Answer the following question given this paragraph: Ion drives have low thrust but high efficiency. They have already been used on several space missions, including NASA's Deep Space 1spacecraft and Japan'sHayabusa asteroid sampling probe. Source: Photo courtesy of NASA,http://commons. wikimedia. org/wiki/File:Ion_Engine_Test_Firing_-_GPN2000-000482. Q: Ion drives have low thrust but high what? A:
OPTIONS:
- power
- acceleration
- tolerance
- efficiency

Answer: efficiency

Question: Answer the following question given this paragraph: Figure 3.9 (a) A typical human brain weighs about 1.5 kg and occupies a volume of roughly 1.1 L. (b) Information is transmitted in brain tissue and throughout the central nervous system by specialized cells called neurons (micrograph shows cells at 1600 magnification). Specialized cells called neurons transmit information between different parts of the central nervous system by way of electrical and chemical signals. Chemical signaling occurs at the interface between different neurons. Q: What are the specialized cells within the brain called? A:
OPTIONS:
- ions
- electrons
- protons
- neurons
Answer: neurons

input with options: Answer the following question given this paragraph: Making Connections: Absolute Zero What is absolute zero? Absolute zero is the temperature at which all molecular motion has ceased. The concept of absolute zero arises from the behavior of gases. Figure 13.9 shows how the pressure of gases at a constant volume decreases as temperature decreases. Various scientists have noted that the pressures of gases extrapolate to zero at the same temperature, 273.15C . This extrapolation implies that there is a lowest temperature. This temperature is called absolute zero. Today we know that most gases first liquefy and then freeze, and it is not actually possible to reach absolute zero. The numerical value of absolute zero temperature is 273.15C or 0 K. Q: The temperature at which all molecular motion has ceased is called what? A:
OPTIONS:
- 0 degrees kelvin
- stopping point
- 0 degrees celcius
- absolute zero
output: absolute zero

Q: Answer the following question given this paragraph: Laurentbonneau. The holes in bread are created by yeast fermentation . CC-BY 3.0. Q: What causes holes in bread? A:

OPTIONS:
- heat
- alcohol fermentation
- moisture
- yeast fermentation

A: yeast fermentation

input: OPTIONS:
- complex microscopes
- scientific microscopes
- nuclear microscopes
- electron microscopes Now, answer this question: Answer the following question given this paragraph: Electron Microscopes In contrast to light microscopes, electron microscopes use a beam of electrons instead of a beam of light. Not only does this allow for higher magnification and, thus, more detail (Figure 3.3), it also provides higher resolving power. Preparation of a specimen for viewing under an electron microscope will kill it; therefore, live cells cannot be viewed using this type of microscopy. In addition, the electron beam moves best in a vacuum, making it impossible to view living materials. In a scanning electron microscope, a beam of electrons moves back and forth across a cell's surface, rendering the details of cell surface characteristics by reflection. Cells and other structures are usually coated with a metal like gold. In a transmission electron microscope, the electron beam is transmitted through the cell and provides details of a cell's internal structures. As you might imagine, electron microscopes are significantly more bulky and expensive than are light microscopes. Q: What powerful microscopes use a beam of subatomic particles instead of a beam of light? A:
A:
output: electron microscopes

Question: Answer the following question given this paragraph: Q: What hormone affects developent and maturation in animals? A:
OPTIONS:
- insulin
- dopamine
- melatonin
- thyroid
Answer:
thyroid