Answer:
Check if the rock layer has fossils in it.
Explanation:
The rock layer from the inside out and the fossils will tell you how old the rock is.
Bill Nye hosted his own show called "Bill Nye the science guy" He was born on November 27, 1955, in Washington DC. He was a science communicator, television presenter, and mechanical engineer.
The _Embryo_ is the answer
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Chromosomes carry genetic information of the organism
Genes transfer genetic information from parent to offspring
arisen by mutation, and found alongside chromosomes
If the gradient or slope is high then the water flow will go faster because suppose water is flowing down from a skateboard ramp, it would flow faster than water flowing throw a straight pipe.
Here's a picture I drew to help you!