[Astronomy] Rank these from smallest to largest. Helix Nebula, Mercury, Sun, Earth, Betelgeuse Star, Cat’s Eye Nebula, Io Moon, Jupiter, the Moon, Milky Way Galaxy, Metis Moon, Pinwheel Galaxy, Polaris (North Star), Ring Nebula, Sombero Galaxy.

Why might surface mining be less risky for miners than underground mining? a. surface miners can become trapped in a collapsed mine. b. surface miners work in dusty, enclosed areas. c. surface miners work aboveground. d. surface miners use elevators to enter mines.

An ecologist is studying the effects that a population of predators is having on a population of a prey. he used data from the field to produce this graph. which conclusion can draw from the graph?

What molecule does hemoglobin decay into over time