Abiotic factors are non-living variables. Biotic factors are the interactions between organisms. Both affect diversity and distribution. Sampling helps us to estimate numbers of organisms in an area.
Which piece of equipment can be used for estimating the number of plants in an area?
Which of the following is a piece of equipment that can be used to sample the ground invertebrates in a habitat?
Which of these pieces of equipment can be used to measure an abiotic factor?
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
How can a representative sample of the plant species growing in a field be obtained?
By randomly placing a quadrat at many different locations around the field
By randomly placing many quadrats in one corner of the field
By placing one quadrat at a random location in the field
How can errors be minimised when using a moisture meter?
Use the probe several times in row
Wipe the probe between samples
Wave the probe around in the air between samples
How can the reliability of light meter readings be checked?
Take several readings and obtain an average
Take one reading and then another later in the day
Take one reading
What information does the presence or absence of an indicator species provide about an environment?
How many species are present
How much competition is present
How much pollution is present
Which of the following is an abiotic factor?
Which of the following is a biotic factor?