Petrified wood is an example of a fossil formed by ________.

a. permineralization replacing original cellulose of the wood
b. cast and mold preservation
c. direct preservation


a. permineralization replacing original cellulose of the wood

Environmental & Atmospheric Sciences

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A(n) ____________________ is an intense rotating column of air that extends downward from the base of a thunderstorm with a circulation reaching the ground

Fill in the blank with correct word.

Environmental & Atmospheric Sciences

The three varieties of seeps on the seafloor include hypersaline, hydrocarbon, and ________

A) abyssal plain seeps B) deep-sea trench seeps C) mid-ocean ridge seeps D) seamount seeps E) subduction zone seeps

Environmental & Atmospheric Sciences

Savannas usually include some trees dotting the landscape. This type of savanna is known as ________ savanna

A) lush B) rainforest C) arboreal D) park E) bunchgrass

Environmental & Atmospheric Sciences

Which of the following has the lowest water solubility?

A) butanal B) heptanal C) hexanal D) pentanal

Environmental & Atmospheric Sciences