The chemical weathering process called oxidation is responsible for the rust on cars.
a. true
b. false
a. true
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Humus
A. helps to form pores that help aerate the soil. B. decreases the pH of the soil. C. is formed from organic matter. D. All of the statements are correct.
Waves tend to be parallel to the shore when they break due to the process of ____
A) diffraction B) reflection C) refraction D) reaction
When marine geologists collect a core of undeformed ocean-floor sediment, they know that the youngest layer is on the top of the core and the oldest is at the bottom because of the principle of ________.
A. supposition B. superposition C. suspension D. inclusion E. cross-cutting relationships
From the perspective of energy, which of the following is the most efficient trophic level?
A) primary producer B) primary consumer C) secondary consumer D) tertiary consumer E) decomposers