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Aquatics > Aquatics > Flashcards

Aquatics Flashcards

1
Q

Salt ______ the boiling point of water.

A

raises

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2
Q

What type of bond occurs in the water molecule?

A

covalent

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3
Q

Why are nitrites harmful?

A

Nitrites can react with the hemoglobin in the blood of warm-blooded animals (like humans) to make a substance called methemoglobin which interferes with the blood’s ability to carry oxygen.

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4
Q

The term melting means _____.

A

the phase changing from a solid to a liquid

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5
Q

What is cohesion?

A

the attractive force between two or more of the same molecules

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6
Q

“A body immersed in a liquid, either wholly or partially, is buoyed up by a force equal to the weight of the liquid displaced by the body.” This quote is known as ____.

A

Archimedes’ Principle

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7
Q

What is hydrostatic pressure?

A

the force a liquid exerts on a body in all directions at one depth

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8
Q

What is synergy?

A

when two or more things work together to produce a greater impact, positive or negative, than either would have by itself

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9
Q

In order to float, an object needs to ___________ as much water as it weighs.

A

displace

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10
Q

What is adhesion?

A

the attractive force between two unlike substances

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11
Q

Sedimentation refers to ____.

A

the settling of materials at the bottom of a liquid

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12
Q

The term vaporization means _____.

A

the phase changing from a liquid to a gas

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13
Q

Solids, such as ice, also have definite _____.

A

volume, shape, structure

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14
Q

What atoms and how many of each make up a water molecule?

A

2 atoms of hydrogen and 1 of oxygen

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15
Q

What is surface tension?

A

a property of liquid that allows it to resist external forces

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16
Q

______________ causes water droplets to hang in the end of a leaf.

A

Adhesion

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17
Q

What type of bond occurs between water molecules?

A

covalent

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18
Q

Liquids, such as liquid water, have a definite ____________, but not a definite shape.

A

volume

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19
Q

______________ water has no definite shape or volume.

A

Gaseous

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20
Q

What are nutrients?

A

minerals and elements that serve a vital function of living organisms

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21
Q

The definition of the term element is ____.

A

a substance composed of only one type of atom

22
Q

According to Archimedes’ principle, if the buoyancy of an object is negative it will ________.

A

sink

23
Q

Where does evaporation occur?

A

on the surface of the liquid only

24
Q

The definition of the term atom is ____.

A

the building block of matter; indivisible

25
Q

What is density?

A

how much stuff is packed into a certain space, mass per unit of volume

26
Q

Total suspended solids refer to ____.

A

a measurement of the total amount of solids in a liquid that cannot pass through a 2-miron filter

27
Q

According to Archimedes’ principle, if the buoyancy of an object is positive, it will ________.

A

float

28
Q

Ice is held together in a ________ structure.

A

hexagonal

29
Q

Too much of ___________ can cause excess algae growth and deplete dissolved oxygen supplies.

A

phosphorus, nitrogen

30
Q

What is the definition of the word diffusion?

A

the process where matter in an area of high concentration moves to an area of low concentration

31
Q

If a diver changes hydrostatic pressure too quickly, it can cause ____.

A

decompression

32
Q

What is pH and what does it measure?

A

it is how acidic or basic something is, it is generally a measure of how many hydrogen ions (H+) or hydroxide ions (OH-) are in the water

33
Q

What happens between 4 and 0 °C?

A

the hydrogen bonds expand

34
Q

​​​​What is buoyancy?

A

upward force that acts on every object that is at least partially submerged in water

35
Q

What is the definition of the word dissolve?

A

to become fully incorporated into a liquid

36
Q

Why is carbon dioxide important?

A

It is an essential part for plants respiration process and is a by product that humans need to survive in order to breathe, Humans and other animals exhale it as a waste product, It produces carbonic acid which improves the quality of air.

37
Q

Siltation refers to ____.

A

the settling of very small particles, such as sand and clay, at the bottom of a liquid

38
Q

What shape is liquid water thought to maintain the longest?

A

tetrahedron

39
Q

According to Archimedes’ principle, if the buoyancy of an object is neutral it will ________.

A

be partially submerged

40
Q

The definition of the term hydrogen bond refers to ____.

A

a bond between molecules due to the attraction of slightly negatively and slightly positively charged atoms

41
Q

Which has more dissolved oxygen, a stream at sea level or a stream up a mountain top? Why?

A

The stream at sea level because there is more air, which increases pressure, pressure allows for more molecules to diffuse into the water.

42
Q

The definition of the term molecule is ____.

A

two or more atoms chemically combined

43
Q

Where does boiling occur?

A

anywhere in the liquid

44
Q

Total dissolved solids refer to ____.

A

a measurement of the total amount of solids dissolved in a liquid that can pass through a 2-micron filter

45
Q

Turbidity refers to ____.

A

a measurement of the amount of solids in a liquid based on how much light is scattered by the solid particles

46
Q

Dissolved carbon dioxide ____.

A

helps form coral skeletons

47
Q

What is heat capacity?

A

the amount of energy needed to raise the temperature of a substance by 1 °C

48
Q

If water behaved like other molecules of similar weight, earth would be a ____.

A

gas

49
Q

Which has more dissolved oxygen, warm or cold water? Why?

A

cold, less movement, less likely to break free

50
Q

Why is fecal coliform in water measured separately from other suspended solids?

A

due to its potential for pollution and disease

51
Q

A paper clip can float on water because of:

A

surface tension

Aquatics (3 decks)

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