Earth Science 1st Semester Review

Front

What happens to a star when it runs out of fuel?

Back

As gravity gets greater, the star will collapse.

Front

According to Kepler's 1st Law, what type of orbit do planets move around the Sun?

Back

Elliptical.

Front

What is the term for when a planet is closest to the Sun in its orbit?

Back

Perihelion.

Front

How does a massive star's burning rate compare to a star like our sun during the main sequence stage?

Back

The star burns faster and hotter.

Front

How does the speed of a planet change as it orbits the Sun in an elliptical path?

Back

The speed increases as the planet gets closer to the Sun and decreases as it moves away.

Front

What is the term for the point in a planet's orbit farthest from the Sun?

Back

Aphelion.

Front

What force keeps planets in orbit around the Sun?

Back

Gravity.

Front

What is the main sequence stage of a star?

Back

It is the longest stage in a star's life cycle where it fuses hydrogen into helium.

Front

What is the relationship between a star's mass and its lifespan?

Back

More massive stars have shorter lifespans due to faster fuel consumption.

Front

What is the significance of the Hertzsprung-Russell diagram?

Back

It classifies stars based on their luminosity and temperature.