Chapter 21 Flashcard- Intro. To Astronomy

Front

What is the term for the moon phase when it is more than half illuminated but not yet full?

Back

Waxing Gibbous

Front

Who was the first scientist to use a telescope for astronomical observations?

Back

Galileo

Front

What is the term for the moon phase that occurs when half of the moon is illuminated and it is increasing in illumination?

Back

First Quarter

Front

What is the shape of a planet's orbit around the sun?

Back

An ellipse

Front

What is the term for the moon phase when it is more than half illuminated but decreasing in illumination?

Back

Waning Gibbous

Front

What is the term for the moon phase when it is completely illuminated?

Back

Full Moon

Front

What is the term for the moon phase when it is less than half illuminated and increasing in illumination?

Back

Waxing Crescent

Front

What is the term for the moon phase when it is less than half illuminated and decreasing in illumination?

Back

Waning Crescent

Front

What is the name of the effect that causes the apparent motion of the stars due to the rotation of the Earth?

Back

Diurnal motion

Front

What is the name of the force that keeps planets in orbit around the sun?

Back

Gravitational force