Nova Scotians are the biggest users of fresh water in Canada.

Mountain streams and rivers typically are characterized by:

A) steep gradients and are confined by bedrock canyons
B) low gradients and unconfined channels
C) steep gradients and unconfined channels
D) low gradients and are confined by bedrock canyons

Which of the following is a way that plate tectonics can affect climate?

A) mountain ranges intercept wind and water, affecting rainfall amounts
B) rapid seafloor spreading displaces water from the ocean basins
C) tectonic subsidence during earthquakes can cause flooding and change local climates
D) volcanic activity releases CO₂ and water vapor that can cause atmospheric warming
E) all of these

Which of the following is a nonmetallic mineral resource? 

A)  iron 
B)  copper 
C)  aluminum 
D)  phosphates

Salt is less dense and weaker than other types of rocks so it flows upward to form:

A) domes
B) folds
C) basins
D) faults

Which example is biodegradable? 

A)  Something that can be broken down by autotrophs. 
B)  Something that cannot be broken down by any living processes. 
C)  Something that can be broken down by heterotrophs. 
D)  Something that can be broken down by decomposers.

Which letter in the diagram indicates the profile in which the predominant plants are pine,fir,and spruce trees because they can withstand the humid,cold climate?

When the waste outputs of one organism become nutrient inputs for another organism,waste is reduced.

When are consumers of recycled products most effective? 

A)  when they maximize the amount of pre-consumer waste in the products 
B)  when they maximize the amount of post-consumer waste in the products 
C)  when they maximize the amount of post-producer waste in the products 
D)  when they maximize the amount of pre-producer waste in the products

What is one possible outcome of increased levels of carbon dioxide in the troposphere? 

A)  The rate of photosynthesis may decrease because there are no other limiting factors. 
B)  More northern species may start to migrate southward. 
C)  Species diversity in tropical rain forests, such as the Amazon, may be altered. 
D)  The number of plant-eating insects in rain forests may decrease.