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Unit 1 & 2 Science
Matter
Question | Answer |
---|---|
Matter | Anything that takes up space and has mass |
Law of Conservation of Matter | Matter cannot be created or destroyed, only transformed from one state to another |
Density | How tightly packed the particles in a substance are |
Mass | The amount of matter in an object |
Volume | How much space an object takes up |
Atoms | Basic building blocks of matter |
Proton | subatomic particle found in nucleus of atom, positive charge |
Neutron | subatomic particle found in nucleus of atom, no charge |
Electron | subatomic particle in orbit around atom , negative charge |
Atomic Number | number of protons in nucleus of atom |
Element | Pure substance made up of only one kind of atom |
Compound | Two or more elements chemically combined |
Mixture | Two or more substances not chemically combined- can be separated |
Metal | Has luster, is malleable and conductive |
Non metal | No luster, brittle, non conductive |
Metalloid | Has qualities of metals and non metals, semi-conductors |
Luster | shiny- reflects light |
Malleable | Can be reshaped with out breaking |
Conductivity | Easily allows heat or electricity to flow through |
Ductility | ability to be stretched into wire |
State of Matter | solid liquid or gas |
Physical Change | change to the shape or state of matter, usually can be undone, no molecular change |
Chemical Change | change to the molecules of a substance, usually cannot be undone, a new substance is formed |
Hypothesis | an educated guess |
Chemical Symbol | a 1,2,3 letter abbreviation of an element's name |
D=M/V | equation for density of an object |