1 Drainage basin-the area of land drained by a river. 2  Catchment area-the area within the drainage basin. 3  Watershed-the edge of highland surrounding a drainage basin.4  It marks the boundary between two drainage basins. 5  Source-The beginning or start of a river. 6  Confluence-the point at which two rivers or streams join. Watershed-the edge of highland surrounding a drainage basin. 2  It marks the boundary between two drainage basins. 3  Source-The beginning or start of a river. 4  Confluence-the point at which two rivers or streams join.
Dangerous levels of radiation in space could bar astronauts from a mission to Mars and limit prolonged activity on the moon, experts now caution.However, more research could reveal ways to handle the risks that radiation poses to space missions.The magnetic field of Earth protects humanity from radiation in space that can damage or kill cells. Once beyond this shield, people become far more vulnerable.owever, more research could reveal ways to handle the risks that radiation poses to space missions. The magnetic field of Earth protects humanity from radiation in space that can damage or kill cells. Once beyond this shield, people become far more vulnerable.
Some of the LSD risks include 1  : Bad trips. 2  A person using LSD may have a bad trip, even if they have taken LSD without negative effects in the past. 3  In a bad trip a person may see or feel frightening things. 4  It can lead a person to hurting him/herself or someone else.5  A bad acid trip can last up to 12 hours.very time people use LSD they are taking a risk, but many people don't know the LSD risks or don't think the negative effects of LSD use can happen to them. Keep reading to learn about some of LSD risks such as-bad lsd trips, acid flashbacks, mental damage, and more...