Question

base your answer(s) to the following question(s) on the earth science reference tables, the diagram below, and your knowledge of earth science. the diagram represents the orbits of four planets and halleys comet. the period of revolution is shown for the comet. the orbital positions of halleys comet are shown for the years 1910, 1948, and 1986.
the solar system model shown in the diagram is best classified as
geocentric
heliocentric
topographic
lunar
how long does earth take to complete one orbit around the sun?
1 day
1 month
1 year
1 decade

Explanation:

• Question 12: The heliocentric model places the Sun at the center. In the diagram, planets and Halley's Comet orbit around the Sun, which is characteristic of the heliocentric model. The geocentric model has Earth at the center, the topographic model is about landforms, and the lunar model is related to the Moon.
• Question 13: By definition, the time it takes for Earth to complete one orbit around the Sun is 1 year. 1 day is the time for Earth to rotate once on its axis, 1 month is a period related to the Moon's orbit around Earth (approximate in some lunar - based calendars), and 1 decade is 10 years.

Answer:

1. heliocentric
2. 1 year