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Sit on the floor with your legs straight out, raise your straight arm out with your thumb up such that your thumb aligns with one of your big toes, rapidly blink your left and right eye, and observe how your big toe appears to shift positions. This demonstration is an example of _________________.

An observer on Earth’s geographic north pole would find

An observer on Earth’s equator would find _______

The observed amount of difference between the perihelion of Earth in early January and aphelion in early July results in the northern hemisphere being _____.

The semimajor axis of an ellipse is

What is the order of star colors with increasing temperature?

Earth doesn’t experience a solar eclipse every month because

Long wavelength visible light

Saturn orbits the Sun and follows which laws? Choose the best answer. I. Kepler’s first II. Kepler’s second III. Kepler’s third IV. Newton’s law of gravitation  

If the Sun passes directly overhead on at least one day per year, then