With distance from the spreading ridge, oceanic lithosphere becomes ________ and it ________
a. younger; subducts
b. older; subducts
c. younger; subsides
d. older; subsides
d
Environmental & Atmospheric Sciences
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An atom loses an electron to another atom. Is this an example of a physical or chemical change?
A) physical change involving the formation of negative ions B) chemical change involving the formation of neutral atoms C) physical change involving the formation of positive ions D) chemical change involving the formation of ions
Environmental & Atmospheric Sciences
High levels of ____ could indicate life on other planets
a. free nitrogen b. carbon dioxide c. free oxygen d. methane e. ozone
Environmental & Atmospheric Sciences
Which of the following fronts do not separate tropical from polar air masses?
A) cold B) warm C) stationary D) occluded
Environmental & Atmospheric Sciences
Approximately what percentage of blood plasma is water?
A) 15% B) 30% C) 60% D) 90%
Environmental & Atmospheric Sciences