What was the significance of collisions of dust, rock, and ice during earth’s formation? a. to modify the density of materials present on earth b. to facilitate heat absorption from the surrounding space c. to blow away a strong burst of particles from the first atmosphere d. to harden materials to form different parts of earth’s layers

the earth is thought to have been formed about 4.6 billion years ago by collisions from a cloud of hydrogen, helium, rock, ice and other materials. these were pulled together by gravity to form objects in and around earth like- asteroids and small early planets called planetesimals.

so, the best possible answer to this question will be option d- to harden materials to form different parts of earth’s layers

all these collisions do one thing, and that thing is explained in the last option. when dusst, rocks and ice collide, they harden and form giant layers of rocks or hard ice.

d)   to harden materials to form different parts of earth’s layers

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