Worksheets1.1 Sampling and abiotic factors
Total questions: 20
Worksheet time: 11mins
What is a Belt Transect?
A way of sampling the effect of an abiotic factor on the distribution of organisms
A way of sampling a non-changing habitat
A way of measuring the effect of a biotic factor on the distribution of organisms
Using a grid with coordinates to place quadrats is an example of:
random sampling
systematic sampling
Using a transect to place quadrats is an example of:
systematic sampling
random sampling
What is the best way to place a quadrat?
Place it where you like
Divide the sample area into a grid and use a random number generator to choose a square.
Throw the quadrat so it's random
Divide the sample area into a grid and choose a square.
Random sampling is used to estimate a population of a species in a habitat. Which of these is NOT correct?
We can just chuck the quadrat where we want to sample
We must choose coordinates randomly to avoid being biased in our results
We must take multiple readings and calculate a mean number
This method only really works for plants and (very)slow moving animals
A student was randomly sampling to estimate a clover population. In 5 quadrats, they found 11, 8, 11, 9 and 1 clover plants. What is the mode for these results?
8
9
11
40
Which of the following hypotheses would we use a transect sample for?
Comparing the population of daisies growing on lawns at the front and back of a house
Seeing if the height of stinging nettles changes as you move further away from a footpath
Estimating the total population of strawberry plants in a farmer's field
Investigating changes in the plant species present in sand dunes as you move further away from a beach
A student was randomly sampling to estimate a clover population. In 5 quadrats, they found 11, 8, 11, 9 and 1 clover plants. What is the mean for these results? Type out the number digits
(a)
Why is a random number generator is used to select coordinates for sampling?
To make the sampling easier
To avoid bias
To save some time
It is cheaper
Identify the line represented by the tape measure in the image
(a)
What term describes the middle number in a list of numbers?
Average
Mode
Mean
Median
The number of species and the number of individuals is measured by ....?
The Trent Biotic Index
The pH Scale
The Simpson's Index
The Lincoln Index
Which of the following is not a type of abiotic factor?
Light
Predation
Water
Salinity
Which of the following is measured with a belt transect?
Light
Wind
Percentage cover
Carbon dioxide levels
Select the two types of keys we have learned about
branching key
house key
coloured key
paired statement key
Which of the following reasons explains why grass grows abundantly in a field but not in a wood?
The woodland animals have eaten all the grass
The wood will be too sheltered from the wind
There is a higher light intensity in the field for photosynthesis
Limpets were found in 25 out of 50 quadrats. What percentage of quadrats contained limpets?
100%
25%
50%
75%
Randomly selecting 10 students from each year group in a school is an example of...
Simple random sampling
Stratified sampling
Systematic sampling
Quota sampling
Which of the following is true about quadrats?
quadrats should be placed randomly so that a representative sample is taken
you should look at the results from several quadrats in an area to reduce the effect of an unusual distribution
the results are more reliable when you look at the results from many quadrats
All the above are true
Why do scientists use sampling techniques to gather population data rather than counting everything?
scientists are lazy
sampling is more efficient and achievable
sampling is more accurate
scientists prefer estimations
sampling is cheaper
