07.04.24

Question 1

What are the two strategies practiced for the preservation of a variety of living species globally

Answer 1

1. In-situ conservation
2. Ex-situ conservation

Question 2

• process of protecting an endangered plant or animal species in its natural habitat
• process of collecting specimens or data in the wild or on-site

Answer 2

in-situ

Question 3

• relocation of endangered or rare species from their natural habitats to protected areas equipped for their protection and preservation
• collection of samples in the wild for its analysis in the laboratory

Answer 3

ex-situ

Question 4

What is proper sample preservation and handling for

Answer 4

accurate materials analyses

Question 5

if samples are not cared for properly, important information may be..

Answer 5

• destroyed
• adulterated
• obscured

Question 6

where does soil sampling depend

Answer 6

• depth of desired sample
• type of sample required
• soil type

Question 7

what are the type of sample required

Answer 7

1. disturbed
2. undisturbed

Question 8

This type of sample is collected in a way that disrupts the natural structure and arrangement of the soil layers

Answer 8

disturbed sample

Question 9

This type of sample is collected in a way that preserves the natural structure and layering of the soil as much as possible.

Answer 9

undisturbed sample

Question 10

may be easily sampled using a spade, trowel, and scoop

Answer 10

near-surface soils

Question 11

may be performed using a hand auger, continuous flight auger, a trier, a split-spoon, or, if required, a backhoe

Answer 11

sampling at greater depths

Question 12

preservation method of soil sample not generally recommended

Answer 12

chemical preservation

Question 13

how to minimize potential reaction in soil sample

Answer 13

cooled and protected from sunlight

Question 14

Primary potential problems associated with soil sampling

Answer 14

1. cross contamination
2. improper soil collection

Question 15

• can be eliminated or minimized through the use of dedicated sampling equipment
• if not possible or practical, then decontamination of sampling equipment is necessary

Answer 15

cross contamination

Question 16

can involve using contaminated equipment, disturbance of the matrix resulting in compaction of the sample, or inadequate homogenization of the samples, resulting in variable, non-representative results

Answer 16

improper sample collection

Question 17

refers to the maximum amount of time a sample can be stored before analysis without compromising the accuracy of the results

Answer 17

Hold time

Question 18

common sampling methods for laboratory analysis

Answer 18

1. grab sample
2. composite sample

Question 19

a discrete, individual sample taken within a short period of time (usually less than 15 min.)

Answer 19

grab sample

Question 20

• sample comprised of a series of individual aliquots that have been combined to reflect mean analyte concentrations of the discharge during the sampleing period
• can be developed based on time or flow rate or depth

Answer 20

composite sample