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Quadrat Sampling
How would you estimate the population of daisies in a field? Find out in this quiz.

Quadrat Sampling

This Biology quiz is called 'Quadrat Sampling' and it has been written by teachers to help you if you are studying the subject at middle school. Playing educational quizzes is a fabulous way to learn if you are in the 6th, 7th or 8th grade - aged 11 to 14.

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Ecology is the study of organisms in their habitats. The distribution of the organisms in a particular habitat can be affected by such physical factors as light, shelter from the wind and temperature. In order to try to make a scientific analysis of the organisms and their distribution in a habitat, quadrat sampling and line transects are useful tools. This middle school Biology quiz is all about quadrat sampling.

1.
What do we call the place where an organism lives?
Its habit
Its habitat
Its ecosystem
Its environment
Each habitat has a unique set of plants and animals that are adapted for life there
2.
In a field, why would there be very few daisies under a tree?
Not enough light
Temperature too low
pH too acidic
Trampling
The ground under a tree is also low in moisture and nutrients as the tree removes both for its own use
3.
Which of the following factors could limit the distribution of moss?
pH
Wind
Grazing animals
Water
That's because mosses are adapted to a moist environment
4.
What is the name for sampling along a line across the area of interest in the field?
Transmitter
Transition
Transect
Transformer
This helps ecologists measure gradual changes from one side of a habitat to the other
5.
What do we call the square frame, usually 0.5m by 0.5m, used in sampling organisms?
A quadrant
A quadrangle
A quadrat
A quadratic
It is placed randomly in the field
6.
Lichens can be found growing on quite exposed walls and on rocks. This is because they are adapted to withstand...
high temperatures
wind
drying out (dessication)
the sun
They can survive long periods without water. They are called composite organisms because they are a symbiotic combination of fungus with an algae or cyanobacteria
7.
How would you estimate the population of daisies in a field?
Random quadrat sampling, counting daisies in the frame then multiplying up to the whole field area
Counting every daisy in the field
Throwing the quadrat and counting how many daisies there are inside the frame
Counting all the daisies that touch the line
Just throwing a quadrat and hoping for the best is not random sampling. Scientists divide the field into coordinates and use a random number generator to select the sampling sites
8.
What are abiotic factors?
Non-living conditions
Living conditions
Dead conditions
Absent conditions
Examples are temperature and humidity
9.
What are biotic factors?
Non-living conditions
Living conditions
Dead conditions
Absent conditions
Biotic factors include competition and predation
10.
Which of these is an abiotic factor?
Light intensity
Time
Competition
Parasitism
Some plants are adapted to growing in low light conditions - they have large leaves and high levels of chlorophyll
Author:  Donna Maria Davidson

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