Despite their limited time on earth, humans have been a dominant force of change to earth's systems. very little land or water is left untouched by human activity. humans have been such a force of change that scientists have proposed a new geological time period—the anthropocene or “age of the human.” when would you define as the beginning of the anthropocene epoch?

The hypothesis of continental drift states that earth's continents, which are located on tectonic plates, move relative to each other. which of the following is true of the movement of the tectonic plates? a. tectonic plates only move once every million years. b. they move at a rate of approximately 5 centimeters per year. c. tectonic plates never move, only the continents located on them do. d. their movements are very rapid and occur at random times.

What is thought to have caused the mass extinction at the end of the cretaceous period?

Pentane with molecular formula c5h12, exists in three isomeric forms. one shows linear carbon chains, another has one -ch3 groups present on the third carbon atom, and the third has two -ch3 groups present on the second carbon atom. what types of isomers are these? a. geometric isomers b. structural isomers c. halotropic isomers