Question

what was the main difference between the geocentric and heliocentric models of the universe?
geocentric put earth at the center, heliocentric put the sun at the center
both models were exactly the same
heliocentric put earth at the center, geocentric put the sun at the center
geocentric was newer than heliocentric

Explanation:

The geocentric model, as the name suggests (geo - meaning Earth), positions Earth at the center of the universe. The heliocentric model (helio - meaning Sun) positions the Sun at the center. The other options are incorrect: they are not the same, the definitions of geocentric and heliocentric are mis - stated in the third option, and the geocentric model is older than the heliocentric model.

Answer:

Geocentric put Earth at the center, heliocentric put the Sun at the center.