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- 1. Multiple Choice
What is a square called that we use to sample populations?
grid
quadrat
cube
quarter
- 2. Multiple Choice
What type of population would you ESTIMATE using a quadrat?
- 3. Multiple Choice
Limpets were found in 25 out of 50 quadrats. What percentage of quadrats contained limpets?
100%
25%
50%
75%
- 4. Multiple Choice
Ten 1m2 quadrats were placed in a 40m2 field. On average 2 snails were found in every quadrat. Estimate the population size of the whole field.
2
10
40
80
20
- 5. Multiple Choice
These four 1m2 squared quadrats were place in a 8m2 garden. Estimate the total population of flowers in the whole garden.
16
17
8
40
20
- 6. Multiple Choice
Which organism can be measured with a quadrat?
lion
flies
rat
dandelion plants
fish
- 7. Multiple Choice
Which organism can be measured with a quadrat?
deer
butterfly
mouse
snail
fish
- 8. Multiple Choice
Can a quadrat be used on a large land organism that moves around in a herd?
yes - use a quadrat
no - you can't use a quadrat
- 9. Multiple Choice
What can a quadrat be used to measure?
length
weight
population density
volume
time
- 10. Multiple Choice
This 1m2 squared quadrat was place in a 3m2 beach. Estimate the total population of crabs in the whole beach.
15
12
18
6
5
- 11. Multiple Choice
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
- 12. Multiple Choice
What is a suitable way to sample small invertebrates living on the ground.
Quadrats
Sweep nets
Pitfall traps
Water Sampling
- 13. Multiple Choice
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.
- 14. Multiple ChoiceA living or once-living organisms in an ecosystem is apopulationbiotic factorabiotic factorcommunity
- 15. Multiple Choice
A non-living element in an ecosystem is an
animal
abiotic factor
biotic factor
organism
- 16. Multiple Choice
Which row in the table shows the correct piece of equipment for measuring each abiotic factor
Row A
Row B
Row C
Row D
- 17. Multiple Choice
When sampling organisms in a certain area using a quadrat you also need to know...
Area of the quadrats
Sum of area covered by quadrats and the field
Area of the field & area covered by quadrats
Area of the field
- 18. Multiple ChoiceBiased sampling iswhen you choose a population that is more likely to give you the result you wantwhen you choose a group that is equally likely to be chosen
- 19. Multiple ChoiceUnbiased sampling is:when you choose the group you think will represent the samplewhen any member of the population is equally likely to be chosen for the sample
- 20. Multiple Choice
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
- Answer choicesTagsAnswer choicesTags