1, 3, 5 and 6 should be check marked.
I took the assignment and got it right :0
All but the second and fourth one should be checked off.
mars and venus at mostly rock.
saturn is classified as a gas giant.
pluto is considered a dwarf planet.
earth is much smaller that uranus.
planets are celestial bodies which revolutate around the sun
volcanoes (an event in the geosphere) release a large amount of particulate matter into the atmosphere. these particles serve as nuclei for the formation of water droplets (hydrosphere). rainfall (hydrosphere) often increases following an eruption, stimulating plant growth (biosphere).