CER Components:

• Claim: What is your stance?
• Evidence: What data supports your claim? What data did you get from an experiment or research?
• Reasoning: Use scientific principles to help support your claim.

In science, there will be lessons were you have to make a claim and be able to support your claim. This is something you will have to do in your life as well. For example, who should win the 2020 Presidential Election? What is your claim? What is your evidence and reasoning that supports your claim? Being able to support your claim will give your claim merit. For example, let’s say you want to go to a camp this summer. You go up to your parents, and say, “I should go to a camp this summer because I want to.” There is a good chance your parents may say no, but, if you explain the benefits of going to camp then they are more likely to say yes. Not only in real life do you need to be able to support your claim, but you also need to be able to support your claim in Chemistry. The format of a CER will be used. What is a CER? CER means Claim, Evidence and Reasoning. 

https://www.youtube.com/watch?v=YuR33oY9hX0&feature=emb_logo