Amass movement called a/an occurs when sediment suddenly slips downhill in one large mass

All of the following statements about the biosphere are true except: a. light and heat from the sun do not affect the biosphere. b. the biosphere gets resources from earth's crust, hydrosphere and atmosphere. c. like "biology", the name for the biosphere comes from the greek word for life. d. the biosphere includes all living organisms on earth's surface.

Find the equation of the line passing through the point (–1, 5) and perpendicular to the line 3x + y = 4.

What is the thickest layer of earth called?