Professor Williams wrote some statements on the board: 1. Newton observed an apple falling off a tree and speculated that all th
ings on Earth are subject to the force of gravity. 2. He repeatedly tested his idea. 3. He found that any two objects in the universe have a gravitational attraction to each other. 4. His findings cannot be edited or replaced. Professor Williams is discussing a theory. a hypothesis. a law. an explanation.
During a scientific study there are different stages of the study which are termed as theory, hypothesis, law, explanation.
Hypothesis: It is defined as a possible explanation for a certain phenomenon. This hypothesis is further experimented for proof.
Theory: It is a well versed explanation of a phenomenon. It is drafted based on experiments and their results. Theory is thus given after an exhaustive work with substantial explanations.
Law: The statement made after certain experiments, observation which is in well accord with results. Thus Newton proposed a law,
When the cfcl3 in the atmosphere is hit by UV rays from the sun, it decomposes to Cl atoms. These Cl atoms then react with the ozone producing O2 and ClO. The ClO bombard with O atoms splitting the ClO up and the free Cl atom again bonds to another O3 molecule hence reducing it. One ClO can reduce several O3 molecules (up to 100,000) creating an ozone hole.
