Matter comprises all substances that take up space and have mass, and it may exist as a solid, liquid, gas or plasma. Light and energy are not matter because they have no mass and do not occupy space.Know More
The molecules that make up a solid lie close together and are bound strongly to one another. Because of this, solids have a distinct shape of their own that is not dependent on a container. The molecular bonds of a liquid are weaker than those of a solid, meaning that liquids do not have fixed shape. A liquid takes the shape of its container, but it does not change in volume. Molecules in a gas are very weakly bound. Like liquids, gases take the shape of their container. However, gases also change volume, expanding to fill their entire container.
The fourth phase of matter is plasma. Plasmas exist only at the high temperatures and pressures of the sun or bolts of lightning. Plasmas occur as electrons tear away from atoms, leaving behind positive ions and free electrons. Most scientists consider plasmas to be fluids like liquids and gases. Substance are able to transition between the stages of matter given the application or removal of heat.Learn more about Physics
The four phases of matter are solid, liquid, gas and plasma. Substances can move between these states of matter based on changes in pressure and temperature.Full Answer >
In 1909, Rutherford's X-ray experiments shattered conventional wisdom when he discovered that electrons didn't occupy matter like evenly-distributed raisins in a pudding. However, Bohr found Rutherford's conclusions to be inaccurate and proposed the revolutionary idea that atoms behaved according to the laws of quantum physics.Full Answer >
Mass and weight are closely related because mass affects the weight of an object experiencing the effects of gravity. Weight is the measure of the force of gravity on an object's mass, while mass is the measure of how much matter there is in an object.Full Answer >
Sand is heavier than water when the volume of both substances is equal. The density of dry sand is between 80 and 100 pounds per cubic foot, whereas water is 62 pounds per cubic foot. The density of water depends on its temperature.Full Answer >