What causes eclipses? Select three options.

Earth’s rotation on its axis
moon’s shadow covering the Earth
Earth’s shadow covering the moon
Earth’s orbit and moon’s orbit occasionally aligning
the moon and Sun’s gravity pulling in the same direction

There is a liquid capsule inside a cup full of liquid. the cup full of liquid has salt in it and the liquid capsule has no salt in it. in which direction will the solvent flow? a. the salt does not have to move b. from the capsule to the larger cup c. equally between the capsule and the cup d. from the larger cup to the capsule

If you relate the doppler effect on sound to the color of light waves, a police car would be the color as it approaches and the color as it recedes away from the observer.

Abotanist working in the amazon rain forest discovers a new species of orchid. interestingly, males but not females of a certain wasp species keep visiting the flowers of these orchids. why?