Why do constellations appear to change during the seasons? Choose the two correct answers. Is it A) The constellations change positions relative to each other. Or B)Some constellations disappear from view since they're in the sky during the day. Or C)he angle of Earth's axis changes with respect to constellations. Or D)The position of constellations shifts from east to west. Or E)The constellations revolve around the sun.

What is avogadro’s number, and why is it useful

Use examples from the article to explain one positive and one negative effect that chemistry has had on society.

Pegmatites are igneous rocks in which the individual minerals are very large. typically, the minerals are all light-colored quartz, feldspar and muscovite. if you were given a black and white photograph of a pegmatite in a quarry (where the rock has been blasted and broken), what physical properties could you use to identify those three minerals in this hypothetical photo? describe each mineral and the specific diagnostic properties. be specific.