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AP Biology > Chapter 3- Water > Flashcards

Chapter 3- Water Flashcards

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AP® Biology flashcards Biology 101 flashcards
1
Q

Polar molecule

A

Unequal sharing of electrons so charges an equally distributed

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2
Q

True or false. Bonds are very fragile in the water state and often breaks in bonds to neighbors.

A

True

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3
Q

Are the four emergent properties of water that contribute to the earth’s suitability for life?

A

Cohesive behavior, ability to moderate temperature, expansion when frozen, and important as a solvent

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4
Q

Cohesion

A

The linkage and hydrogen bonds which makes it more structured and holds the substance together

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5
Q

Adhesion

A

Clinking of one substance to another

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6
Q

Surface Tension

A

Measure of how difficult it is to stretch or break the surface of a liquid

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7
Q

Is the surface tension of water high or low and why?

A

High and because of strong hydrogen bonds

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8
Q

Adoration of the temperature of water

A

Water moderate air temperature by working the heat and releasing cooler air, also reverses without slight change of temperature

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9
Q

Kinetic Energy

A

Energy of movement

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10
Q

Thermal energy

A

KE and movement of atoms, depends on volume

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11
Q

Temperature

A

Measure of energy and represents average kinetic energy of a molecule, movement increases with heat

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12
Q

Heat

A

Thermal energy in transferred from one to another

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13
Q

Calorie

A

Heat takes to raise 1 g of water to 1°C

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14
Q

Joule

A

Measures energy

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15
Q

Water have a high specific heat?

A

Yes. It stabilizes heat because of the high specific heat and when it does change it absorbs or loses relatively large quantity of heat each degree change

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16
Q

Specific Heat

A

Amount of heat that must be absorbed or lost for 1g to change the temperature 1°C, how well it resist change in temperature when it absorbs or releases heat

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17
Q

What makes water have high specific heat?

A

Hydrogen bonds, when the bonds break it up towards heat and when they form it releases heat, small change in waters temperature because most heat is used to disrupt hydrogen bonds for water molecules move faster to heat up

18
Q

Heat of evaporation

A

Quantity of heat a liquid must absorb for 1 g of it to change from a liquid to a gas

19
Q

Evaporative cooling

A

Liquid evaporates, surface of the liquid remains behind equals which stabilizes the temperature

20
Q

Why does water float on ice?

A

Because it is less dense

21
Q

Transiently

A

Hydrogen bonds breaking and reforming constantly

22
Q

Homogeneous

A

Same everywhere in the mixture

23
Q

Solution

A

Two or more substances

24
Q

Solvent

A

Dissolving agent

25
Q

Solute

A

Dissolves

26
Q

Aqueous solution

A

Solute dissolves in water

27
Q

Hydration shell

A

Sphere of H2O molecules around each dissolved ion

28
Q

Hydrophilic

A

Water loving, absorbs water

29
Q

Hydrophobic

A

Non-ionic and polar, repels water

30
Q

What type of molecule is a water molecule?

A

Polar

31
Q

Polarity

A

Unequal sharing of electrons

32
Q

Where do most H2O properties come from? Name a few.

A

Polarity, surface tension, expand when frozen=less dense, cohesion, adhesion, and insulators

33
Q

What are the 4 main elements in our body?

A

CHON

34
Q

What are the minor ones?

A

PCaSK

35
Q

What effects the behavior of an atom?

A

Number of electrons in the valence she’ll

36
Q

True or false. Elements in the same column have same valence and similar chemical properties.

A

True

37
Q

Are Hydrogens bonds weak or strong?

A

Weak

38
Q

What are the strong bonds?

A

Covalent bonds

39
Q

Why are covalent bonds strong?

A

1) two atoms share pair of electrons
2) both holds onto it
3) very stable

40
Q

What do more bonds mean?

A

Stronger

41
Q

What is SPONCHCF

A

Sulfur phosphorus oxygen nitrogen carbon hydrogen calcium iron

AP Biology (9 decks)

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