Take a rock and try dragging it. Kay, know put it on a cart with wheels. Try again. Which is easier?
Cell Theory
experiments test the scientist theory
The theory is modified.
The scientist who tested and proved Oparian's theory was Stanley L. Miller and Harold Urey.
it is an educated guess that can be tested by experiment
You are referring to Albert Einstein's Theory of Gravity.
ideas
The Atomic Theory
Cell Theory
cell theory
experiments test the scientist theory
theory
the russian scientist pavlov.
theory
theory
theory
theory