E&S Study Guide 1

Front

What determines the color of a star?

Back

The color of a star depends on its temperature.

Front

What is the model that describes the Earth as the center of the solar system?

Back

The geocentric model describes the Earth as the center of the solar system.

Front

What causes Kepler’s second law?

Back

Kepler’s second law is caused by gravity.

Front

What shape do planets orbit the Sun in?

Back

Planets orbit the Sun in an ellipse.

Front

What is required for nuclear fission to occur?

Back

High density and high temperature are required for fission to occur.

Front

Define the term 'heliocentric model'.

Back

The heliocentric model is the astronomical model in which the Earth and planets revolve around the Sun.

Front

What is Kepler's first law?

Back

Kepler's first law states that planets move in elliptical orbits with the Sun at one focus.

Front

What is the significance of gravity in astronomy?

Back

Gravity is the force that governs the motion of celestial bodies and keeps planets in orbit around stars.

Front

What is an ellipse?

Back

An ellipse is a geometric shape that looks like a flattened circle, and it describes the orbits of planets.

Front

What is the difference between the geocentric and heliocentric models?

Back

The geocentric model places the Earth at the center of the universe, while the heliocentric model places the Sun at the center.