Why doesn’t this occur during every lunar year

After getting the slide and microscope ready, stella is eager to see the microscopic pond water specimen! she crouches around her microscope and aligns her eye with the microscope’s eyepiece. but she's only able to see a bright white light. at this point, no specimens or cells are visible on stella's pond water slide. after taking a moment to collect her thoughts, stella realizes she can't see any lifeforms because .

Blood has traveled from the heart to the toes. which describes the next step of the circulation process?

Explain the source of radioactivity in uranium in earth’s crust by which it produces nuclear radiation