Answer the following question given this paragraph: Like water in the ocean, air in the atmosphere exerts pressure that increases with depth. Most gas molecules in the atmosphere are pulled close to Earth's surface by gravity. As a result, air pressure decreases quickly at lower altitudes and then more slowly at higher altitudes. This is illustrated in Figure below . Air pressure is greatest at sea level, where the depth of the atmosphere is greatest. At higher altitudes, the pressure is less because the depth of the atmosphere is less. For example, on top of Mount Everest, the tallest mountain on Earth, air pressure is only about one-third of the pressure at sea level. At such high altitudes, low air pressure makes it hard to breathe and is dangerous to human health. Q: Most gas molecules in the atmosphere are pulled close to earth's surface by what force? Choices: - weight - light - traction - gravity A:
gravity
Answer the following question given this paragraph: Convection is the transfer of thermal energy by particles moving through a fluid. Thermal energy is always transferred from an area with a higher temperature to an area with a lower temperature. Q: What term is used to describe the transfer of thermal energy by particles moving through a fluid? Choices: - condensation - diffusion - evaporation - convection A:
convection
Q: Answer the following question given this paragraph: In practice, chemical research is often not limited to just one of the five major disciplines. A particular chemist may use biochemistry to isolate a particular chemical found in the human body such as hemoglobin, the oxygen carrying component of red blood cells. He or she may then proceed to analyze the hemoglobin using methods that would pertain to the areas of physical or analytical chemistry. Many chemists specialize in areas that are combinations of the main disciplines, such as bioinorganic chemistry or physical organic chemistry. Q: What is the oxygen carrying component of red blood cells called? Choices: - molecule - mitochondria - platlet - hemoglobin A:
A: hemoglobin
Question: Answer the following question given this paragraph: The aphotic zone is water deeper than 200 meters. This is where too little sunlight penetrates for photosynthesis to occur. As a result, food must be made by chemosynthesis or else drift down from the water above. Q: What is the minimum depth in the aphotic zone? Choices: - 150 meters - 450 meters - 10 meters - 200 meters A:
Answer: 200 meters
*Question*
Answer the following question given this paragraph: Examples of alloys include steel, bronze, and brass. Q: Steel, bronze, and brass are good examples of what? Choices: - metalloids - elements - salts - alloys A:
**Answer**
alloys
*Question*
Answer the following question given this paragraph: When matter reacts, there can be mass that comes from nowhere and is unaccounted for. Q: When matter reacts, there can be what that comes from nowhere and is unaccounted for? Choices: - concentrations - combustions - bonds - mass A:
**Answer**
mass