The theory of sampling

Question 1

sampling

Answer 1

collecting observations from a small area which is representative of a large area

Question 2

what do scientists find out through sampling?

Answer 2

-distribution
-abundance

Question 3

distribution

Answer 3

where an organism is found

Question 4

abundance

Answer 4

the number of that organism present

Question 5

what does the type of sampling technique used depend on?

Answer 5

-habitat
-type of organisms present

Question 6

what are the different techniques for sampling animals?

Answer 6

-pooters
-sweep nets
-kick sampling
-tree beating
-pitfall traps

Question 7

describe how pooters work

Answer 7

-used to catch small insects
-the user sucks on the mouthpiece to draw insects into the chamber through the tube
-a filter stops bugs from going in the persons mouth

Question 8

describe how sweep nets work

Answer 8

-used to catch flying insects that live in long grass or ponds

Question 9

describe how kick sampling works

Answer 9

-captures organisms released in flowing water
-you kick the river bed and catch the organisms downstream with a net

Question 10

describe how tree beating works

Answer 10

-hold a cloth under a tree or bush
-shake / beat the vegetation to dislodge invertebrates

Question 11

describe how pitfall traps work

Answer 11

-used to capture insects
-cover the hole with a roof so the top doesn’t fill with water

Question 12

what are the different types of identification keys?

Answer 12

-numbered / dichotomous key
-branched / spider key

Question 13

what is an identification key?

Answer 13

it identifies living organisms by asking a series of questions about an organisms characteristics

Question 14

describe numbered / dichotomous key

Answer 14

correct answer to each question tells you which number question to go to next

Question 15

describe branched / spider key

Answer 15

yes and no questions