Filtration, coagulation, settling basins and aerations are some examples of

weathering is the answer.

the eggs of the insects should be the first thing collected at the scene.

false

ask your friends for what they got then copy it down if you don't have any friends which is fine than google it or pay the teacher

which

what is a measurement of the earth’s history divided into time periods?

> fossil record <

sedimentary rock

> geologic time scale <

radioactive elements