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Course: Alhussan Biology — Stage 8
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Alhussan Biology — Stage 8

Chapter 5: Respiration and the Respiratory System

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Chapter 6: Nutrition, Health and Movement

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Chapter 7: The Health of the Environment

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Chapter 8: Weather and Climate

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Quiz

7.7 Sampling your ecosystems — Quiz

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  • Questions count: 50
  • Passing grade: B+
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1.
Which statement is correct?
Pitfall traps catch flying birds.
Each quadrat can use a different counting rule.
Grass is easy to count plant by plant.
A quadrat of 1 m × 1 m has an area of 1 m².
2.
Random sampling avoids choosing only the most ____ places.
wet
boring
interesting
dark
3.
A good sample is large enough and taken without ____.
data
care
bias
quadrats
4.
Moss plants along a transect from a hedge. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 1
A
B
C
D
5.
The graph shows results along a transect from a hedge. What conclusion is best?
Dr Dabour Hub Academy - figure 2
Moss needs bright light
Moss increases away from the hedge
Light has no link with moss
Moss is most common where light is lowest, near the hedge
6.
Moss fell from 24 plants to 2 along a transect. What is the percentage decrease?
8%
92%
22%
1100%
7.
A ____ is used to collect small animals by sucking them into a tube.
quadrat
net
potometer
pooter
8.
True or false? Pooters collect small animals.
True
False
9.
Which statement is correct?
Small samples are always best.
The same counting rule must be used for every quadrat.
Pitfall traps catch flying birds.
Abiotic factors need not be measured on a transect.
10.
True or false? Plotting results against distance shows changes in numbers.
True
False
11.
True or false? Random sampling avoids choosing only the most interesting places.
True
False
12.
A transect is used when conditions change ____.
randomly
gradually
suddenly only
never
13.
Which statement is NOT correct?
Each quadrat can use a different counting rule.
A good sample is large enough and taken without bias.
Mean number per quadrat × area of field gives an estimate.
Grass is recorded as percentage cover.
14.
A quadrat is 0.5 m × 0.5 m. What is its area?
0.25 m²
0.50 m²
1.00 m²
2.00 m²
15.
Daisies counted in five 1 m² quadrats. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 3
A
B
C
D
16.
Quadrats sample plants and ____.
slow-moving animals
fish
birds in flight
clouds
17.
Animals caught by different methods. What is the value for Pooter?
Dr Dabour Hub Academy - figure 4
13
21
28
39
18.
When is a transect used?
When conditions change gradually, e.g. from a hedge into a field
Only in deserts
To measure pH
To catch flying insects
19.
True or false? Nets sweep insects from vegetation.
True
False
20.
An abiotic factor such as ____ is measured at each point.
light
competition
disease
predators
21.
Grass is recorded as ____.
percentage cover
mass
number of plants
height
22.
Which statement is NOT correct?
Nets sweep insects from vegetation.
Grass is recorded as percentage cover.
A common quadrat size is 0.5 m by 0.5 m.
Pitfall traps catch flying birds.
23.
Daisies in 5 quadrats (1 m²): 3, 5, 2, 6, 4. Estimate the number in a field of 200 m².
800 daisies
4 daisies
20 daisies
4000 daisies
24.
Moss plants along a transect from a hedge. Which statement best describes the pattern?
Dr Dabour Hub Academy - figure 5
"Moss plants" increases as "Distance from hedge (m)" increases
"Moss plants" stays the same
"Moss plants" rises to a peak at 0, then falls
"Moss plants" decreases as "Distance from hedge (m)" increases
25.
Moss fell from 24 plants to 1 along a transect. What is the percentage decrease?
2300%
23%
96%
4%
26.
Which is the correct definition of “Distribution”?
The amount of crop produced.
Where organisms are found in an area.
The animal that receives the highest toxin dose.
Protecting species and habitats.
27.
A quadrat of 1 m × 1 m has an area of ____.
1 m²
2 m²
4 m²
0.5 m²
28.
Why should quadrats be placed randomly?
To count fewer organisms
To find the most interesting places
To save time
To avoid bias
29.
Animals caught by different methods. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 6
A
B
C
D
30.
True or false? Grass is recorded as percentage cover.
True
False
31.
Mean number per quadrat × area of field gives an ____.
bias
error
exact count
estimate
32.
Sample results can be ____ for a removal plan.
guesses
evidence
stories
opinion
33.
A quadrat is 0.25 m × 0.25 m. What is its area?
0.25 m²
0.06 m²
0.50 m²
1.00 m²
34.
Daisies in 5 quadrats totalled 30. Each quadrat is 1 m². Estimate the number in a field of 400 m².
430 daisies
12,000 daisies
6 daisies
2400 daisies
35.
True or false? Each quadrat can use a different counting rule.
True
False
36.
True or false? Pitfall traps catch flying birds.
True
False
37.
Which term matches this definition? “A sample that does not represent the whole area.”
Seed dispersal
Bias
Persistent
Secondary consumer
38.
Moss plants along a transect from a hedge. At what value of "Distance from hedge (m)" is "Moss plants" smallest?
Dr Dabour Hub Academy - figure 7
10
2
8
0
39.
Which term matches this definition? “A line along which samples are taken.”
Transect
Conservation
Producer
Biological control
40.
Which term matches this definition? “Where organisms are found in an area.”
Quarantine
Abiotic factor
Biome
Distribution
41.
A quadrat is 2 m × 2 m. What is its area?
40.00 m²
8.00 m²
4.00 m²
2.00 m²
42.
Daisies in 5 quadrats totalled 15. Each quadrat is 1 m². Estimate the number in a field of 100 m².
1500 daisies
3 daisies
115 daisies
300 daisies
43.
Animals caught by different methods. Which has the smallest value?
Dr Dabour Hub Academy - figure 8
Pitfall trap
Tree beating
Sweep net
Pooter
44.
Which term matches this definition? “The proportion of a quadrat covered by a plant.”
Transect
Percentage cover
Producer
Yield
45.
Which statement is NOT correct?
Sample results can be evidence for a removal plan.
Pitfall traps catch ground insects.
Quadrats sample plants and slow-moving animals.
Abiotic factors need not be measured on a transect.
46.
Daisies counted in five 1 m² quadrats. Which graph shows these results correctly?
Dr Dabour Hub Academy - figure 9
A
B
C
D
47.
The same counting rule must be used for ____ quadrat.
the first
one
no
every
48.
Which is the correct definition of “Random sampling”?
Using a natural enemy to control a pest.
A tube for sucking up small animals.
Nutrients plants compete for in the soil.
Placing samples by chance to avoid bias.
49.
Which term matches this definition? “A tube for sucking up small animals.”
Biological control
Pooter
Food chain
Nocturnal
50.
Daisies in 5 quadrats totalled 30. Each quadrat is 1 m². Estimate the number in a field of 100 m².
3000 daisies
130 daisies
600 daisies
6 daisies
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Part of Chapter 7: The Health of the Environment — see every lesson and quiz in this unit.
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