Question

match each moon or planet to the most accurate characteristic. mars? it doesnt have enough gravity to have an atmosphere. venus? the temperature of its atmosphere is increased by the greenhouse effect. mercury? there may be liquid water under a thick layer of ice. europa? it used to be more like earth.

Explanation:

Mars is thought to have been more Earth - like in the past. Venus has a strong greenhouse effect that heats its atmosphere. Mercury has low gravity and lacks a substantial atmosphere. Europa is suspected to have liquid water under ice.

Answer:

Mars - It used to be more like Earth.
Venus - The temperature of its atmosphere is increased by the greenhouse effect.
Mercury - It doesn't have enough gravity to have an atmosphere.
Europa - There may be liquid water under a thick layer of ice.