Planet A Planet B Planet C Distance from Sun 0.718 AU 1 AU 5.20 AU
Mass 4.8676 × 1024 kg 5.9726 × 1024 kg 1,898.3 × 1024 kg
Planet Composition rocky mantle, iron core rocky mantle, iron core hydrogen, helium
Gases in Atmosphere 96% carbon dioxide, 3% nitrogen, 1% other 78% nitrogen, 21% oxygen, 1% other mostly hydrogen and helium
Atmospheric Pressure on Planet’s Surface 92 bars 1 bar > 1,000 bars
Average Temperature 464°C 15°C -108°C
Part A
Which of these planets is Earth? Explain your answer.

Explanation:

Image result for Which of these planets is Earth?

Earth, our home, is the third planet from the sun. It's the only planet known to have an atmosphere containing free oxygen, oceans of water on its surface and, of course, life. Earth is the fifth largest of the planets in the solar system.

According to the table, planet B is 1 AU from the Sun and the atmospheric pressure on the planet’s surface is 1 bar. Also, the planet’s atmosphere contains oxygen, which is essential for life. These are the properties of Earth. So, planet B is Earth.

Explanation:

Plato