Grade 12 ESS Review Exam

400

In a survey of an antelope population, 80 antelope were marked and released. Two weeks later a second sample was captured, of which 16 antelope were found unmarked and 4 were marked. What would be the estimated population size?

A soil with good water infiltration, poor nutrient holding capacity and good aeration is likely to be which type of soil?

Sandy soil

open system

A desert with very low precipitation and little vegetation is an example of which type of system? Open, closed or isolated?

A non-renewable resource or fossil fuel

An energy source that is relatively cheap, takes millions of years to form and produces greenhouse gases is called....

A

Leaching of soil nutrients is an example of A. transfer of materials. B. transformation of materials. C. transfer of energy. D. transformation of energy.

D

Modern commercial agricultural practices tend to A. lower species diversity in the community. B. reproduce early stages of succession to maximise net productivity. C. create conditions favourable for r-selected species. D. do all the above.

Coal

This energy source that has been removed from the energy sources used in Ontario?

primary consumers, different niches

Two herbivorous animals are part of the same community. One of them is prey to many predators and the other has no natural predator. These organisms are from what trophic level? Do they occupy the same or different niches?

CFCs

What is the main pollutant responsible for the reduction in stratospheric ozone?

Montreal Protocol

What is the name of the agreement forged in 1987 to halt production of CFCs in the atmosphere and increase stratospheric ozone?

Primary producers or producers or First Trophic level

What is the name of the trophic level in which the organisms make their own food from incoming solar radiation?

C

Which is the best explanation of the advantage of contour-plowing? A. Plowing across the contours improves the efficiency of harvesting techniques. B. Plowing across the contours improves drainage of the soil. C. Plowing parallel with the contours prevents erosion of the soil. D. Plowing parallel with the contours improves drainage of the soil.

D

Which process reduces storages of soil nutrients? A. Addition of well-composted organic matter B. Addition of lime C. Application of inorganic fertilizers D. Heavy rainfall