Chapter 21 Test- Origins of Modern Astronomy

Front

Seasons are mainly caused by ___?

Back

Earth's tilted axis.

Front

What is the phase of the moon when it is half illuminated and decreasing?

Back

Third Quarter.

Front

What is the shape of a planet's orbit?

Back

An ellipse.

Front

Who proposed three laws of planetary motion using Tycho Brahe's data?

Back

Kepler.

Front

How old is the moon compared to Earth?

Back

The same age as Earth.

Front

What is the primary reason for the change in seasons on Earth?

Back

The tilt of Earth's axis.

Front

What is the term for the position of the moon when it is completely dark?

Back

New Moon.

Front

What is the term for the position of the moon when it is fully illuminated?

Back

Full Moon.

Front

What is the name of the scientist who formulated the law of universal gravitation?

Back

Newton.

Front

What is the term for the apparent shift in position of a nearby star against distant background stars?

Back

Parallax.