Venus is the only planet that rotates in a reverse direction compared with the rest of the planets in our Solar System.  What is the most likely cause for Venus’s unusual rotation?

The surface layer of our Sun is called

Which process below drives plate tectonics on the surface of Earth?

A photon takes about a million years to escape from the solar core.  How long does it take for a neutrino to escape?

Which of the following terms describe an average distance between Sun and Earth?

What is Ptolemy’s epicycle supposed to explain?

What are the zodiacal constellations in Astronomy?

 Dorsal is the top of this picture and ventral is at the bottom.  What is the structure labeled “A”?  

Which of the following is NOT true about cardiac muscle?

What does Creatinine Phosphate do?