Place the events that formed the solar system in the time order

planetesimals collide to form large bodies whose surfaces become smooth due to gravity.
dust and gases flatten into a spinning disk.
dust and gases collide to form planetesimals.
dust and gases form a cloud.
matter collects at the center of the disk and heats up; fusion begins.

Giga is the second highest prefix on the normal scale, the first is terra.

By water evaporation from the leaves is created a negative pressure at the top of the tree that promotes the ascension  of the water through channels that are called xylem. there are also two molecule forces that are involved: the intra-water molecules cohesion (water molecules stick to each other) and the adhesion when the water molecules stick to the channels they are running in. this is what enables water to go from the roots to the top of a tall tree.