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The secret of buoyancy is how objects float in water or air. ... Whether or not an object has buoyancy depends mostly on two factors: the amount of water an object displaces and the density of an object. A pebble is dense and displaces very little water, therefore it sinks.

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A mixture of two or more substances that stays evenly mixed is called a solution.

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An alloy is a substance made of two or more metals or of a metal and nonmetallic materials. To make an alloy, the ingredients are melted and mixed together. When the mixture cools, it hardens.

Alloys are generally more useful than pure metals. Pure metals may rust or wear away easily. They may also be too soft to hold a shape. But mixing other substances with a pure metal often results in a hard and strong substance.

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Evaporation is a process where liquids change to a gas or vapor. Water changes to a vapor or steam from the energy created when molecules bounce into one another because they're heated up. Sweat drying from our body is a great example of evaporation.

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When liquids freeze.

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Tiny water drops hovering in the air are called fog. Fog is like a cloud, but it is near the ground, not high in the sky. Thick fog makes it difficult to see the surrounding landscape.

Fog forms from water vapor, which is water in the form of a gas. Water vapor in the air condenses, or turns back into liquid, when the air cools. Fog appears when this liquid gathers around bits of dust in the air. A gentle wind helps fog to form and to stay in the air. If the water vapor condenses on the ground instead, it is called dew.

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to cause to change from a solid to a liquid state.
Melting, or fusion, is a physical process that results in the phase transition of a substance from a solid to a liquid.

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The copper conductors utilized in the electrical wiring of homes and industrial plants are insulated from each other and from the building by rubber or plastics.

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Materials that conduct heat or electricity are known as conductors. Materials that do not conduct heat or electricity are known as insulators. Insulators and conductors have many useful functions.

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Something that is dense means it’s stores up water.DescriptionCondensation is the change of the physical state of matter from the gas phase into the liquid phase, and is the reverse of vaporization. The word most often refers to the water cycle.

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From your clothes to your desk, every bit of matter is made of tiny particles called atoms. Atoms have negatively charged electrons that spin around them. Most of the time, the electrons spin in random directions. When the electrons all spin in the same direction, though, they create an invisible force known as magnetism.When something is magnetic, it can pull things with steel or iron in them to it. The two ends of a magnet are called the north and south poles. These are the parts where the magnets are strongest. Around these poles is an area known as a magnetic field. In the magnetic field, other objects can be drawn to the magnet.

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Gases are air-like substances that can move around freely or they might flow to fit a container. They don't have a shape either. ... If they get out a container they spread very easily. Gases are all around us in the air that we breathe.

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a substance or object that is solid rather than liquid or fluid.

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Liquid is one of the three principle states of matter. In its characteristics, a liquid is intermediate between a gas and a solid, the other two principle states. Like gases, liquids can flow and take on the shape of the container in which they are placed—characteristics not found in solids. Like solids, liquids have a fixed volume, whereas gases do not.

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How much you/objects weigh.

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Description

Volume is the quantity of three-dimensional space enclosed by a closed surface, for example, the space that a substance or shape occupies or contains.

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Description

Mass is both a property of a physical body and a measure of its resistance to acceleration when a net force is applied. An object's mass also determines the strength of its gravitational attraction to other bodies. The basic SI unit of mass is the kilogram.

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A substance that is solid, liquid, and gas.