Answer:
Transport of sediments causes them to become rounder as their irregular edges are removed both by abrasion and corrosion. Beach sand becomes highly rounded due to its endless rolling and bouncing in the surf.
Vienna, Austria is the answer.
A probe is a spacecraft that travels through space to collect science information. Probes send data back to Earth for scientists to study. Mercury, Venus, Mars, Jupiter, Moons of Mars, and Moons of Saturn.
Answer:
4 billion years
Explanation:
Scientists have found the oldest known rocks on Earth. They are 4.28 billion years old, making them 250 million years more ancient than any previously discovered rocks. Earth formed about 4.6 billion years ago from a disk of gas and dust circling the sun.
