Aquatics

Question 1

Salt ______ the boiling point of water.

Answer 1

raises

Question 2

What type of bond occurs in the water molecule?

Answer 2

covalent

Question 3

Why are nitrites harmful?

Answer 3

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.

Question 4

The term melting means _____.

Answer 4

the phase changing from a solid to a liquid

Question 5

What is cohesion?

Answer 5

the attractive force between two or more of the same molecules

Question 6

“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 ____.

Answer 6

Archimedes’ Principle

Question 7

What is hydrostatic pressure?

Answer 7

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

Question 8

What is synergy?

Answer 8

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

Question 9

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

Answer 9

displace

Question 10

What is adhesion?

Answer 10

the attractive force between two unlike substances

Question 11

Sedimentation refers to ____.

Answer 11

the settling of materials at the bottom of a liquid

Question 12

The term vaporization means _____.

Answer 12

the phase changing from a liquid to a gas

Question 13

Solids, such as ice, also have definite _____.

Answer 13

volume, shape, structure

Question 14

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

Answer 14

2 atoms of hydrogen and 1 of oxygen

Question 15

What is surface tension?

Answer 15

a property of liquid that allows it to resist external forces

Question 16

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

Answer 16

Adhesion

Question 17

What type of bond occurs between water molecules?

Answer 17

covalent

Question 18

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

Answer 18

volume

Question 19

______________ water has no definite shape or volume.

Answer 19

Gaseous

Question 20

What are nutrients?

Answer 20

minerals and elements that serve a vital function of living organisms

Question 21

The definition of the term element is ____.

Answer 21

a substance composed of only one type of atom

Question 22

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

Answer 22

sink

Question 23

Where does evaporation occur?

Answer 23

on the surface of the liquid only

Question 24

The definition of the term atom is ____.

Answer 24

the building block of matter; indivisible

Question 25

What is density?

Answer 25

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

Question 26

Total suspended solids refer to ____.

Answer 26

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

Question 27

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

Answer 27

float

Question 28

Ice is held together in a ________ structure.

Answer 28

hexagonal

Question 29

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

Answer 29

phosphorus, nitrogen

Question 30

What is the definition of the word diffusion?

Answer 30

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

Question 31

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

Answer 31

decompression

Question 32

What is pH and what does it measure?

Answer 32

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

Question 33

What happens between 4 and 0 °C?

Answer 33

the hydrogen bonds expand

Question 34

​​​​What is buoyancy?

Answer 34

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

Question 35

What is the definition of the word dissolve?

Answer 35

to become fully incorporated into a liquid

Question 36

Why is carbon dioxide important?

Answer 36

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.

Question 37

Siltation refers to ____.

Answer 37

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

Question 38

What shape is liquid water thought to maintain the longest?

Answer 38

tetrahedron

Question 39

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

Answer 39

be partially submerged

Question 40

The definition of the term hydrogen bond refers to ____.

Answer 40

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

Question 41

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

Answer 41

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

Question 42

The definition of the term molecule is ____.

Answer 42

two or more atoms chemically combined

Question 43

Where does boiling occur?

Answer 43

anywhere in the liquid

Question 44

Total dissolved solids refer to ____.

Answer 44

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

Question 45

Turbidity refers to ____.

Answer 45

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

Question 46

Dissolved carbon dioxide ____.

Answer 46

helps form coral skeletons

Question 47

What is heat capacity?

Answer 47

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

Question 48

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

Answer 48

gas

Question 49

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

Answer 49

cold, less movement, less likely to break free

Question 50

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

Answer 50

due to its potential for pollution and disease

Question 51

A paper clip can float on water because of:

Answer 51

surface tension