which statements correctly describe the properties of air? select three options.\n□ air has mass but no…

which statements correctly describe the properties of air? select three options.\n□ air has mass but no weight.\n□ air pressure is created by the weight of the atmosphere pushing on earths surface.\n□ pressure is a measure of how tightly molecules are packed.\n□ denser air is heavier than less dense air.\n□ air is less dense at higher altitudes.

which statements correctly describe the properties of air? select three options.\n□ air has mass but no weight.\n□ air pressure is created by the weight of the atmosphere pushing on earths surface.\n□ pressure is a measure of how tightly molecules are packed.\n□ denser air is heavier than less dense air.\n□ air is less dense at higher altitudes.

Answer

Brief Explanations:

  1. Air has mass and weight due to the gravitational force acting on its mass, so the statement "Air has mass but no weight" is incorrect.
  2. Air pressure is indeed created by the weight of the atmosphere pushing on Earth's surface. The column of air above a given area exerts a force, which we measure as air - pressure.
  3. Pressure is related to the force exerted by gas molecules on a surface, not directly a measure of how tightly molecules are packed (density is related to how tightly molecules are packed).
  4. Denser air has more mass per unit volume, so it is heavier than less dense air.
  5. At higher altitudes, there is less air above a given point, so air is less dense.

Answer:

B. Air pressure is created by the weight of the atmosphere pushing on Earth’s surface. D. Denser air is heavier than less dense air. E. Air is less dense at higher altitudes.