Question | Answer |
Characteristics of a substance that can be measured or observed without changing the identity of the material is___ | Physical Changes |
All of the following are chemical changes except... A. The burning of gasoline. B. A rusting car. C. Melting ice. D.Food digesting.(Only Letter) | C |
Which is not evidence of a chemical change? A. Fizzing. B. Change of phase. C. Color change. D. Formation of a precipitate. (Only Letter) | C |
Which is an example of a chemical change? A. Water boiling. B. Paper being cut. C. Ice freezing. D. Iron rusting | D |
What is the difference between a chemical and a physical change? | A chemical change is changing completely. A physical change is just changing the looks. |
What is the difference between a chemical property and a physical property? | A chemical property is the ability to be changed chemically. A physical property are the properties that you can see, feel, taste, hear or smell. |
What is the difference between a chemical property and a chemical change? | A chemical property is the ability to be changed chemically, a chemical change is actually being changed |
What is the difference between a physical property and a physical change? | A physical change is changing the looks, taste sounds, etc. A physical property is the looks, taste, sounds, etc. |
Why is boiling water not a physical change? | Water boiling is not a chemical change because the water molecules just spread out, they do not change at all. |
What reaction starts with one chemical and ends up with two? | Decomposition |
What reaction combines two chemicals into one new chemical? | Synthesis |
What reaction replaces one element in a compound with another chemical? | Single Replacement |
What reaction swaps out elements from different compounds with each other? | Double Replacement |
If a chemical reaction begins with 6 atoms of Carbon how many Carbon atoms should it have in the result?(number) | 6 |
A reaction produces 2 new substances and each have 25 grams. What was the total number of grams in the reactants?(number) | 50 |
How is balancing equations related to what the Law of Conservation says? | It shows how you can't create matter and you can't destroy it. You have to make sure you didn't destroy some of the molecules. |
What is the difference between a molecule and an atom? | A molecule is multiple atoms chemically bonded. An atom is just one element by itself. |