Properties of Matter (43)

density

How tightly matter is packed in an object. Objects float if their density is less than the liqid Remember: you must know an object's MASS and VOLUME to find this **The density of an object makes it float or sink in a liquid like water. If something is more dense than water, it will sink. If it is less dense than water, it will float.

Can the state of matter change?

Changes a different temperatures. 1)When a solid is heated its particles move faster reaching the melting point: solid -> liquid 2)Temperature increase, particles move faster, reached evaporation: liquid -> gas 3)Temperature decrease: particles slow down and come closer together. At condensation point gas -> liquid 4)Colder. Freezing point: liquid to solid.

Sublimiation

When a solid changes to gas (without passing the liquid state. Example dry ice.

chemical property

a characteristic of matter than can be observed only when matter is changed into a new kind of matter Example: ability to burn

physical property

a characteristic of matter that can be measured or observed without changing matter into something new Examples: texture, size, shape, color, Mass, Volume, Weight

molecule

a single particle of matter made up of two or more atoms joined together

mass

amount of matter in an object. Unit of mass = gram (g)

matter

anything that has mass and volume( takes up space)

weight

measure of the pull of gravity on an object unit = pound (lb) Mass and weight is not the same. Mass keep constant independent of the planet. Weight is affected by gravity. For example, weight is less in the Moon than in Earth (but the mass is the same)

solid

molecules are packed close together in a regular pattern example: ice

gas

molecules move quickly and do not stay close together, do not form any pattern example: water vapor

liquid

molecules slide past each other but stay close together, do not form a regular pattern example: water

atom

smallest particle of matter that has the properties of that matter

volume

the amount of space that matter takes up *You can find the volume of a solid by dropping the object into a cylinder of water and determining how much water has been displaced. Unit: milliliter (liquid) = cm^3 (solid)

states of matter

three forms that matter usually takes: solid, liquid, and gas. The behaviour of the particles of matter determines the state of matter: 1)Solids: particles line up in an organized pattern. 2)liquid: particles move more than in a solid -> the liquid can take the shape of its container. 3)Gases:particles move very rapidly and are widely spread with lots of empty space between tehm