Question | Answer |
Fossil Fuels | fuels that are formed from decaying remains of ancient plants and animals |
Nonrenewable Resources | fuels that cannot be replaced by natural process as quickly as they are being used |
Renewable Resources | fuels that can be replaced as quickly as they are used |
Nuclear Reactor | where nuclear reactions happen |
Nuclear Fission | splitting U-235 nuclei to produce energy |
Hydroelectricity | produced by moving water |
Tidal Energy | produced by waves |
Wind Energy | produced by wind |
Geothermal Energy | contained in magma |
Biomass | renewable organic material that can be used to produce energy |
Wave | disturbance that carries energy |
Medium | material through which a wave travels |
Transverse Wave | the medium moves at right angles to the direction the wave is traveling |
Compressional Wave | mater vibrates in the same direction as the wave |
Crest | the top part of a wave |
Trough | the bottom part of a wave |
Amplitude | amount of energy carried by a wave |
Wavelength | distance between wavelength |
Frequency | number of waves passed by per a second |
Fm | frequency modulation |
Am | amplitude modulation |
Plane Mirror | mirror with a flat surface |
Convex Mirror | mirror curves outwards |
Convex Lens | lens is thicker in the middle thin at edges |
Concave Mirror | mirror curves in |
Concave Lens | thinner in the middle thicker at the edges |
Substance | definite composition |
Element | one kind of atom |
Compound | two or more |
Mixture | variable composition |
Homogeneous Mixture | evenly spread out |
Heterogeneous Mixture | unevenly mixed |
Solution | largest particles, unevenly spread out, particles settle |
Colloid | never settles, largest particles, scatters light |
Chemical Bond | force that holds atoms together in a compound |
Ionic Bond | electrons are transferred creating opposite charges which attract |
Ion | an atom that has gained or lost and electron |
Covalent Bond | force of attraction between atoms in a molecule that share electrons |
Polar Molecule | electrons shared unevenly |
Nonpolar Molecule | electrons shared unevenly |
Toxic | poisonous |
Corrosive | "to tear up" |
Volatile | evaporates easily |
Binary Compound | composed of two elements |
Hydrate | ionic compound that has water chemically attached to ti's ions |
Period | T-inverse of frequency |
Resonance | vibrations that build when objects are forced to vibrate at their natural frequencies |
Pitch | human perception of sound frequency based on frequency highness or lowness of sound |
Loudness | human perception of loudness of sound |
Sonar | sound navigation and ranging |
Music | a regular pattern formed by using specific pitches and sound quality |
Noise | no set pattern or pitch |
Overtones | multiples of the frequency |
Cogulation | process of destroying the colloid structure of pollution particles |
Physical Property | characteristics of a material that you can observe without changing the material itself |
Physical Change | change in appearance without a change in identity |
Chemical Property | characteristics of a material that tells if it can go over certain chemical changes |
Chemical Change | a change of one substance into a different substance |
Combustion | a synthesis reaction in which a substance reacts with oxygen to produce energy in the form of heat and light |
Decomposition | one substance breaks down into two or more |
Single Displacement Reaction | one element replaces another compound |
Precipitate | a solid that is formed in a reaction |
Catalyst | substance that speeds up a chemical reaction without itself being always charged |
Enzyme | a catalyst in the body which makes body reactions go quickly |
Inhibitor | substances which prevent reactions |
Plasma | gas-like mixture of charged particles |
Pressure | force spread out over an area |
Isotope | same element with a different number of nuetrons |
Reflection | waves striking an object and bouncing off |
Refraction | bending of waves caused by a change in speed when moving from one medium to another |
Alloy | solid solution |
Solute | substances being dissolved |
Solvent | substances that dissolves the solute |