Question | Answer |
Matter | anything that has mass and takes up space. |
Chemistry | Study of the properties of Matter and how Matter changes. |
Chemical property | Is a characteristic of a pure substance that describes its ability to change into another substances. |
Physical property | A characteristic of a pure substance that can be observed without changing it into another substance. |
Element | A pure substance that cannot be broken down into other substances by chemical or physical means. |
Atom | A basic particle from which all elements are made. |
Molecule | A particle made of two or more atoms bonded together. |
Compound | A pure substance of two or more elements chemically combined. |
Chemical formula | A formula that gives the elements in a compound and the ratio of atoms. |
Mixture | Two or more substances that are mixed together but not chemically combined. |
Solution | Is an example of a homogeneous mixture: forms when substances dissolve. |
Weight | A measure of the force of gravity on an object. |
Mass | A measure of how much matter is in an object. |
Volume | The amount of space matter occupies. |
Density | The measurement of how much mass of a substance is contained in a given volume. density = mass over volume. |
Energy | Is the ability to do work or cause change. every chemical or physical change in matter includes a change in energy. |
Nucleus | Control center, directing all of the cells activity. |
Liquid | A state of matter that has no definite shape but has a definite volume |