Why do sunspots appear darker than their surroundings? A.
They are masked by dust and gas passing between Earth and the Sun.
B.
They are warmer than their surrounding environment.
C.
They are cooler than their surrounding environment.
D.
They have a strong gravitational pull, similar to black holes.
E.
They lie in the shadow cast by the Moon and Earth.

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.

Select the true statements about eubacteria. most live as decomposers and heterotrophs. most only thrive in a narrow range of environments. certain eubacteria are responsible for food poisoning. eubacteria thrive in extreme environments.

The body of water found at number 4 on the map above is the