Earth possesses few visible craters and the Moon possesses many. This is because
a. Earth formed later than the Moon and, therefore hasn't encountered as many meteoroids.
b. the Moon doesn't have an atmosphere that could burn up many of the meteorites before impacting.
c. erosion and plate tectonics have slowly removed evidence of past cratering on Earth.
d. Earth formed later than the Moon and, therefore hasn't encountered as many meteoroids; the Moon doesn't have an atmosphere that could burn up many of the meteorites before impacting; and erosion and plate tectonics have slowly removed evidence of past cratering on Earth.
e. the Moon doesn't have an atmosphere that could burn up many of the meteorites before impacting and erosion and plate tectonics have slowly removed evidence of past cratering on Earth.
Question 2
Which of these gases is most responsible for the greenhouse effect on Earth?
a. oxygen (O2)
b. nitrogen (N2)
c. carbon dioxide (CO2)
d. ozone (O3)
e. ammonia (NH3)
The open ocean is the most extensive biome on earth.
Uranus revolves around the Sun once every 84 Earth years. Its average distance from the Sun is rough
Size comparison of Earth and Uranus
Saturn as Seen from Earth
Obliquity "Tilt of Earth on its axis"
Planet Earth compared to all its water and air!