Which statement correctly describes both gases and liquids?
A Their shapes stay the same in any container.
B Their shapes change when they are in different containers.
C Their volumes stay the same in any container.
D Their volumes change when they are in different containers.
The answer is letter B. their shapes change when they are in different continers.
Here are the explantion.
- Liquids and gases are referred to as fluids because they can flow, or move. The molecules themselves are in continuous, random motion in any fluid, collisioning with each other and with any container's walls. The Navier-Stokes Equations describe the motion of fluids and the reaction to external forces, which represent a conservation of mass, momentum , and energy. Newton's Laws of Motion explains the motion of solids, and the response to external forces.
- Any material can be present in either process. Water remains as a liquid, under normal atmospheric conditions. Yet if we slip below 0 degrees Celsius, or 32 Degrees Fahrenheit, water converts its transition into an ice-solid. Similarly, if we heat a volume of water past 100 degrees Celsius, or 212 degrees Fahrenheit, water transforms its phase into a gas called water vapour. Changes in the flow of matter are physical changes, not chemical. A water vapor molecule has the same chemical formula, H2O, as a liquid water molecule, or an ice molecule.
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