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Bio Exam 1 > Ch 3: Water and Life > Flashcards

Ch 3: Water and Life Flashcards

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Biology 101 flashcards
1
Q

What is a polar covalent bond?

A

unequal distributions of electrons

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2
Q

What is a polar molecule?

A

unequal sharing of electrons and shape

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3
Q

What are the four emergent properties of water that contribute to Earth’s suitability of life?

A

cohesive behavior, abilitiy to moderate temperature, expansion upon freezing, and versatility as a solvent

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4
Q

What is cohesion?

A

the linkages between water fromhydrogen bonds

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5
Q

What results from cohesion?

A

surface tension

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6
Q

How does water moderate temperature?

A

water absorbs heat from air and releases stored heat to air that is cooler

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7
Q

What is kinetic energy?

A

energy of motion

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8
Q

Temperature equals

A

average kinetic energy

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9
Q

Thermal energy equals

A

totals kinetic energy

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10
Q

Thermal enegy in transfer equals

A

heat

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11
Q

What is specific heat?

A

the amount of heat that must be absorbed or lost for 1g of a substance to change its temperature by 1degrees celsius

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12
Q

What is calorie?

A

the amount of heat it takes to raise the temperature of 1g of water by 1 degree celsius

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13
Q

What is heat of vaporization?

A

quantity of heat a liquid must absorb for it to evaporate/vaporize

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14
Q

What is a solution?

A

homogeneous mixture of two + substance

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15
Q

What is a solvent?

A

dissolving agent of a solution

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16
Q

Aqueous solution

A

a solution in which the solvent is water

17
Q

What is a solute?

A

the substance that is dissolved

18
Q

What is hydrophilic?

A

any substance that has an affinity for water

19
Q

What is hydrophobic?

A

substance that repels water

20
Q

What is molarity?

A

the number of moles of solute per liter of solution

21
Q

What is an acid?

A

a substance that inceases the hydrogen ion concentration of a solution, pH from 6-0

22
Q

What is an base?

A

a substance that reduces the hydrogen ion concentration of a solution, pH 8-14

23
Q

What is the constant concentration of a solution?

A

10^-14

24
Q

What is the pH of a neutral solution?

A

pH of 7

25
Q

What is a buffer?

A

a substance that minimizes changes in the concentrations of H+ and OH- in a solution

Bio Exam 1 (8 decks)

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