7. Define :
(a) Solid
(b) Liquid
(c) Gas
Give two examples of each type.
Answers
SOLID - particles are tightly packed
see from naked eye
Answer:
Solid
Solid is one of the four fundamental states of matter. The atoms in a solid are closely packed together and contain the least amount of kinetic energy. A solid is characterized by structural rigidity and resistance to a force applied to the surface.
Examples of solids are common table salt, table sugar, water ice, frozen carbon dioxide (dry ice), glass, rock, most metals, and wood. When a solid is heated, the atoms or molecules gain kinetic energy .
Liquid
A liquid is a nearly incompressible fluid that conforms to the shape of its container but retains a (nearly) constant volume independent of pressure. As such, it is one of the four fundamental states of matter (the others being solid, gas, and plasma), and is the only state with a definite volume but no fixed shape.
At room temperature, examples of liquids include water, mercury, vegetable oil, ethanol. Mercury is the only metallic element that is a liquid at room temperature, although francium, cesium, gallium, and rubidium liquefy at slightly elevated temperatures
Gas
A gas is a sample of matter that conforms to the shape of a container in which it is held and acquires a uniform density inside the container, even in the presence of gravity and regardless of the amount of substance in the container. ... A sample of gaseous matter can be compressed.
Examples of gases are oxygen at room temperature (approximately 20 ºC or 68 ºF), hydrogen at room temperature, and water at standard atmospheric pressure and a temperature above 100 ºC or 212 ºF.