input: OPTIONS:
- territorial molecules sticking together
- molecules create a thin film-like substance
- electric impulses in atoms
- polar molecules sticking together Now, answer this question: Answer the following question given this paragraph: Water has remarkable properties. Water expands when it freezes, even though all other substances contract. This means that in the winter ice on a pond or lake will float. Water has high surface tension because polar molecules tend to stick together. That's why drops stick together or some bugs can walk on the surface of a pond. Without water, life might not be able to exist on Earth. If it did exist, it would not be as diverse or as complex. Q: What can water's high surface tension be attributed t? A:
A:
output: polar molecules sticking together

Answer the following question given this paragraph: Q: What causes natural ripening in fruit? A:

OPTIONS:
- sulfur
- chloride
- acid
- ethylene

Answer: ethylene

Problem: OPTIONS:
- it absorbs light
- it isn't washable
- it is magnetic
- it conducts heat
Q: Answer the following question given this paragraph: This teakettle is made of aluminum except for its handle, which is made of plastic. Aluminum is a good conductor of heat. It conducts heat from the flames on the range to the water inside the kettle, so the water heats quickly. Plastic, on the other hand, is not a good conductor of heat. It stays cool enough to touch even when the rest of the teakettle becomes very hot. Q: Why wouldn't a teakettle have an aluminum handle? A:
Answer: it conducts heat

Problem:OPTIONS:
- direction
- change in direction
- mass per unit
- distance over time in a given direction

Answer the following question given this paragraph: Figure 28.14 Classically, velocities add like ordinary numbers in one-dimensional motion. Here the girl throws a snowball forward and then backward from a sled. The velocity of the sled relative to the Earth is relative to the Earth is. Q: What determines velocity? A:
****
A: distance over time in a given direction

Answer the following question given this paragraph: Q: Plants produce their own sugars and other food molecules through what process? A:
OPTIONS:
- hydrogenesis
- spermatogenesis
- glycolysis
- photosynthesis
photosynthesis

Answer the following question given this paragraph: A population can't keep growing bigger and bigger forever. Sooner or later, it will run out of things it needs. For a given species, there is a maximum population that can be supported by the environment. This maximum is called the carrying capacity . When a population gets close to the carrying capacity, it usually grows more slowly ( Figure below ). When the population reaches the carrying capacity, it stops growing. Q: For any given species, what term means the maximum population that can be supported by the environment? A:
OPTIONS:
- zero population growth
- mass extinction
- tipping point
- carrying capacity

Answer:
carrying capacity