6. How does lichen wear down a rock even after it dies? O Fungi and algae fill the space and crack the rock
New lichen grows from the dead lichen and breaks apart the rock
O Other plants feed on the dead lichen and push apart the rock
O Insects feed on the dead lichen and wear down the rock

1. a)c-14 has two more protons

2. d)they have different numbers of protons, neutrons, and valence electrons; they are all gases at room temperature.

3. c) iron and nickel.

the correct answer would be b. amelia, because the particals of gas move really fast (charged particals) and gas also has a lot of room (particals move independently) so the only answer that has both of those is amelia's.