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13 Cards in this Set
- Front
- Back
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Trace vs essential element |
Essential elements are those necessary for life to exist while trace elements are those that are needed but only in small amounts |
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Define radiometric dating |
Finding out how many half-lives have passed in elements to determine the age of the organism before being fossilized |
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What is cohesion in water? |
The hydrogen bonds in water cause them to stick together, and helps for processes like transpiration and osmosis |
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What is adhesion in water? |
The hydrogen bonds in water also cause water to stick to the walls of their "container", and also helps for transpiration to occur |
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What is surface tension in water? |
The top layer of water is composed of tightly placed water molecules, making is difficult to stretch or break the top layer of water |
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Temperature vs thermal energy |
Temperature is the average kinetic energy but thermal energy is the random movement (dependent on volume) |
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Define specific heat capacity |
The amount of energy that must be absorbed/lost for 1g of the substance to change its temp by 1 degree |
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Why does water have a high SHC? |
More heat must be absorbed to break the hydrogen bonds and heat is released when hydrogen bonds form |
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Define evaporative cooling |
When liquids evaporate, the remaining liquid becomes cooler |
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Define heat of vaporization |
Quantity of heat a liquid must absorb for 1g of it to be converted from liquid to gas state |
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Why does ice float? |
When water freezes, the water molecules form a crystalline lattice structure because they are too slow to break the hydrogen bonds, therefore giving it a lower density |
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Hydrophobic vs hydrophilic |
Hydrophobic is a repulsion of water and hydrophilic is an affinity to water |
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Structural isomers vs cis-trans isomers vs enantiomers |
Structural isomers differ in covalent arrangements, cis-trans isomers |
