You are on a field trip and are recording the amount of mass in a volume of water. what are you measuring? a) the concentration of bacteria in seawater b) the concentration of dissolved oxygen in seawater c) the concentration of salt in seawater d) the density of seawater

What two temperature scales do scientists use

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.

Deer cave cannot support photosynthesis is as not enough sunlight is present. in spite of this, it still has a complex food chain. what is the energy foundation of this food chain?