input with options: Answer the following question given this paragraph: Figure 19.24 Coral is the foundation species of coral reef ecosystems. (credit: Jim E. Maragos, USFWS). Q: What is the foundation species of coral reef ecosystems? A:
OPTIONS:
- anemones
- crystals
- molluscs
- coral
output: coral

Q: Answer the following question given this paragraph: Condensation changes water vapor to liquid water. As air rises higher into the atmosphere, it cools. Cool air can hold less water vapor than warm air. So some of the water vapor condenses into water droplets. Water droplets may form clouds. Q: What changes water vapor to liquid water? A:

OPTIONS:
- fermentation
- global warming
- combustion
- condensation

A: condensation

input: OPTIONS:
- momentum
- density
- magnetism
- weight Now, answer this question: Answer the following question given this paragraph: The weight of an object is the force pulling the object downward. On Earth, this would be the gravitational force of the Earth on the object. On the moon, this would be the gravitational force of the moon on the object. The gravitational force of the moon is one-sixth the magnitude of the gravitational force of the Earth; the weight of the moon rock on the moon will be one-sixth the weight of the moon rock on the Earth's surface. Weight is measured in force unitsnewtonsby a calibrated spring scale as shown here. Q: What is the force pulling an object downward called? A:
A:
output: weight

Answer the following question given this paragraph: Electromagnetic waves generally propagate out from a source in all directions, sometimes forming a complex radiation pattern. A linear antenna like this one will not radiate parallel to its length, for example. The wave is shown in one direction from the antenna in Figure 24.7 to illustrate its basic characteristics. Instead of the AC generator, the antenna can also be driven by an AC circuit. In fact, charges radiate whenever they are accelerated. But while a current in a circuit needs a complete path, an antenna has a varying charge distribution forming a standing wave, driven by the AC. The dimensions of the antenna are critical for determining the frequency of the radiated electromagnetic waves. This is a resonant phenomenon and when we tune radios or TV, we vary electrical properties to achieve appropriate resonant conditions in the antenna. Q: A current in a circuit needs a complete what? A:

OPTIONS:
- cause
- speed
- stream
- path

Answer: path

Problem: OPTIONS:
- velocity
- frequency
- diameter
- density
Q: Answer the following question given this paragraph: Density is an expression of the mass of substance in terms of the volume occupied by the substance. Q: What expresses the mass of substance in terms of the volume occupied by the substance? A:
Answer: density

Answer the following question given this paragraph: pH values for several common materials are listed. Q: What can be used to speed up biochemical reactions? A:

OPTIONS:
- proteins
- hormones
- carbohydrates
- enzymes

Answer:
enzymes