reword this It's super important to make models because, first, you can make them look like how you imagine them. Second, you can design them so that everyone can get what they mean. Lastly, while you're building or looking at the model, you can learn more and really understand it better!

Answer 1

Creating models is essential for several reasons. First, they allow you to visualize your ideas as you envision them. Second, you can design them in a way that communicates their meaning to everyone. Finally, while constructing or examining the model, you can enhance your understanding and gain deeper insights!

Answer 2

reword this The scientist figured out that the product would be 15.9 grams of copper sulfide by using something called the Law of Conservation of Matter. This law says that during a chemical reaction, the atoms just get rearranged, but the total amount stays the same. So, if you take 12.7 grams and add 3.2 grams:

12.7

+ 3.2

--------

You get 15.9 grams.

So, he knew it would be 15.9 because he added those numbers together, and the law told him he was correct

Answer 3

The scientist determined that the product would be 15.9 grams of copper sulfide by applying the Law of Conservation of Matter. This principle states that during a chemical reaction, the atoms are simply rearranged, but the total mass remains constant. By adding 12.7 grams and 3.2 grams together:

12.7

• 3.2

---

You arrive at 15.9 grams.

Hence, he concluded that the result would be 15.9 grams, as the addition confirmed the validity of the law.