Because it's closer to the sun.
Mars only has about 28% the surface area of the Earth. What's interesting is that number matches the land area of Earth, so the total surface of Mars is roughly the same as the dry land surface of Earth.
It's a rocky planet, but is much smaller than earth and colder.
Radius/diameter . . . Earth's is 1.876 as big as Mars's Surface area. . . . . . 3.521 times as much as Mars has Volume . . . . . . . . . . 6.62 times as much as Mars's Mass. . . . . . . . . . . . 9.35 times as much as Mars has Surface gravity. . . . 2.66 times as strong as Mars's
Jupiter is much warmer than Mars. Jupiter's atmosphere contains gases that trap heat, creating extremely high temperatures throughout the planet. Mars, on the other hand, has a thin atmosphere that does not retain heat well, resulting in much colder temperatures.
It is a rocky planet but smaller and colder than the earth
Is it the planet Mars.
it cannot be too much warmer or life on earth itself would have died out
It is warmer underground than on the surface because the Earth's inner core is much hotter than the surface. The temperature increases the deeper you go beneath the Earth's surface due to the geothermal heat coming from the Earth's interior.
No. The light from the sun has to travel farther to get to Mars, so it losses more intensity than it would if it were only traveling to Earth. As a result, the sun is dimmer on Mars than it is on Earth.
About half the amount of sunlight reaches the surface of Mars compared to Earth, due to its greater distance from the Sun. The thin atmosphere on Mars also scatters and absorbs some of the sunlight before it reaches the surface.
Earth is about 1.88 times larger than Mars.
Earth is colder than Venus. This is because Venus is much closer to the sun than Earth is.