Cycads evolved during the Triassic. Indicate whether the statement is true or false
T
Environmental & Atmospheric Sciences
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What kind of forces act on the crust at divergent boundaries?
A) tensional forces that stretch the crust and generate a spreading center B) compressional forces that crunch the crust and generate a spreading center C) compressional forces that crunch and shorten the crust by folding and faulting D) compressional forces due to plate collision
Environmental & Atmospheric Sciences
What does an object have when moving that it doesn't have when at rest?
A) momentum B) energy C) mass D) inertia E) none of the above
Environmental & Atmospheric Sciences
Late Silurian through Permian “plate-skinned” fish with jaws and bony armor, especially in the
head-shoulder region:a. placoderms d. chordates b. ostracoderms e. therapsids c. pelycosaurs
Environmental & Atmospheric Sciences
When do cosmologists think the universe began?
What will be an ideal response?
Environmental & Atmospheric Sciences