Why is the gravitational slingshot important to space exploration?
o to allow spacecraft to refuel without stopping
to spacecraft increase velocity without using additional fuel
o to make spacecraft weightless
o to make spacecraft safer

What does it mean for a cell membrane to be selectively permable

Most of the fossils found in virginia are in the coastal plain, valley, ridge, and appalachian plateau regions, best suggesting that these geographic provinces a) were once covered by seawater. b) are the oldest parts of virginia. c) have a great deal of karst topography. d) have large amounts of sedimentary rock.

The picture shows a fishing technique called trawling. how might trawling affect marine biodiversity