Answer:
The expected surface temperature of Venus, Earth, and Mars would be 462°C, 15°C, and -60°C respectively.
Step-by-step explanation:
If the three planets did not have an atmosphere, the average surface temperature of Venus would be about 462°C, the average surface temperature of Earth would be about 15°C, and the average surface temperature of Mars would be about-60°C.
The atmosphere plays a role in trapping heat and maintaining a habitable temperature on a planet by acting like a blanket.