What agent of deposition is this? Gravity, wind, waves, running water or glaciers.

What are two reasons for why a species might disappear from the fossil record?

What was dr. willem johan kolff’s first step in using the scientific process to invent the hemodialysis machine? he built the machine and tried it with various patients, collecting data about its effectiveness. when a patient’s kidneys failed, he wondered if it would be possible to perform kidney functions with an external machine. he researched and collected data about numerous patients who exhibited symptoms of kidney failure. he drew conclusions from studies of various symptoms of kidney failure, and drew a design for the ideal external blood-processing machine.

To confirm when to exclude children from school it’s recommended that you refer to guidelines from which of the following organizations