What is environmentalism? 

A)  It is the science of studying the structure and function of nature. 
B)  It refers specifically to radical acts performed to focus attention on the environment. 
C)  It is a social movement dedicated to protecting the Earth's life support systems. 
D)  It is the sum total of everything that has been written about outdoor science.

Which of the following is characteristic of CFCs? 

A)  CFCs are biodegradable. 
B)  CFCs are corrosive and toxic. 
C)  CFCs are odourless and stable. 
D)  CFCs are expensive to produce.

Compared to the outer planets in our solar system, the inner planets are:

A) larger
B) contain more gas
C) rocky and so are called terrestrial planets
D) have better developed planetary rings
E) none of these

How is sand classified in terms of permeability and porosity? 

A)  high and high 
B)  high and low 
C)  low and high 
D)  low and low

Which letter in the diagram corresponds to the layer comprised of the troposphere and the stratosphere?

Coarsely crystalline igneous textures indicate that:

A) there was a lot of gas in the magma
B) the rock cooled quickly
C) the rock broke apart as it flowed
D) the rock cooled slowly
E) the ash and pumice were hot and became compacted

The ________________________________________ of the human immunodeficiency virus makes the virus hard to detect and makes it easy for the virus to spread.

Which statement describes a magnitude 9.0 earthquake? 

A)  It is nine times as strong as a magnitude 1.0 earthquake. 
B)  It is great. 
C)  It is minor. 
D)  It is insignificant.

Farmers use alley cropping-in which crops are planted in rows around hills rather than up and down the hills-to minimize soil erosion.

Which soil layer contains unique colours,and often iron,aluminums,humus,and clay leached from higher layers? 

A)  zone of leaching 
B)  topsoil 
C)  subsoil 
D)  parent material