glass thermometer changes its volume as the temperature changes. Because the volume of the liquid changes more than the volume of the glass, we can see the liquid expand when it gets warmer and contract when it gets cooler. To mark a scale on a thermometer, we need a set of reference values: Two of the most commonly used are the freezing and boiling temperatures of water at a specified atmospheric pressure. On the Celsius scale, 0 C is defined as the freezing temperature of water and 100 C as the boiling temperature of water. The space between the two temperatures is divided into 100 equal intervals, which we call degrees. On the Fahrenheit scale, the freezing point of water is defined as 32 F and the boiling temperature as 212 F. The space between these two points on a Fahrenheit thermometer is divided into 180 equal parts (degrees). Defining the Celsius and Fahrenheit temperature scales as described in the previous paragraph results in a slightly more complex relationship between temperature values on these two scales than for different units of measure for other properties. Most measurement units for a given property are directly proportional to one another (y = mx). Using familiar length units as one example: length in feet = 1 ft length in inches 12 in. Q: The mercury or alcohol in a common glass what changes its volume as the temperature changes? A:
OPTIONS:
- calculator
- compass
- barometer
- thermometer
Answer: thermometer

input with options: Answer the following question given this paragraph: An oxygen molecule has two nonpolar bonds. This is called a double bond. The two oxygen atoms attract equally the four shared electrons. Q: How many nonpolar bonds does an oxygen molecule have? A:
OPTIONS:
- 5
- 7
- 3
- 2
output: 2

Q: Answer the following question given this paragraph: Carbohydrates are biochemical compounds that include sugars, starches, and cellulose. They contain carbon, hydrogen, and oxygen, and they are used mainly for energy by living things. Q: Biochemical compounds that include sugars, starches, and cellulose are examples of what? A:

OPTIONS:
- electrolytes
- lipids
- proteins
- carbohydrates

A: carbohydrates

Answer the following question given this paragraph: Polyamides Just as the reaction of a diol and a diacid forms a polyester (Section 15.8 "Preparation of Esters"), the reaction of a diacid and a diamine yields a polyamide. The two difunctional monomers often employed are adipic acid and 1,6-hexanediamine. The monomers condense by splitting out water to form a new product, which is still difunctional and thus can react further to yield a polyamide polymer. Q: Just as the reaction of a diol and a diacid forms a polyester, the reaction of a diacid and a diamine yields this? A:
OPTIONS:
- phenol
- polyethylene
- acetone
- polyamide
polyamide