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science final exam 1
Physical Science Final Exam Review Szerdy part 1
Term | Definition |
---|---|
Electromagnetic Spectrum | different frequencies of light energy, including Radio Waves, Microwaves, Infrared, visible light, Ultraviolet light, x-ray, and Gamma Rays. |
Physical Properties | properties that can be observed WITHOUT CHANGING the substance. Examples : electrical conductivity, thermal conductivity, solubility, magnetic properties, melting point, boiling point, density. |
Chemical Properties | Properties that involve CHANGE the substance into something else. Examples: the ability to rust, the ability to burn, the ability to tarnish. |
Density | Mass/Volume |
Mass | the amount of matter in an object (Does not change in space!) |
Weight | the pull of gravity on an object (Changes on other planets and in space!) |
Volume | The amount of space an object fills. |
Physical Change | Changes appearance of an object, but it is still the same substance. (Example: tearing paper, breaking glass, cutting hair, melting ice, boiling water) |
Chemical Change | Changes what a substance IS. (Examples: Burning wood to ash, metal turning to rust.) |
Law of Conservation of Matter | Matter can NOT be created or destroyed...but it CAN change forms. |
Atom | the smallest unit of an element. |
Proton | Positive Charge, in the nucleus of an atom. |
Neutron | Neutral Charge, in the nucleus of an atom. |
Electron | Negative Charge, in the electron cloud of an atom. |
Element | only one type of atom. Each Square on the periodic table. (Hydrogen, Nitrogen) |
Molecule | More than one atom joined together (Example: C6H12O6 - sugar) |