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22 Cards in this Set
- Front
- Back
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Combination |
two or more components combine to form one |
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Decomposition |
A complex molecule breaks down to form two simple ones |
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Precipitation |
Two soluble solutions combine to make one insoluble |
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Neturalisation |
Acid+Base= salt and water |
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Combustion |
Oxygen+ compound= Carbon Dioxide and water |
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Displacement |
a more reactive element displaces a less reactive element from its compound |
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Conservation of mass |
Matter is neither created nor destroyed, electrons are rearranged |
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Astrology |
Movements and relative positions of celestial bodiesand how these can be interpreted as having an influence on human affairs and the world around us |
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Astronomy |
study of the sun, moon, the plants, stars and galaxies and allother objects for much recorded history |
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Scientific method |
ideas and hypotheses to be testablebefore they can be accepted as scientific law, principals or theories |
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Greenhouse effect/global warming |
The earth gets energy from the sun. The earth cools through infrared radiation. Greenhouse gas in the atmosphere stops some of the energy from escaping, keeping out earth war. Carbon dioxide is making this layer thicker, causing our earth to heat up. |
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Carbon Cycle |
Carbon dioxide is exchanged naturallybetween three active reservoirs: the atmosphere, theocean and biomass. Carbon travels through the food chain and then isreleased as carbon dioxide |
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Layers of the Universe |
Lithosphere Hydrosphere Atmosphere Trophosphere Stratosphere Mesosphere Thermosphere Exosphere |
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The big bang |
matter and radiation,was compressed into a hot, dense mass. 10 billion to 20 billion years ago, amassive blast allowed theuniverse expanded with incomprehensible speed from itspebble-size origin to astronomical scope. Expansionhas apparently continued, but much more slowly. as time passed and matter cooled,more diverse kinds of atoms began to form, and they eventually condensed intothe stars and galaxies of our present universe. |
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Doppler effect- source move towards |
wavelength decreases and the frequency increases |
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Doppler effect- source moves away |
wavelength increases and the frequency decreases |
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Activity of metals |
Most Reactive-Sodium-Magnesium-Aluminium-Zinc-Iron-Tin-Lead-Copper-GoldLeast Reactive |
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Ammonium |
NH4+ |
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HydrochloricAcid |
HCl |
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SulfuricAcid |
H2SO4 |
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Hydroxide |
OH |
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Electron shell configuration |
2,8,18,32 |
