For a solar eclipse to occur which of the following alignments is necessary? a. the moon is located along a straight line between the sun and earth b. the is located along a straight line between the sun and moon c. the moon is located from a line between the sun and earth d. the earth is located from a line 90 degrees between the sun and moon

A. I'm pretty sure, could be C though..

chemical properties are the characteristic of matter which can only be observed by changing the chemical identity of a sample like flammability reactivity and toxicity.

why is arctic sea ice important? arctic sea ice keeps the polar regions cool and moderate global climate. sea ice has a bright surface; 80 percent of the sunlight that strikes it is reflected back into space. as sea ice melts in the summer, it exposes the dark ocean surface.