What is the origin of Martian meteorites?
A) they are rocks brought to Earth by Martians
B) they are rocks brought back to Earth by sample return missions
C) they are rocks blasted from the surface of Mars by volcanoes; these rocks then floated around in interplanetary space before falling to Earth
D) they are rocks blasted from the surface of Mars by impacts; these rocks then floated around in interplanetary space before falling to Earth
Question 2
One of the most remarkable discoveries by biologists over recent decades is that life can
A) survive in an astonishing variety of environments
B) only exist in a very narrow range of environments
C) only exist under conditions that exist on Earth
D) survive in any and every environment, however harsh
The Origin of Organelles
Comparison of Ceres with the Moon and Earth
Earth’s Revolution
Classification of Igneous Rocks
Earth-Moon-Sun Positions during the Spring Tide
Earth 200 Million Years Ago